diff --git a/Makefile.in b/Makefile.in
index 7e92e554a2..569e5e2d2a 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -543,7 +543,7 @@ mptester$(EXE):	sqlite3.c $(TOP)/mptest/mptest.c
 	mkdir tsrc
 	cp -f $(SRC) tsrc
 	rm tsrc/sqlite.h.in tsrc/parse.y
-	$(TCLSH_CMD) $(TOP)/tool/vdbe-compress.tcl <tsrc/vdbe.c >vdbe.new
+	$(TCLSH_CMD) $(TOP)/tool/vdbe-compress.tcl $(OPTS) <tsrc/vdbe.c >vdbe.new
 	mv vdbe.new tsrc/vdbe.c
 	touch .target_source
 
diff --git a/Makefile.msc b/Makefile.msc
index bfd99179fd..a7f8ee5527 100644
--- a/Makefile.msc
+++ b/Makefile.msc
@@ -930,7 +930,7 @@ mptester.exe:	$(TOP)\mptest\mptest.c libsqlite3.lib $(LIBRESOBJS) sqlite3.h
 	-mkdir tsrc
 	for %i in ($(SRC)) do copy /Y %i tsrc
 	del /Q tsrc\sqlite.h.in tsrc\parse.y
-	$(TCLSH_CMD) $(TOP)\tool\vdbe-compress.tcl < tsrc\vdbe.c > vdbe.new
+	$(TCLSH_CMD) $(TOP)\tool\vdbe-compress.tcl $(OPTS) < tsrc\vdbe.c > vdbe.new
 	move vdbe.new tsrc\vdbe.c
 	echo > .target_source
 
diff --git a/VERSION b/VERSION
index a08ffae0ca..269aa9c86d 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.8.2
+3.8.3
diff --git a/configure b/configure
index d4bbd2d9be..2403018bb8 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.62 for sqlite 3.8.2.
+# Generated by GNU Autoconf 2.62 for sqlite 3.8.3.
 #
 # Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
 # 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
@@ -743,8 +743,8 @@ SHELL=${CONFIG_SHELL-/bin/sh}
 # Identity of this package.
 PACKAGE_NAME='sqlite'
 PACKAGE_TARNAME='sqlite'
-PACKAGE_VERSION='3.8.2'
-PACKAGE_STRING='sqlite 3.8.2'
+PACKAGE_VERSION='3.8.3'
+PACKAGE_STRING='sqlite 3.8.3'
 PACKAGE_BUGREPORT=''
 
 # Factoring default headers for most tests.
@@ -1483,7 +1483,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures sqlite 3.8.2 to adapt to many kinds of systems.
+\`configure' configures sqlite 3.8.3 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1548,7 +1548,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of sqlite 3.8.2:";;
+     short | recursive ) echo "Configuration of sqlite 3.8.3:";;
    esac
   cat <<\_ACEOF
 
@@ -1664,7 +1664,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-sqlite configure 3.8.2
+sqlite configure 3.8.3
 generated by GNU Autoconf 2.62
 
 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
@@ -1678,7 +1678,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by sqlite $as_me 3.8.2, which was
+It was created by sqlite $as_me 3.8.3, which was
 generated by GNU Autoconf 2.62.  Invocation command line was
 
   $ $0 $@
@@ -14021,7 +14021,7 @@ exec 6>&1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by sqlite $as_me 3.8.2, which was
+This file was extended by sqlite $as_me 3.8.3, which was
 generated by GNU Autoconf 2.62.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -14074,7 +14074,7 @@ Report bugs to <bug-autoconf@gnu.org>."
 _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_version="\\
-sqlite config.status 3.8.2
+sqlite config.status 3.8.3
 configured by $0, generated by GNU Autoconf 2.62,
   with options \\"`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`\\"
 
diff --git a/main.mk b/main.mk
index 9fa83aed2f..d95bea908e 100644
--- a/main.mk
+++ b/main.mk
@@ -408,7 +408,7 @@ target_source:	$(SRC) $(TOP)/tool/vdbe-compress.tcl
 	mkdir tsrc
 	cp -f $(SRC) tsrc
 	rm tsrc/sqlite.h.in tsrc/parse.y
-	tclsh $(TOP)/tool/vdbe-compress.tcl <tsrc/vdbe.c >vdbe.new
+	tclsh $(TOP)/tool/vdbe-compress.tcl $(OPTS) <tsrc/vdbe.c >vdbe.new
 	mv vdbe.new tsrc/vdbe.c
 	touch target_source
 
diff --git a/manifest b/manifest
index 6a877d835f..464679b544 100644
--- a/manifest
+++ b/manifest
@@ -1,12 +1,12 @@
-C Update\sto\sthe\s3.8.2\srelease.
-D 2013-12-06T15:49:45.770
+C Merge\sin\sall\srecent\spreformance\senhancements\sfrom\strunk.
+D 2013-12-14T18:24:46.659
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
-F Makefile.in 06b851f767034811d4f6e159367c453dc28d3925
+F Makefile.in e4ee6d36cdf6136aee0158675a3b24dd3bf31a5a
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
-F Makefile.msc 6a5de96f1aa7295af16da686c8248fea9e0a694c
+F Makefile.msc 043280f9ca15befa7236484a6c1448d9271abd73
 F Makefile.vxworks db21ed42a01d5740e656b16f92cb5d8d5e5dd315
 F README cd04a36fbc7ea56932a4052d7d0b7f09f27c33d6
-F VERSION 52f7e22bfcec71a462e34194b4ae1671380fde59
+F VERSION 8ed548d87d0a27fd7d7620476f9e25f9fa742d73
 F aclocal.m4 a5c22d164aff7ed549d53a90fa56d56955281f50
 F addopcodes.awk 87ca612393d0f439550634bd2c156ea9ff6195ae
 F art/sqlite370.eps aa97a671332b432a54e1d74ff5e8775be34200c2
@@ -38,7 +38,7 @@ F autoconf/tea/win/rules.vc c511f222b80064096b705dbeb97060ee1d6b6d63
 F config.guess 226d9a188c6196f3033ffc651cbc9dcee1a42977
 F config.h.in 0921066a13130082764ab4ab6456f7b5bebe56de
 F config.sub 9ebe4c3b3dab6431ece34f16828b594fb420da55
-F configure f97b17cd80fa428e5df4e70a36ed5b4ed21100c2 x
+F configure 1673bc402f8fc95015f72c279adc5a9a668ee237 x
 F configure.ac 4cf9f60785143fa141b10962ccc885d973792e9a
 F contrib/sqlitecon.tcl 210a913ad63f9f991070821e599d600bd913e0ad
 F doc/lemon.html 334dbf6621b8fb8790297ec1abf3cfa4621709d1
@@ -156,7 +156,7 @@ F ext/session/test_session.c d38968307c05229cc8cd603722cf305d6f768832
 F install-sh 9d4de14ab9fb0facae2f48780b874848cbf2f895 x
 F ltmain.sh 3ff0879076df340d2e23ae905484d8c15d5fdea8
 F magic.txt f439556c5ce01ced70987e5ee86549a45165d9ff
-F main.mk a0a333b9ec8d5156c0b8f1a9e91da883a1890cfe
+F main.mk 3cbbebc94dfb328e26647e13be242ded25b7e17f
 F mkdll.sh 7d09b23c05d56532e9d44a50868eb4b12ff4f74a
 F mkextu.sh 416f9b7089d80e5590a29692c9d9280a10dbad9f
 F mkextw.sh d2a981497b404d6498f5ff3e3b1f3816bdfcb338
@@ -177,14 +177,14 @@ F src/alter.c 2af0330bb1b601af7a7789bf7229675fd772a083
 F src/analyze.c 581d5c18ce89c6f45d4dca65914d0de5b4dad41f
 F src/attach.c 0a17c9364895316ca4f52d06a97a72c0af1ae8b3
 F src/auth.c 523da7fb4979469955d822ff9298352d6b31de34
-F src/backup.c 1809a7caa2504233bdddd12f5018422421789537
+F src/backup.c a729e63cf5cd1829507cb7b8e89f99b95141bb53
 F src/bitvec.c 19a4ba637bd85f8f63fc8c9bae5ade9fb05ec1cb
 F src/btmutex.c 976f45a12e37293e32cae0281b15a21d48a8aaa7
-F src/btree.c fe6c95c57fd14ed4b3329f4b5bb08132fe7c322d
+F src/btree.c 11e29ef8cf16a42925fde036bcffbeffd9cc82df
 F src/btree.h a61ddebc78c66795a2b93181321a116746302cc9
 F src/btreeInt.h f038e818bfadf75afbd09819ed93c26a333d39e0
-F src/build.c 1965c7b596ca6295b7ca59541ad186c57564b8f7
-F src/callback.c f99a8957ba2adf369645fac0db09ad8adcf1caa2
+F src/build.c 47ef8209e56d840d2b35b8a243c6ee567ad52bda
+F src/callback.c 174e3c8656bc29f91d710ab61550d16eea34be98
 F src/complete.c dc1d136c0feee03c2f7550bafc0d29075e36deac
 F src/ctime.c 77779efbe78dd678d84bfb4fc2e87b6b6ad8dccd
 F src/date.c 593c744b2623971e45affd0bde347631bdfa4625
@@ -192,7 +192,7 @@ F src/delete.c 65c34400e401c482501dac5cd14a12621260f6d0
 F src/expr.c 31a2b65339f6c3795d4cfa5e99798cd72f9fdfdf
 F src/fault.c 160a0c015b6c2629d3899ed2daf63d75754a32bb
 F src/fkey.c 2ab0f5384b70594468ef3ac5c7ed8ca24bfd17d5
-F src/func.c ef30d26ae4d79bbc7300c74e77fd117a0ba30235
+F src/func.c fed87f35cf4da4a798b726d84abefc209b48d831
 F src/global.c 1d7bb7ea8254ae6a68ed9bfaf65fcb3d1690b486
 F src/hash.c ac3470bbf1ca4ae4e306a8ecb0fdf1731810ffe4
 F src/hash.h 8890a25af81fb85a9ad7790d32eedab4b994da22
@@ -202,8 +202,8 @@ F src/journal.c b4124532212b6952f42eb2c12fa3c25701d8ba8d
 F src/legacy.c 0df0b1550b9cc1f58229644735e317ac89131f12
 F src/lempar.c cdf0a000315332fc9b50b62f3b5e22e080a0952b
 F src/loadext.c 867c7b330b740c6c917af9956b13b81d0a048303
-F src/main.c f432ac8a820b4b9fbfd41c40c686f8d971791abe
-F src/malloc.c 543a8eb5508eaf4cadf55a9b503379eba2088128
+F src/main.c 292a67f4f803068ce5d160cfe76c052d8713e045
+F src/malloc.c 0203ebce9152c6a0e5de520140b8ba65187350be
 F src/mem0.c 6a55ebe57c46ca1a7d98da93aaa07f99f1059645
 F src/mem1.c c0c990fcaddff810ea277b4fb5d9138603dd5d4b
 F src/mem2.c dce31758da87ec2cfa52ba4c5df1aed6e07d8e8f
@@ -219,36 +219,36 @@ F src/notify.c 976dd0f6171d4588e89e874fcc765e92914b6d30
 F src/os.c b4ad71336fd96f97776f75587cd9e8218288f5be
 F src/os.h 4a46270a64e9193af4a0aaa3bc2c66dc07c29b3f
 F src/os_common.h 92815ed65f805560b66166e3583470ff94478f04
-F src/os_unix.c f076587029285554a3a65d30d0e71d50cd61f41f
-F src/os_win.c 4323dd0bac4f7a7037fc4cf87fb4692d17f0b108
-F src/pager.c 2aa4444ffe86e9282d03bc349a4a5e49bd77c0e8
-F src/pager.h f094af9f6ececfaa8a1e93876905a4f34233fb0c
+F src/os_unix.c 60a7b3b23e6fcf83a50d1e320b280b551724e11f
+F src/os_win.c 16eac0961603182ffc10c02b39fe830126538e07
+F src/pager.c efa923693e958696eee69b205a20bfbc402c8480
+F src/pager.h ffd5607f7b3e4590b415b007a4382f693334d428
 F src/parse.y acee1a9958539e21263362b194594c5255ad2fca
 F src/pcache.c f8043b433a57aba85384a531e3937a804432a346
 F src/pcache.h a5e4f5d9f5d592051d91212c5949517971ae6222
-F src/pcache1.c a467393909a4ed7ca9de066d85ba5c5b04a5be63
+F src/pcache1.c 57fee9a9a617218f5037afbbe49b09da65bde56b
 F src/pragma.c 5ab7279d132143feb77f773688a24ab05da75fd7
 F src/prepare.c 359d1a1e9c9bd4488e4dd3a1aaaf2d2ebb9bb768
-F src/printf.c da9119eb31a187a4b99f60aa4a225141c0ebb74b
+F src/printf.c ba8b28e9d4ce984430e9f33f6ef1c85a1826d1dd
 F src/random.c 0b2dbc37fdfbfa6bd455b091dfcef5bdb32dba68
 F src/resolve.c 7eda9097b29fcf3d2b42fdc17d1de672134e09b6
 F src/rowset.c 64655f1a627c9c212d9ab497899e7424a34222e0
 F src/select.c d41381d80a22d3a83352aeca274cccf264ac277a
-F src/shell.c 936a72ff784efff3832cce274a96ed0b036e6758
-F src/sqlite.h.in afb55228e32532456938c5c4ac0b9aa0828f3677
+F src/shell.c 18924f6ccfa70da98bf9e388bab512c0fd1e792e
+F src/sqlite.h.in 9ccaa04411778b0b3a95df6a9fc9c396b779f0cb
 F src/sqlite3.rc 11094cc6a157a028b301a9f06b3d03089ea37c3e
 F src/sqlite3ext.h 886f5a34de171002ad46fae8c36a7d8051c190fc
-F src/sqliteInt.h f4056513ed1a1690f1ff0ec6df15b38581676f2f
+F src/sqliteInt.h 8c7d6a7f3474c3b487311baeb03ba72120e35716
 F src/sqliteLimit.h 164b0e6749d31e0daa1a4589a169d31c0dec7b3d
 F src/status.c 7ac05a5c7017d0b9f0b4bcd701228b784f987158
 F src/table.c 2cd62736f845d82200acfa1287e33feb3c15d62e
 F src/tclsqlite.c 758fa6b6cfd39330db8b71b1f94e46f03ef375b8
-F src/test1.c 760e0419705f712d80595f47199568cd7e3b57a4
+F src/test1.c 633e5e6a116acf4473b9289240bcceb5320a9d93
 F src/test2.c 7355101c085304b90024f2261e056cdff13c6c35
 F src/test3.c 1c0e5d6f080b8e33c1ce8b3078e7013fdbcd560c
 F src/test4.c 9b32d22f5f150abe23c1830e2057c4037c45b3df
 F src/test5.c a6d1ac55ac054d0b2b8f37b5e655b6c92645a013
-F src/test6.c 4f958b71334695e65746d357dac77709732b28db
+F src/test6.c 41cacf3b0dd180823919bf9e1fbab287c9266723
 F src/test7.c 72b732baa5642f795655ba1126ea032af46ecfd2
 F src/test8.c c7aab1d9fbbf54fc33d43b73aa24aa55f9eaf534
 F src/test9.c bea1e8cf52aa93695487badedd6e1886c321ea60
@@ -286,28 +286,28 @@ F src/test_syscall.c 16dbe79fb320fadb5acd7a0a59f49e52ab2d2091
 F src/test_tclvar.c f4dc67d5f780707210d6bb0eb6016a431c04c7fa
 F src/test_thread.c 1e133a40b50e9c035b00174035b846e7eef481cb
 F src/test_vfs.c e72f555ef7a59080f898fcf1a233deb9eb704ea9
-F src/test_vfstrace.c 34b544e80ba7fb77be15395a609c669df2e660a2
+F src/test_vfstrace.c 3a0ab304682fecbceb689e7d9b904211fde11d78
 F src/test_wsd.c 41cadfd9d97fe8e3e4e44f61a4a8ccd6f7ca8fe9
 F src/tokenize.c ec4c1a62b890bf1dbcdb966399e140b904c700a4
 F src/trigger.c d84e1f3669e9a217731a14a9d472b1c7b87c87ba
 F src/update.c 4ada523da2d315996296456a8e384f11983a9aa0
 F src/utf.c 6fc6c88d50448c469c5c196acf21617a24f90269
-F src/util.c 76ed0519296e3f62e97e57dab1999e34184c8e49
+F src/util.c e71f19b272f05c8695cf747b4bac1732685f9e5c
 F src/vacuum.c 3728d74919d4fb1356f9e9a13e27773db60b7179
-F src/vdbe.c 9c6fb9ed1b9165427b0fdc812bc9c48c031f77da
+F src/vdbe.c d8df062f9b24a5cb83348ca2c14ff211a321a092
 F src/vdbe.h b7bfa7b468fcad2cf1890969fe7459325da00385
-F src/vdbeInt.h 1a5c604f33a5d46c839fee0cab16743aa3e1bc2e
-F src/vdbeapi.c e80d6d9dea792bd823cb64ae05cba446a7b3556a
-F src/vdbeaux.c e3228efe9460dccdc92a0ef4f38a7147166226da
+F src/vdbeInt.h 062d6e86551ffad25056f3e154fbe5a02e4d8cce
+F src/vdbeapi.c 647d65813a5595c7f667b9f43d119ecd8d70be08
+F src/vdbeaux.c 0ee1dc808fe245bc85988c12478582d666351330
 F src/vdbeblob.c a2809461743e0b9dd9be871149ac65e8d2c80c08
-F src/vdbemem.c 20e349d2ca928802fc8f2d42a2cc488fd6981d3f
+F src/vdbemem.c 0e69351b2c6ff7d8b638688c0ae336a26befa6b2
 F src/vdbesort.c 9d83601f9d6243fe70dd0169a2820c5ddfd48147
-F src/vdbetrace.c e7ec40e1999ff3c6414424365d5941178966dcbc
+F src/vdbetrace.c f7eb148eb3b4fa3401b20024630dcb43d322e73c
 F src/vtab.c 21b932841e51ebd7d075e2d0ad1415dce8d2d5fd
 F src/wal.c 7dc3966ef98b74422267e7e6e46e07ff6c6eb1b4
 F src/wal.h df01efe09c5cb8c8e391ff1715cca294f89668a4
 F src/walker.c e9e593d5bb798c3e67fc3893dfe7055c9e7d8d74
-F src/where.c e6a4e713abe6f995495ea53dd6a5e48f88b53883
+F src/where.c b8f3aab1e5843012895b89a183dcdd6cef0708db
 F src/whereInt.h 96a75c61f1d2b9d4a8e4bb17d89deb0cf7cba358
 F test/8_3_names.test ebbb5cd36741350040fd28b432ceadf495be25b2
 F test/aggerror.test a867e273ef9e3d7919f03ef4f0e8c0d2767944f2
@@ -378,7 +378,7 @@ F test/btreefault.test c2bcb542685eea44621275cfedbd8a13f65201e3
 F test/busy.test 76b4887f8b9160ba903c1ac22e8ff406ad6ae2f0
 F test/cache.test 13bc046b26210471ca6f2889aceb1ea52dc717de
 F test/capi2.test 011c16da245fdc0106a2785035de6b242c05e738
-F test/capi3.test 56ab450125ead38846cbae7e5b6a216686c3cffa
+F test/capi3.test f5eab498a0927d498e6d75c14567addb995ceccb
 F test/capi3b.test efb2b9cfd127efa84433cd7a2d72ce0454ae0dc4
 F test/capi3c.test 93d24621c9ff84da9da060f30431e0453db1cdb0
 F test/capi3d.test 6d0fc0a86d73f42dd19a7d8b7761ab9bc02277d0
@@ -591,7 +591,7 @@ F test/func.test 00667bbeac044d007f6f021af1b9f6150f0c7ff8
 F test/func2.test 772d66227e4e6684b86053302e2d74a2500e1e0f
 F test/func3.test dbccee9133cfef1473c59ec07b5f0262b9d72f9a
 F test/func4.test 6beacdfcb0e18c358e6c2dcacf1b65d1fa80955f
-F test/func5.test 1435dd313c0bae70d6af089c97a2a997fc5d0e53
+F test/func5.test cdd224400bc3e48d891827cc913a57051a426fa4
 F test/fuzz-oss1.test 4912e528ec9cf2f42134456933659d371c9e0d74
 F test/fuzz.test 77fd50afc12847af50fcf1941679d90adebadde6
 F test/fuzz2.test 207d0f9d06db3eaf47a6b7bfc835b8e2fc397167
@@ -740,6 +740,7 @@ F test/oserror.test 50417780d0e0d7cd23cf12a8277bb44024765df3
 F test/pager1.test 1acbdb14c5952a72dd43129cabdbf69aaa3ed1fa
 F test/pager2.test 67b8f40ae98112bcdba1f2b2d03ea83266418c71
 F test/pager3.test 3856d9c80839be0668efee1b74811b1b7f7fc95f
+F test/pager4.test b40ecb4cc7dff957ee7916e41ab21d1ed702a642
 F test/pagerfault.test 7285379906ab2f1108b8e82bbdf2d386cc8ff3ff
 F test/pagerfault2.test caf4c7facb914fd3b03a17b31ae2b180c8d6ca1f
 F test/pagerfault3.test 1003fcda009bf48a8e22a516e193b6ef0dd1bbd8
@@ -818,7 +819,7 @@ F test/shell1.test e7c0b9ebda25d5e78f0a3ea0dc4e31bb6d8098c0
 F test/shell2.test e1d3790f064e50b2f973502f45750012667486df
 F test/shell3.test 5e8545ec72c4413a0e8d4c6be56496e3c257ca29
 F test/shell4.test aa4eef8118b412d1a01477a53426ece169ea86a9
-F test/shell5.test 46c8c18d62732415c4fe084816c13d559831705e
+F test/shell5.test cee83b4385f842fec1f2a0bec9ea811f35386edf
 F test/shortread1.test bb591ef20f0fd9ed26d0d12e80eee6d7ac8897a3
 F test/shrink.test 8c70f62b6e8eb4d54533de6d65bd06b1b9a17868
 F test/sidedelete.test f0ad71abe6233e3b153100f3b8d679b19a488329
@@ -835,7 +836,7 @@ F test/speed3.test d32043614c08c53eafdc80f33191d5bd9b920523
 F test/speed4.test abc0ad3399dcf9703abed2fff8705e4f8e416715
 F test/speed4p.explain 6b5f104ebeb34a038b2f714150f51d01143e59aa
 F test/speed4p.test 0e51908951677de5a969b723e03a27a1c45db38b
-F test/speedtest1.c 4f1e34b6af9af0b59ca11b57d62c3cd851990fba
+F test/speedtest1.c bb3a4cc62b6cf29f5bc72c85d2bee5991e207be7
 F test/spellfix.test 8c40b169b104086d8795781f670ba3c786d6d8be
 F test/sqllimits1.test b1aae27cc98eceb845e7f7adf918561256e31298
 F test/stat.test c8eccfe8fcd3f3cfc864ce22d5b9e803a3c69940
@@ -855,7 +856,7 @@ F test/tclsqlite.test a7308276aad2e6c0bfb5b0414424dd0d9cc0cad7
 F test/tempdb.test 19d0f66e2e3eeffd68661a11c83ba5e6ace9128c
 F test/temptable.test d2c9b87a54147161bcd1822e30c1d1cd891e5b30
 F test/temptrigger.test 8ec228b0db5d7ebc4ee9b458fc28cb9e7873f5e1
-F test/tester.tcl f1316f88470a06db624fae39d5279ce21ed49652
+F test/tester.tcl 1b1ba4c0f5e7f76c7c74dbb8a20ad9f72a3f46f0
 F test/thread001.test 9f22fd3525a307ff42a326b6bc7b0465be1745a5
 F test/thread002.test e630504f8a06c00bf8bbe68528774dd96aeb2e58
 F test/thread003.test ee4c9efc3b86a6a2767516a37bd64251272560a7
@@ -1102,7 +1103,7 @@ F test/wherelimit.test 5e9fd41e79bb2b2d588ed999d641d9c965619b31
 F test/wild001.test bca33f499866f04c24510d74baf1e578d4e44b1c
 F test/win32heap.test ea19770974795cff26e11575e12d422dbd16893c
 F test/win32lock.test 7a6bd73a5dcdee39b5bb93e92395e1773a194361
-F test/win32longpath.test e2aafc07e6990fe86c69be22a3d1a0e210cd329b
+F test/win32longpath.test 169c75a3b2e43481f4a62122510210c67b08f26d
 F test/without_rowid1.test aaa26da19d543cd8d3d2d0e686dfa255556c15c8
 F test/without_rowid2.test af260339f79d13cb220288b67cd287fbcf81ad99
 F test/without_rowid3.test eac3d5c8a1924725b58503a368f2cbd24fd6c8a0
@@ -1156,11 +1157,11 @@ F tool/stack_usage.tcl f8e71b92cdb099a147dad572375595eae55eca43
 F tool/symbols-mingw.sh 4dbcea7e74768305384c9fd2ed2b41bbf9f0414d
 F tool/symbols.sh c5a617b8c61a0926747a56c65f5671ef8ac0e148
 F tool/tostr.awk e75472c2f98dd76e06b8c9c1367f4ab07e122d06
-F tool/vdbe-compress.tcl f12c884766bd14277f4fcedcae07078011717381
+F tool/vdbe-compress.tcl 0cf56e9263a152b84da86e75a5c0cdcdb7a47891
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh d1a6de74685f360ab718efda6265994b99bbea01
 F tool/win/sqlite.vsix 030f3eeaf2cb811a3692ab9c14d021a75ce41fff
-P a2914d6b17358de05eb39f764c0c13d2d4cf8f3b 27392118af4c38c5203a04b8013e1afdb1cebd0d
-R 69ae16677deb75edc22ded28f7bb30e5
+P e579661a7950fe9f8eb10012946100c874ba54b0 5716fc2341ddd8cf64139e7168597f864da4e10b
+R 44ea540ed51c079699ffafd30e405197
 U drh
-Z 5c635bf114a19e035a1d251cc9d8650c
+Z a4d623448ba4efed34874461e572fbbf
diff --git a/manifest.uuid b/manifest.uuid
index 08ac41ad95..75bdc105ef 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-e579661a7950fe9f8eb10012946100c874ba54b0
\ No newline at end of file
+32477642d79615fb85680bdac812ad9655cf6902
\ No newline at end of file
diff --git a/src/backup.c b/src/backup.c
index 1bac821f3f..4a6bc7493c 100644
--- a/src/backup.c
+++ b/src/backup.c
@@ -526,7 +526,7 @@ int sqlite3_backup_step(sqlite3_backup *p, int nPage){
 
           /* Sync the database file to disk. */
           if( rc==SQLITE_OK ){
-            rc = sqlite3PagerSync(pDestPager);
+            rc = sqlite3PagerSync(pDestPager, 0);
           }
         }else{
           sqlite3PagerTruncateImage(pDestPager, nDestTruncate);
@@ -601,10 +601,10 @@ int sqlite3_backup_finish(sqlite3_backup *p){
 
   /* Set the error code of the destination database handle. */
   rc = (p->rc==SQLITE_DONE) ? SQLITE_OK : p->rc;
-  sqlite3Error(p->pDestDb, rc, 0);
-
-  /* Exit the mutexes and free the backup context structure. */
   if( p->pDestDb ){
+    sqlite3Error(p->pDestDb, rc, 0);
+
+    /* Exit the mutexes and free the backup context structure. */
     sqlite3LeaveMutexAndCloseZombie(p->pDestDb);
   }
   sqlite3BtreeLeave(p->pSrc);
diff --git a/src/btree.c b/src/btree.c
index 30fdf4256f..20bed057e1 100644
--- a/src/btree.c
+++ b/src/btree.c
@@ -1652,7 +1652,7 @@ static int getAndInitPage(
     rc = SQLITE_CORRUPT_BKPT;
   }else{
     rc = btreeGetPage(pBt, pgno, ppPage, bReadonly);
-    if( rc==SQLITE_OK ){
+    if( rc==SQLITE_OK && (*ppPage)->isInit==0 ){
       rc = btreeInitPage(*ppPage);
       if( rc!=SQLITE_OK ){
         releasePage(*ppPage);
@@ -1673,10 +1673,11 @@ static void releasePage(MemPage *pPage){
   if( pPage ){
     assert( pPage->aData );
     assert( pPage->pBt );
+    assert( pPage->pDbPage!=0 );
     assert( sqlite3PagerGetExtra(pPage->pDbPage) == (void*)pPage );
     assert( sqlite3PagerGetData(pPage->pDbPage)==pPage->aData );
     assert( sqlite3_mutex_held(pPage->pBt->mutex) );
-    sqlite3PagerUnref(pPage->pDbPage);
+    sqlite3PagerUnrefNotNull(pPage->pDbPage);
   }
 }
 
@@ -4192,10 +4193,10 @@ int sqlite3BtreeData(BtCursor *pCur, u32 offset, u32 amt, void *pBuf){
 /*
 ** Return a pointer to payload information from the entry that the 
 ** pCur cursor is pointing to.  The pointer is to the beginning of
-** the key if skipKey==0 and it points to the beginning of data if
-** skipKey==1.  The number of bytes of available key/data is written
-** into *pAmt.  If *pAmt==0, then the value returned will not be
-** a valid pointer.
+** the key if index btrees (pPage->intKey==0) and is the data for
+** table btrees (pPage->intKey==1). The number of bytes of available
+** key/data is written into *pAmt.  If *pAmt==0, then the value
+** returned will not be a valid pointer.
 **
 ** This routine is an optimization.  It is common for the entire key
 ** and data to fit on the local page and for there to be no overflow
@@ -4208,41 +4209,21 @@ int sqlite3BtreeData(BtCursor *pCur, u32 offset, u32 amt, void *pBuf){
 ** page of the database.  The data might change or move the next time
 ** any btree routine is called.
 */
-static const unsigned char *fetchPayload(
+static const void *fetchPayload(
   BtCursor *pCur,      /* Cursor pointing to entry to read from */
-  u32 *pAmt,           /* Write the number of available bytes here */
-  int skipKey          /* read beginning at data if this is true */
+  u32 *pAmt            /* Write the number of available bytes here */
 ){
-  unsigned char *aPayload;
-  MemPage *pPage;
-  u32 nKey;
-  u32 nLocal;
-
   assert( pCur!=0 && pCur->iPage>=0 && pCur->apPage[pCur->iPage]);
   assert( pCur->eState==CURSOR_VALID );
+  assert( sqlite3_mutex_held(pCur->pBtree->db->mutex) );
   assert( cursorHoldsMutex(pCur) );
-  pPage = pCur->apPage[pCur->iPage];
-  assert( pCur->aiIdx[pCur->iPage]<pPage->nCell );
+  assert( pCur->aiIdx[pCur->iPage]<pCur->apPage[pCur->iPage]->nCell );
   if( pCur->info.nSize==0 ){
     btreeParseCell(pCur->apPage[pCur->iPage], pCur->aiIdx[pCur->iPage],
                    &pCur->info);
   }
-  aPayload = pCur->info.pCell;
-  aPayload += pCur->info.nHeader;
-  if( pPage->intKey ){
-    nKey = 0;
-  }else{
-    nKey = (int)pCur->info.nKey;
-  }
-  if( skipKey ){
-    aPayload += nKey;
-    nLocal = pCur->info.nLocal - nKey;
-  }else{
-    nLocal = pCur->info.nLocal;
-    assert( nLocal<=nKey );
-  }
-  *pAmt = nLocal;
-  return aPayload;
+  *pAmt = pCur->info.nLocal;
+  return (void*)(pCur->info.pCell + pCur->info.nHeader);
 }
 
 
@@ -4261,22 +4242,10 @@ static const unsigned char *fetchPayload(
 ** in the common case where no overflow pages are used.
 */
 const void *sqlite3BtreeKeyFetch(BtCursor *pCur, u32 *pAmt){
-  const void *p = 0;
-  assert( sqlite3_mutex_held(pCur->pBtree->db->mutex) );
-  assert( cursorHoldsMutex(pCur) );
-  if( ALWAYS(pCur->eState==CURSOR_VALID) ){
-    p = (const void*)fetchPayload(pCur, pAmt, 0);
-  }
-  return p;
+  return fetchPayload(pCur, pAmt);
 }
 const void *sqlite3BtreeDataFetch(BtCursor *pCur, u32 *pAmt){
-  const void *p = 0;
-  assert( sqlite3_mutex_held(pCur->pBtree->db->mutex) );
-  assert( cursorHoldsMutex(pCur) );
-  if( ALWAYS(pCur->eState==CURSOR_VALID) ){
-    p = (const void*)fetchPayload(pCur, pAmt, 1);
-  }
-  return p;
+  return fetchPayload(pCur, pAmt);
 }
 
 
@@ -4395,8 +4364,6 @@ static void moveToParent(BtCursor *pCur){
 static int moveToRoot(BtCursor *pCur){
   MemPage *pRoot;
   int rc = SQLITE_OK;
-  Btree *p = pCur->pBtree;
-  BtShared *pBt = p->pBt;
 
   assert( cursorHoldsMutex(pCur) );
   assert( CURSOR_INVALID < CURSOR_REQUIRESEEK );
@@ -4411,16 +4378,12 @@ static int moveToRoot(BtCursor *pCur){
   }
 
   if( pCur->iPage>=0 ){
-    int i;
-    for(i=1; i<=pCur->iPage; i++){
-      releasePage(pCur->apPage[i]);
-    }
-    pCur->iPage = 0;
+    while( pCur->iPage ) releasePage(pCur->apPage[pCur->iPage--]);
   }else if( pCur->pgnoRoot==0 ){
     pCur->eState = CURSOR_INVALID;
     return SQLITE_OK;
   }else{
-    rc = getAndInitPage(pBt, pCur->pgnoRoot, &pCur->apPage[0],
+    rc = getAndInitPage(pCur->pBtree->pBt, pCur->pgnoRoot, &pCur->apPage[0],
                         pCur->wrFlag==0 ? PAGER_GET_READONLY : 0);
     if( rc!=SQLITE_OK ){
       pCur->eState = CURSOR_INVALID;
@@ -4453,14 +4416,16 @@ static int moveToRoot(BtCursor *pCur){
   pCur->atLast = 0;
   pCur->validNKey = 0;
 
-  if( pRoot->nCell==0 && !pRoot->leaf ){
+  if( pRoot->nCell>0 ){
+    pCur->eState = CURSOR_VALID;
+  }else if( !pRoot->leaf ){
     Pgno subpage;
     if( pRoot->pgno!=1 ) return SQLITE_CORRUPT_BKPT;
     subpage = get4byte(&pRoot->aData[pRoot->hdrOffset+8]);
     pCur->eState = CURSOR_VALID;
     rc = moveToChild(pCur, subpage);
   }else{
-    pCur->eState = ((pRoot->nCell>0)?CURSOR_VALID:CURSOR_INVALID);
+    pCur->eState = CURSOR_INVALID;
   }
   return rc;
 }
@@ -4716,9 +4681,7 @@ int sqlite3BtreeMovetoUnpacked(
         ** 2 bytes of the cell.
         */
         nCell = pCell[0];
-        if( nCell<=pPage->max1bytePayload
-         /* && (pCell+nCell)<pPage->aDataEnd */
-        ){
+        if( nCell<=pPage->max1bytePayload ){
           /* This branch runs if the record-size field of the cell is a
           ** single byte varint and the record fits entirely on the main
           ** b-tree page.  */
@@ -4726,7 +4689,6 @@ int sqlite3BtreeMovetoUnpacked(
           c = sqlite3VdbeRecordCompare(nCell, (void*)&pCell[1], pIdxKey);
         }else if( !(pCell[1] & 0x80) 
           && (nCell = ((nCell&0x7f)<<7) + pCell[1])<=pPage->maxLocal
-          /* && (pCell+nCell+2)<=pPage->aDataEnd */
         ){
           /* The record-size field is a 2 byte varint and the record 
           ** fits entirely on the main b-tree page.  */
@@ -5550,7 +5512,7 @@ static int fillInCell(
     nHeader += 4;
   }
   if( pPage->hasData ){
-    nHeader += putVarint(&pCell[nHeader], nData+nZero);
+    nHeader += putVarint32(&pCell[nHeader], nData+nZero);
   }else{
     nData = nZero = 0;
   }
@@ -5678,7 +5640,6 @@ static void dropCell(MemPage *pPage, int idx, int sz, int *pRC){
   u32 pc;         /* Offset to cell content of cell being deleted */
   u8 *data;       /* pPage->aData */
   u8 *ptr;        /* Used to move bytes around within data[] */
-  u8 *endPtr;     /* End of loop */
   int rc;         /* The return code */
   int hdr;        /* Beginning of the header.  0 most pages.  100 page 1 */
 
@@ -5703,13 +5664,8 @@ static void dropCell(MemPage *pPage, int idx, int sz, int *pRC){
     *pRC = rc;
     return;
   }
-  endPtr = &pPage->aCellIdx[2*pPage->nCell - 2];
-  assert( (SQLITE_PTR_TO_INT(ptr)&1)==0 );  /* ptr is always 2-byte aligned */
-  while( ptr<endPtr ){
-    *(u16*)ptr = *(u16*)&ptr[2];
-    ptr += 2;
-  }
   pPage->nCell--;
+  memmove(ptr, ptr+2, 2*(pPage->nCell - idx));
   put2byte(&data[hdr+3], pPage->nCell);
   pPage->nFree += 2;
 }
@@ -5746,9 +5702,6 @@ static void insertCell(
   int ins;          /* Index in data[] where new cell pointer is inserted */
   int cellOffset;   /* Address of first cell pointer in data[] */
   u8 *data;         /* The content of the whole page */
-  u8 *ptr;          /* Used for moving information around in data[] */
-  u8 *endPtr;       /* End of the loop */
-
   int nSkip = (iChild ? 4 : 0);
 
   if( *pRC ) return;
@@ -5799,13 +5752,7 @@ static void insertCell(
     if( iChild ){
       put4byte(&data[idx], iChild);
     }
-    ptr = &data[end];
-    endPtr = &data[ins];
-    assert( (SQLITE_PTR_TO_INT(ptr)&1)==0 );  /* ptr is always 2-byte aligned */
-    while( ptr>endPtr ){
-      *(u16*)ptr = *(u16*)&ptr[-2];
-      ptr -= 2;
-    }
+    memmove(&data[ins+2], &data[ins], end-ins);
     put2byte(&data[ins], idx);
     put2byte(&data[pPage->hdrOffset+3], pPage->nCell);
 #ifndef SQLITE_OMIT_AUTOVACUUM
@@ -7767,7 +7714,7 @@ static void checkAppendMsg(
     sqlite3StrAccumAppend(&pCheck->errMsg, "\n", 1);
   }
   if( zMsg1 ){
-    sqlite3StrAccumAppend(&pCheck->errMsg, zMsg1, -1);
+    sqlite3StrAccumAppendAll(&pCheck->errMsg, zMsg1);
   }
   sqlite3VXPrintf(&pCheck->errMsg, 1, zFormat, ap);
   va_end(ap);
diff --git a/src/build.c b/src/build.c
index fd512358bc..c83ce57cfa 100644
--- a/src/build.c
+++ b/src/build.c
@@ -3989,9 +3989,9 @@ void sqlite3UniqueConstraint(
   for(j=0; j<pIdx->nKeyCol; j++){
     char *zCol = pTab->aCol[pIdx->aiColumn[j]].zName;
     if( j ) sqlite3StrAccumAppend(&errMsg, ", ", 2);
-    sqlite3StrAccumAppend(&errMsg, pTab->zName, -1);
+    sqlite3StrAccumAppendAll(&errMsg, pTab->zName);
     sqlite3StrAccumAppend(&errMsg, ".", 1);
-    sqlite3StrAccumAppend(&errMsg, zCol, -1);
+    sqlite3StrAccumAppendAll(&errMsg, zCol);
   }
   zErr = sqlite3StrAccumFinish(&errMsg);
   sqlite3HaltConstraint(pParse, 
@@ -4183,8 +4183,9 @@ KeyInfo *sqlite3KeyInfoOfIndex(Parse *pParse, Index *pIdx){
       assert( sqlite3KeyInfoIsWriteable(pKey) );
       for(i=0; i<nCol; i++){
         char *zColl = pIdx->azColl[i];
-        if( NEVER(zColl==0) ) zColl = "BINARY";
-        pKey->aColl[i] = sqlite3LocateCollSeq(pParse, zColl);
+        assert( zColl!=0 );
+        pKey->aColl[i] = strcmp(zColl,"BINARY")==0 ? 0 :
+                          sqlite3LocateCollSeq(pParse, zColl);
         pKey->aSortOrder[i] = pIdx->aSortOrder[i];
       }
       if( pParse->nErr ){
diff --git a/src/callback.c b/src/callback.c
index 66fa490894..260fe806bb 100644
--- a/src/callback.c
+++ b/src/callback.c
@@ -357,7 +357,6 @@ FuncDef *sqlite3FindFunction(
 
   assert( nArg>=(-2) );
   assert( nArg>=(-1) || createFlag==0 );
-  assert( enc==SQLITE_UTF8 || enc==SQLITE_UTF16LE || enc==SQLITE_UTF16BE );
   h = (sqlite3UpperToLower[(u8)zName[0]] + nName) % ArraySize(db->aFunc.a);
 
   /* First search for a match amongst the application-defined functions.
diff --git a/src/func.c b/src/func.c
index 46c606ac06..951af97b35 100644
--- a/src/func.c
+++ b/src/func.c
@@ -1511,11 +1511,11 @@ static void groupConcatStep(
         zSep = ",";
         nSep = 1;
       }
-      sqlite3StrAccumAppend(pAccum, zSep, nSep);
+      if( nSep ) sqlite3StrAccumAppend(pAccum, zSep, nSep);
     }
     zVal = (char*)sqlite3_value_text(argv[0]);
     nVal = sqlite3_value_bytes(argv[0]);
-    sqlite3StrAccumAppend(pAccum, zVal, nVal);
+    if( nVal ) sqlite3StrAccumAppend(pAccum, zVal, nVal);
   }
 }
 static void groupConcatFinalize(sqlite3_context *context){
diff --git a/src/main.c b/src/main.c
index 7c8f1739f9..c62aa36481 100644
--- a/src/main.c
+++ b/src/main.c
@@ -588,7 +588,8 @@ static int setupLookaside(sqlite3 *db, void *pBuf, int sz, int cnt){
     db->lookaside.bEnabled = 1;
     db->lookaside.bMalloced = pBuf==0 ?1:0;
   }else{
-    db->lookaside.pEnd = 0;
+    db->lookaside.pStart = db;
+    db->lookaside.pEnd = db;
     db->lookaside.bEnabled = 0;
     db->lookaside.bMalloced = 0;
   }
@@ -986,9 +987,7 @@ void sqlite3LeaveMutexAndCloseZombie(sqlite3 *db){
 #endif
 
   sqlite3Error(db, SQLITE_OK, 0); /* Deallocates any cached error strings. */
-  if( db->pErr ){
-    sqlite3ValueFree(db->pErr);
-  }
+  sqlite3ValueFree(db->pErr);
   sqlite3CloseExtensions(db);
 
   db->magic = SQLITE_MAGIC_ERROR;
@@ -1086,6 +1085,7 @@ const char *sqlite3ErrName(int rc){
       case SQLITE_READONLY_RECOVERY:  zName = "SQLITE_READONLY_RECOVERY"; break;
       case SQLITE_READONLY_CANTLOCK:  zName = "SQLITE_READONLY_CANTLOCK"; break;
       case SQLITE_READONLY_ROLLBACK:  zName = "SQLITE_READONLY_ROLLBACK"; break;
+      case SQLITE_READONLY_DBMOVED:   zName = "SQLITE_READONLY_DBMOVED";  break;
       case SQLITE_INTERRUPT:          zName = "SQLITE_INTERRUPT";         break;
       case SQLITE_IOERR:              zName = "SQLITE_IOERR";             break;
       case SQLITE_IOERR_READ:         zName = "SQLITE_IOERR_READ";        break;
@@ -1370,6 +1370,7 @@ int sqlite3CreateFunc(
 ){
   FuncDef *p;
   int nName;
+  int extraFlags;
 
   assert( sqlite3_mutex_held(db->mutex) );
   if( zFunctionName==0 ||
@@ -1380,6 +1381,10 @@ int sqlite3CreateFunc(
       (255<(nName = sqlite3Strlen30( zFunctionName))) ){
     return SQLITE_MISUSE_BKPT;
   }
+
+  assert( SQLITE_FUNC_CONSTANT==SQLITE_DETERMINISTIC );
+  extraFlags = enc &  SQLITE_DETERMINISTIC;
+  enc &= (SQLITE_FUNC_ENCMASK|SQLITE_ANY);
   
 #ifndef SQLITE_OMIT_UTF16
   /* If SQLITE_UTF16 is specified as the encoding type, transform this
@@ -1393,10 +1398,10 @@ int sqlite3CreateFunc(
     enc = SQLITE_UTF16NATIVE;
   }else if( enc==SQLITE_ANY ){
     int rc;
-    rc = sqlite3CreateFunc(db, zFunctionName, nArg, SQLITE_UTF8,
+    rc = sqlite3CreateFunc(db, zFunctionName, nArg, SQLITE_UTF8|extraFlags,
          pUserData, xFunc, xStep, xFinal, pDestructor);
     if( rc==SQLITE_OK ){
-      rc = sqlite3CreateFunc(db, zFunctionName, nArg, SQLITE_UTF16LE,
+      rc = sqlite3CreateFunc(db, zFunctionName, nArg, SQLITE_UTF16LE|extraFlags,
           pUserData, xFunc, xStep, xFinal, pDestructor);
     }
     if( rc!=SQLITE_OK ){
@@ -1439,7 +1444,8 @@ int sqlite3CreateFunc(
     pDestructor->nRef++;
   }
   p->pDestructor = pDestructor;
-  p->funcFlags &= SQLITE_FUNC_ENCMASK;
+  p->funcFlags = (p->funcFlags & SQLITE_FUNC_ENCMASK) | extraFlags;
+  testcase( p->funcFlags & SQLITE_DETERMINISTIC );
   p->xFunc = xFunc;
   p->xStep = xStep;
   p->xFinalize = xFinal;
@@ -1890,6 +1896,7 @@ const char *sqlite3_errmsg(sqlite3 *db){
   if( db->mallocFailed ){
     z = sqlite3ErrStr(SQLITE_NOMEM);
   }else{
+    testcase( db->pErr==0 );
     z = (char*)sqlite3_value_text(db->pErr);
     assert( !db->mallocFailed );
     if( z==0 ){
@@ -1931,8 +1938,7 @@ const void *sqlite3_errmsg16(sqlite3 *db){
   }else{
     z = sqlite3_value_text16(db->pErr);
     if( z==0 ){
-      sqlite3ValueSetStr(db->pErr, -1, sqlite3ErrStr(db->errCode),
-           SQLITE_UTF8, SQLITE_STATIC);
+      sqlite3Error(db, db->errCode, sqlite3ErrStr(db->errCode));
       z = sqlite3_value_text16(db->pErr);
     }
     /* A malloc() may have failed within the call to sqlite3_value_text16()
@@ -2646,8 +2652,6 @@ static int openDatabase(
   }
 #endif
 
-  sqlite3Error(db, rc, 0);
-
   /* -DSQLITE_DEFAULT_LOCKING_MODE=1 makes EXCLUSIVE the default locking
   ** mode.  -DSQLITE_DEFAULT_LOCKING_MODE=0 make NORMAL the default locking
   ** mode.  Doing nothing at all also makes NORMAL the default.
diff --git a/src/malloc.c b/src/malloc.c
index 799f0485d4..9c11d07767 100644
--- a/src/malloc.c
+++ b/src/malloc.c
@@ -433,7 +433,7 @@ void sqlite3ScratchFree(void *p){
 */
 #ifndef SQLITE_OMIT_LOOKASIDE
 static int isLookaside(sqlite3 *db, void *p){
-  return p && p>=db->lookaside.pStart && p<db->lookaside.pEnd;
+  return p>=db->lookaside.pStart && p<db->lookaside.pEnd;
 }
 #else
 #define isLookaside(A,B) 0
@@ -449,8 +449,9 @@ int sqlite3MallocSize(void *p){
   return sqlite3GlobalConfig.m.xSize(p);
 }
 int sqlite3DbMallocSize(sqlite3 *db, void *p){
-  assert( db==0 || sqlite3_mutex_held(db->mutex) );
-  if( db && isLookaside(db, p) ){
+  assert( db!=0 );
+  assert( sqlite3_mutex_held(db->mutex) );
+  if( isLookaside(db, p) ){
     return db->lookaside.sz;
   }else{
     assert( sqlite3MemdebugHasType(p, MEMTYPE_DB) );
diff --git a/src/os_unix.c b/src/os_unix.c
index ab657dc7bd..485b32fd90 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -1315,6 +1315,15 @@ static int findInodeInfo(
   return SQLITE_OK;
 }
 
+/*
+** Return TRUE if pFile has been renamed or unlinked since it was first opened.
+*/
+static int fileHasMoved(unixFile *pFile){
+  struct stat buf;
+  return pFile->pInode!=0 &&
+         (osStat(pFile->zPath, &buf)!=0 || buf.st_ino!=pFile->pInode->fileId.ino);
+}
+
 
 /*
 ** Check a unixFile that is a database.  Verify the following:
@@ -1349,10 +1358,7 @@ static void verifyDbFile(unixFile *pFile){
     pFile->ctrlFlags |= UNIXFILE_WARNED;
     return;
   }
-  if( pFile->pInode!=0
-   && ((rc = osStat(pFile->zPath, &buf))!=0
-       || buf.st_ino!=pFile->pInode->fileId.ino)
-  ){
+  if( fileHasMoved(pFile) ){
     sqlite3_log(SQLITE_WARNING, "file renamed while open: %s", pFile->zPath);
     pFile->ctrlFlags |= UNIXFILE_WARNED;
     return;
@@ -3801,6 +3807,10 @@ static int unixFileControl(sqlite3_file *id, int op, void *pArg){
       }
       return SQLITE_OK;
     }
+    case SQLITE_FCNTL_HAS_MOVED: {
+      *(int*)pArg = fileHasMoved(pFile);
+      return SQLITE_OK;
+    }
 #if SQLITE_MAX_MMAP_SIZE>0
     case SQLITE_FCNTL_MMAP_SIZE: {
       i64 newLimit = *(i64*)pArg;
diff --git a/src/os_win.c b/src/os_win.c
index 22052a3fe7..faa60569c9 100644
--- a/src/os_win.c
+++ b/src/os_win.c
@@ -3119,7 +3119,7 @@ static int winFileControl(sqlite3_file *id, int op, void *pArg){
       return SQLITE_OK;
     }
     case SQLITE_FCNTL_VFSNAME: {
-      *(char**)pArg = sqlite3_mprintf("win32");
+      *(char**)pArg = sqlite3_mprintf("%s", pFile->pVfs->zName);
       OSTRACE(("FCNTL file=%p, rc=SQLITE_OK\n", pFile->h));
       return SQLITE_OK;
     }
diff --git a/src/pager.c b/src/pager.c
index d675b85821..954ba7f1e5 100644
--- a/src/pager.c
+++ b/src/pager.c
@@ -1024,15 +1024,12 @@ static char *print_pager_state(Pager *p){
 static int subjRequiresPage(PgHdr *pPg){
   Pager *pPager = pPg->pPager;
   PagerSavepoint *p;
-  Pgno pgno;
+  Pgno pgno = pPg->pgno;
   int i;
-  if( pPager->nSavepoint ){
-    pgno = pPg->pgno;
-    for(i=0; i<pPager->nSavepoint; i++){
-      p = &pPager->aSavepoint[i];
-      if( p->nOrig>=pgno && 0==sqlite3BitvecTest(p->pInSavepoint, pgno) ){
-        return 1;
-      }
+  for(i=0; i<pPager->nSavepoint; i++){
+    p = &pPager->aSavepoint[i];
+    if( p->nOrig>=pgno && 0==sqlite3BitvecTest(p->pInSavepoint, pgno) ){
+      return 1;
     }
   }
   return 0;
@@ -1041,8 +1038,8 @@ static int subjRequiresPage(PgHdr *pPg){
 /*
 ** Return true if the page is already in the journal file.
 */
-static int pageInJournal(PgHdr *pPg){
-  return sqlite3BitvecTest(pPg->pPager->pInJournal, pPg->pgno);
+static int pageInJournal(Pager *pPager, PgHdr *pPg){
+  return sqlite3BitvecTest(pPager->pInJournal, pPg->pgno);
 }
 
 /*
@@ -1249,6 +1246,7 @@ static int readMasterJournal(sqlite3_file *pJrnl, char *zMaster, u32 nMaster){
    || szJ<16
    || SQLITE_OK!=(rc = read32bits(pJrnl, szJ-16, &len))
    || len>=nMaster 
+   || len==0 
    || SQLITE_OK!=(rc = read32bits(pJrnl, szJ-12, &cksum))
    || SQLITE_OK!=(rc = sqlite3OsRead(pJrnl, aMagic, 8, szJ-8))
    || memcmp(aMagic, aJournalMagic, 8)
@@ -1989,7 +1987,7 @@ static int pager_end_transaction(Pager *pPager, int hasMaster, int bCommit){
     PgHdr *p = pager_lookup(pPager, 1);
     if( p ){
       p->pageHash = 0;
-      sqlite3PagerUnref(p);
+      sqlite3PagerUnrefNotNull(p);
     }
   }
 #endif
@@ -2018,6 +2016,11 @@ static int pager_end_transaction(Pager *pPager, int hasMaster, int bCommit){
     rc = pager_truncate(pPager, pPager->dbSize);
   }
 
+  if( rc==SQLITE_OK && bCommit && isOpen(pPager->fd) ){
+    rc = sqlite3OsFileControl(pPager->fd, SQLITE_FCNTL_COMMIT_PHASETWO, 0);
+    if( rc==SQLITE_NOTFOUND ) rc = SQLITE_OK;
+  }
+
   if( !pPager->exclusiveMode 
    && (!pagerUseWal(pPager) || sqlite3WalExclusiveMode(pPager->pWal, 0))
   ){
@@ -2831,7 +2834,7 @@ end_playback:
   if( rc==SQLITE_OK
    && (pPager->eState>=PAGER_WRITER_DBMOD || pPager->eState==PAGER_OPEN)
   ){
-    rc = sqlite3PagerSync(pPager);
+    rc = sqlite3PagerSync(pPager, 0);
   }
   if( rc==SQLITE_OK ){
     rc = pager_end_transaction(pPager, zMaster[0]!='\0', 0);
@@ -2977,7 +2980,7 @@ static int pagerUndoCallback(void *pCtx, Pgno iPg){
       if( rc==SQLITE_OK ){
         pPager->xReiniter(pPg);
       }
-      sqlite3PagerUnref(pPg);
+      sqlite3PagerUnrefNotNull(pPg);
     }
   }
 
@@ -4332,7 +4335,7 @@ static int subjournalPage(PgHdr *pPg){
     assert( isOpen(pPager->jfd) || pagerUseWal(pPager) );
     assert( isOpen(pPager->sjfd) || pPager->nSubRec==0 );
     assert( pagerUseWal(pPager) 
-         || pageInJournal(pPg) 
+         || pageInJournal(pPager, pPg) 
          || pPg->pgno>pPager->dbOrigSize 
     );
     rc = openSubJournal(pPager);
@@ -4797,6 +4800,30 @@ int sqlite3PagerOpen(
 }
 
 
+/* Verify that the database file has not be deleted or renamed out from
+** under the pager.  Return SQLITE_OK if the database is still were it ought
+** to be on disk.  Return non-zero (SQLITE_READONLY_DBMOVED or some other error
+** code from sqlite3OsAccess()) if the database has gone missing.
+*/
+static int databaseIsUnmoved(Pager *pPager){
+  int bHasMoved = 0;
+  int rc;
+
+  if( pPager->tempFile ) return SQLITE_OK;
+  if( pPager->dbSize==0 ) return SQLITE_OK;
+  assert( pPager->zFilename && pPager->zFilename[0] );
+  rc = sqlite3OsFileControl(pPager->fd, SQLITE_FCNTL_HAS_MOVED, &bHasMoved);
+  if( rc==SQLITE_NOTFOUND ){
+    /* If the HAS_MOVED file-control is unimplemented, assume that the file
+    ** has not been moved.  That is the historical behavior of SQLite: prior to
+    ** version 3.8.3, it never checked */
+    rc = SQLITE_OK;
+  }else if( rc==SQLITE_OK && bHasMoved ){
+    rc = SQLITE_READONLY_DBMOVED;
+  }
+  return rc;
+}
+
 
 /*
 ** This function is called after transitioning from PAGER_UNLOCK to
@@ -5268,7 +5295,7 @@ int sqlite3PagerAcquire(
       if( rc!=SQLITE_OK ) goto pager_acquire_err;
     }
 
-    if( iFrame==0 && bMmapOk ){
+    if( bMmapOk && iFrame==0 ){
       void *pData = 0;
 
       rc = sqlite3OsFetch(pPager->fd, 
@@ -5409,16 +5436,19 @@ DbPage *sqlite3PagerLookup(Pager *pPager, Pgno pgno){
 ** are released, a rollback occurs and the lock on the database is
 ** removed.
 */
-void sqlite3PagerUnref(DbPage *pPg){
-  if( pPg ){
-    Pager *pPager = pPg->pPager;
-    if( pPg->flags & PGHDR_MMAP ){
-      pagerReleaseMapPage(pPg);
-    }else{
-      sqlite3PcacheRelease(pPg);
-    }
-    pagerUnlockIfUnused(pPager);
+void sqlite3PagerUnrefNotNull(DbPage *pPg){
+  Pager *pPager;
+  assert( pPg!=0 );
+  pPager = pPg->pPager;
+  if( pPg->flags & PGHDR_MMAP ){
+    pagerReleaseMapPage(pPg);
+  }else{
+    sqlite3PcacheRelease(pPg);
   }
+  pagerUnlockIfUnused(pPager);
+}
+void sqlite3PagerUnref(DbPage *pPg){
+  if( pPg ) sqlite3PagerUnrefNotNull(pPg);
 }
 
 /*
@@ -5473,13 +5503,19 @@ static int pager_open_journal(Pager *pPager){
             (SQLITE_OPEN_DELETEONCLOSE|SQLITE_OPEN_TEMP_JOURNAL):
             (SQLITE_OPEN_MAIN_JOURNAL)
           );
-  #ifdef SQLITE_ENABLE_ATOMIC_WRITE
-        rc = sqlite3JournalOpen(
-            pVfs, pPager->zJournal, pPager->jfd, flags, jrnlBufferSize(pPager)
-        );
-  #else
-        rc = sqlite3OsOpen(pVfs, pPager->zJournal, pPager->jfd, flags, 0);
-  #endif
+
+        /* Verify that the database still has the same name as it did when
+        ** it was originally opened. */
+        rc = databaseIsUnmoved(pPager);
+        if( rc==SQLITE_OK ){
+#ifdef SQLITE_ENABLE_ATOMIC_WRITE
+          rc = sqlite3JournalOpen(
+              pVfs, pPager->zJournal, pPager->jfd, flags, jrnlBufferSize(pPager)
+          );
+#else
+          rc = sqlite3OsOpen(pVfs, pPager->zJournal, pPager->jfd, flags, 0);
+#endif
+        }
       }
       assert( rc!=SQLITE_OK || isOpen(pPager->jfd) );
     }
@@ -5600,9 +5636,9 @@ int sqlite3PagerBegin(Pager *pPager, int exFlag, int subjInMemory){
 ** of any open savepoints as appropriate.
 */
 static int pager_write(PgHdr *pPg){
-  void *pData = pPg->pData;
   Pager *pPager = pPg->pPager;
   int rc = SQLITE_OK;
+  int inJournal;
 
   /* This routine is not called unless a write-transaction has already 
   ** been started. The journal file may or may not be open at this point.
@@ -5613,14 +5649,8 @@ static int pager_write(PgHdr *pPg){
        || pPager->eState==PAGER_WRITER_DBMOD
   );
   assert( assert_pager_state(pPager) );
-
-  /* If an error has been previously detected, report the same error
-  ** again. This should not happen, but the check provides robustness. */
-  if( NEVER(pPager->errCode) )  return pPager->errCode;
-
-  /* Higher-level routines never call this function if database is not
-  ** writable.  But check anyway, just for robustness. */
-  if( NEVER(pPager->readOnly) ) return SQLITE_PERM;
+  assert( pPager->errCode==0 );
+  assert( pPager->readOnly==0 );
 
   CHECK_PAGE(pPg);
 
@@ -5644,7 +5674,8 @@ static int pager_write(PgHdr *pPg){
   ** to the journal then we can return right away.
   */
   sqlite3PcacheMakeDirty(pPg);
-  if( pageInJournal(pPg) && !subjRequiresPage(pPg) ){
+  inJournal = pageInJournal(pPager, pPg);
+  if( inJournal && (pPager->nSavepoint==0 || !subjRequiresPage(pPg)) ){
     assert( !pagerUseWal(pPager) );
   }else{
   
@@ -5652,7 +5683,7 @@ static int pager_write(PgHdr *pPg){
     ** EXCLUSIVE lock on the main database file.  Write the current page to
     ** the transaction journal if it is not there already.
     */
-    if( !pageInJournal(pPg) && !pagerUseWal(pPager) ){
+    if( !inJournal && !pagerUseWal(pPager) ){
       assert( pagerUseWal(pPager)==0 );
       if( pPg->pgno<=pPager->dbOrigSize && isOpen(pPager->jfd) ){
         u32 cksum;
@@ -5665,7 +5696,7 @@ static int pager_write(PgHdr *pPg){
         assert( pPg->pgno!=PAGER_MJ_PGNO(pPager) );
 
         assert( pPager->journalHdr<=pPager->journalOff );
-        CODEC2(pPager, pData, pPg->pgno, 7, return SQLITE_NOMEM, pData2);
+        CODEC2(pPager, pPg->pData, pPg->pgno, 7, return SQLITE_NOMEM, pData2);
         cksum = pager_cksum(pPager, (u8*)pData2);
 
         /* Even if an IO or diskfull error occurs while journalling the
@@ -5717,7 +5748,7 @@ static int pager_write(PgHdr *pPg){
     ** the statement journal format differs from the standard journal format
     ** in that it omits the checksums and the header.
     */
-    if( subjRequiresPage(pPg) ){
+    if( pPager->nSavepoint>0 && subjRequiresPage(pPg) ){
       rc = subjournalPage(pPg);
     }
   }
@@ -5749,19 +5780,19 @@ int sqlite3PagerWrite(DbPage *pDbPage){
 
   PgHdr *pPg = pDbPage;
   Pager *pPager = pPg->pPager;
-  Pgno nPagePerSector = (pPager->sectorSize/pPager->pageSize);
 
   assert( (pPg->flags & PGHDR_MMAP)==0 );
   assert( pPager->eState>=PAGER_WRITER_LOCKED );
   assert( pPager->eState!=PAGER_ERROR );
   assert( assert_pager_state(pPager) );
 
-  if( nPagePerSector>1 ){
+  if( pPager->sectorSize > (u32)pPager->pageSize ){
     Pgno nPageCount;          /* Total number of pages in database file */
     Pgno pg1;                 /* First page of the sector pPg is located on. */
     int nPage = 0;            /* Number of pages starting at pg1 to journal */
     int ii;                   /* Loop counter */
     int needSync = 0;         /* True if any page has PGHDR_NEED_SYNC */
+    Pgno nPagePerSector = (pPager->sectorSize/pPager->pageSize);
 
     /* Set the doNotSpill NOSYNC bit to 1. This is because we cannot allow
     ** a journal header to be written between the pages journaled by
@@ -5800,14 +5831,14 @@ int sqlite3PagerWrite(DbPage *pDbPage){
             if( pPage->flags&PGHDR_NEED_SYNC ){
               needSync = 1;
             }
-            sqlite3PagerUnref(pPage);
+            sqlite3PagerUnrefNotNull(pPage);
           }
         }
       }else if( (pPage = pager_lookup(pPager, pg))!=0 ){
         if( pPage->flags&PGHDR_NEED_SYNC ){
           needSync = 1;
         }
-        sqlite3PagerUnref(pPage);
+        sqlite3PagerUnrefNotNull(pPage);
       }
     }
 
@@ -5823,7 +5854,7 @@ int sqlite3PagerWrite(DbPage *pDbPage){
         PgHdr *pPage = pager_lookup(pPager, pg1+ii);
         if( pPage ){
           pPage->flags |= PGHDR_NEED_SYNC;
-          sqlite3PagerUnref(pPage);
+          sqlite3PagerUnrefNotNull(pPage);
         }
       }
     }
@@ -5976,17 +6007,17 @@ static int pager_incr_changecounter(Pager *pPager, int isDirectMode){
 ** If successful, or if called on a pager for which it is a no-op, this
 ** function returns SQLITE_OK. Otherwise, an IO error code is returned.
 */
-int sqlite3PagerSync(Pager *pPager){
+int sqlite3PagerSync(Pager *pPager, const char *zMaster){
   int rc = SQLITE_OK;
-  if( !pPager->noSync ){
+
+  if( isOpen(pPager->fd) ){
+    void *pArg = (void*)zMaster;
+    rc = sqlite3OsFileControl(pPager->fd, SQLITE_FCNTL_SYNC, pArg);
+    if( rc==SQLITE_NOTFOUND ) rc = SQLITE_OK;
+  }
+  if( rc==SQLITE_OK && !pPager->noSync ){
     assert( !MEMDB );
     rc = sqlite3OsSync(pPager->fd, pPager->syncFlags);
-  }else if( isOpen(pPager->fd) ){
-    assert( !MEMDB );
-    rc = sqlite3OsFileControl(pPager->fd, SQLITE_FCNTL_SYNC_OMITTED, 0);
-    if( rc==SQLITE_NOTFOUND ){
-      rc = SQLITE_OK;
-    }
   }
   return rc;
 }
@@ -6185,7 +6216,7 @@ int sqlite3PagerCommitPhaseOne(
   
       /* Finally, sync the database file. */
       if( !noSync ){
-        rc = sqlite3PagerSync(pPager);
+        rc = sqlite3PagerSync(pPager, zMaster);
       }
       IOTRACE(("DBSYNC %p\n", pPager))
     }
@@ -6314,7 +6345,9 @@ int sqlite3PagerRollback(Pager *pPager){
 
   assert( pPager->eState==PAGER_READER || rc!=SQLITE_OK );
   assert( rc==SQLITE_OK || rc==SQLITE_FULL || rc==SQLITE_CORRUPT
-          || rc==SQLITE_NOMEM || (rc&0xFF)==SQLITE_IOERR );
+          || rc==SQLITE_NOMEM || (rc&0xFF)==SQLITE_IOERR 
+          || rc==SQLITE_CANTOPEN
+  );
 
   /* If an error occurs during a ROLLBACK, we can no longer trust the pager
   ** cache. So call pager_error() on the way out to make any error persistent.
@@ -6717,7 +6750,7 @@ int sqlite3PagerMovepage(Pager *pPager, DbPage *pPg, Pgno pgno, int isCommit){
   if( (pPg->flags&PGHDR_NEED_SYNC) && !isCommit ){
     needSyncPgno = pPg->pgno;
     assert( pPager->journalMode==PAGER_JOURNALMODE_OFF ||
-            pageInJournal(pPg) || pPg->pgno>pPager->dbOrigSize );
+            pageInJournal(pPager, pPg) || pPg->pgno>pPager->dbOrigSize );
     assert( pPg->flags&PGHDR_DIRTY );
   }
 
@@ -6751,7 +6784,7 @@ int sqlite3PagerMovepage(Pager *pPager, DbPage *pPg, Pgno pgno, int isCommit){
   if( MEMDB ){
     assert( pPgOld );
     sqlite3PcacheMove(pPgOld, origPgno);
-    sqlite3PagerUnref(pPgOld);
+    sqlite3PagerUnrefNotNull(pPgOld);
   }
 
   if( needSyncPgno ){
@@ -6780,7 +6813,7 @@ int sqlite3PagerMovepage(Pager *pPager, DbPage *pPg, Pgno pgno, int isCommit){
     }
     pPgHdr->flags |= PGHDR_NEED_SYNC;
     sqlite3PcacheMakeDirty(pPgHdr);
-    sqlite3PagerUnref(pPgHdr);
+    sqlite3PagerUnrefNotNull(pPgHdr);
   }
 
   return SQLITE_OK;
diff --git a/src/pager.h b/src/pager.h
index 7851d28345..c9ca8553b9 100644
--- a/src/pager.h
+++ b/src/pager.h
@@ -136,6 +136,7 @@ int sqlite3PagerAcquire(Pager *pPager, Pgno pgno, DbPage **ppPage, int clrFlag);
 DbPage *sqlite3PagerLookup(Pager *pPager, Pgno pgno);
 void sqlite3PagerRef(DbPage*);
 void sqlite3PagerUnref(DbPage*);
+void sqlite3PagerUnrefNotNull(DbPage*);
 
 /* Operations on page references. */
 int sqlite3PagerWrite(DbPage*);
@@ -150,7 +151,7 @@ void sqlite3PagerPagecount(Pager*, int*);
 int sqlite3PagerBegin(Pager*, int exFlag, int);
 int sqlite3PagerCommitPhaseOne(Pager*,const char *zMaster, int);
 int sqlite3PagerExclusiveLock(Pager*);
-int sqlite3PagerSync(Pager *pPager);
+int sqlite3PagerSync(Pager *pPager, const char *zMaster);
 int sqlite3PagerCommitPhaseTwo(Pager*);
 int sqlite3PagerRollback(Pager*);
 int sqlite3PagerOpenSavepoint(Pager *pPager, int n);
diff --git a/src/pcache1.c b/src/pcache1.c
index df9d877537..f173e23fe3 100644
--- a/src/pcache1.c
+++ b/src/pcache1.c
@@ -96,6 +96,7 @@ struct PCache1 {
 struct PgHdr1 {
   sqlite3_pcache_page page;
   unsigned int iKey;             /* Key value (page number) */
+  u8 isPinned;                   /* Page in use, not on the LRU list */
   PgHdr1 *pNext;                 /* Next in hash table chain */
   PCache1 *pCache;               /* Cache that currently owns this page */
   PgHdr1 *pLruNext;              /* Next in LRU list of unpinned pages */
@@ -424,34 +425,32 @@ static int pcache1ResizeHash(PCache1 *p){
 ** LRU list, then this function is a no-op.
 **
 ** The PGroup mutex must be held when this function is called.
-**
-** If pPage is NULL then this routine is a no-op.
 */
 static void pcache1PinPage(PgHdr1 *pPage){
   PCache1 *pCache;
   PGroup *pGroup;
 
-  if( pPage==0 ) return;
+  assert( pPage!=0 );
+  assert( pPage->isPinned==0 );
   pCache = pPage->pCache;
   pGroup = pCache->pGroup;
+  assert( pPage->pLruNext || pPage==pGroup->pLruTail );
+  assert( pPage->pLruPrev || pPage==pGroup->pLruHead );
   assert( sqlite3_mutex_held(pGroup->mutex) );
-  if( pPage->pLruNext || pPage==pGroup->pLruTail ){
-    if( pPage->pLruPrev ){
-      pPage->pLruPrev->pLruNext = pPage->pLruNext;
-    }
-    if( pPage->pLruNext ){
-      pPage->pLruNext->pLruPrev = pPage->pLruPrev;
-    }
-    if( pGroup->pLruHead==pPage ){
-      pGroup->pLruHead = pPage->pLruNext;
-    }
-    if( pGroup->pLruTail==pPage ){
-      pGroup->pLruTail = pPage->pLruPrev;
-    }
-    pPage->pLruNext = 0;
-    pPage->pLruPrev = 0;
-    pPage->pCache->nRecyclable--;
+  if( pPage->pLruPrev ){
+    pPage->pLruPrev->pLruNext = pPage->pLruNext;
+  }else{
+    pGroup->pLruHead = pPage->pLruNext;
   }
+  if( pPage->pLruNext ){
+    pPage->pLruNext->pLruPrev = pPage->pLruPrev;
+  }else{
+    pGroup->pLruTail = pPage->pLruPrev;
+  }
+  pPage->pLruNext = 0;
+  pPage->pLruPrev = 0;
+  pPage->isPinned = 1;
+  pCache->nRecyclable--;
 }
 
 
@@ -483,6 +482,7 @@ static void pcache1EnforceMaxPage(PGroup *pGroup){
   while( pGroup->nCurrentPage>pGroup->nMaxPage && pGroup->pLruTail ){
     PgHdr1 *p = pGroup->pLruTail;
     assert( p->pCache->pGroup==pGroup );
+    assert( p->isPinned==0 );
     pcache1PinPage(p);
     pcache1RemoveFromHash(p);
     pcache1FreePage(p);
@@ -510,7 +510,7 @@ static void pcache1TruncateUnsafe(
       if( pPage->iKey>=iLimit ){
         pCache->nPage--;
         *pp = pPage->pNext;
-        pcache1PinPage(pPage);
+        if( !pPage->isPinned ) pcache1PinPage(pPage);
         pcache1FreePage(pPage);
       }else{
         pp = &pPage->pNext;
@@ -733,8 +733,11 @@ static sqlite3_pcache_page *pcache1Fetch(
   }
 
   /* Step 2: Abort if no existing page is found and createFlag is 0 */
-  if( pPage || createFlag==0 ){
-    pcache1PinPage(pPage);
+  if( pPage ){
+    if( !pPage->isPinned ) pcache1PinPage(pPage);
+    goto fetch_out;
+  }
+  if( createFlag==0 ){
     goto fetch_out;
   }
 
@@ -775,6 +778,7 @@ static sqlite3_pcache_page *pcache1Fetch(
   )){
     PCache1 *pOther;
     pPage = pGroup->pLruTail;
+    assert( pPage->isPinned==0 );
     pcache1RemoveFromHash(pPage);
     pcache1PinPage(pPage);
     pOther = pPage->pCache;
@@ -811,6 +815,7 @@ static sqlite3_pcache_page *pcache1Fetch(
     pPage->pCache = pCache;
     pPage->pLruPrev = 0;
     pPage->pLruNext = 0;
+    pPage->isPinned = 1;
     *(void **)pPage->page.pExtra = 0;
     pCache->apHash[h] = pPage;
   }
@@ -846,6 +851,7 @@ static void pcache1Unpin(
   */
   assert( pPage->pLruPrev==0 && pPage->pLruNext==0 );
   assert( pGroup->pLruHead!=pPage && pGroup->pLruTail!=pPage );
+  assert( pPage->isPinned==1 );
 
   if( reuseUnlikely || pGroup->nCurrentPage>pGroup->nMaxPage ){
     pcache1RemoveFromHash(pPage);
@@ -861,6 +867,7 @@ static void pcache1Unpin(
       pGroup->pLruHead = pPage;
     }
     pCache->nRecyclable++;
+    pPage->isPinned = 0;
   }
 
   pcache1LeaveMutex(pCache->pGroup);
@@ -987,6 +994,7 @@ int sqlite3PcacheReleaseMemory(int nReq){
 #ifdef SQLITE_PCACHE_SEPARATE_HEADER
       nFree += sqlite3MemSize(p);
 #endif
+      assert( p->isPinned==0 );
       pcache1PinPage(p);
       pcache1RemoveFromHash(p);
       pcache1FreePage(p);
@@ -1011,6 +1019,7 @@ void sqlite3PcacheStats(
   PgHdr1 *p;
   int nRecyclable = 0;
   for(p=pcache1.grp.pLruHead; p; p=p->pLruNext){
+    assert( p->isPinned==0 );
     nRecyclable++;
   }
   *pnCurrent = pcache1.grp.nCurrentPage;
diff --git a/src/printf.c b/src/printf.c
index f9e5c6406d..3279a54f21 100644
--- a/src/printf.c
+++ b/src/printf.c
@@ -148,6 +148,14 @@ void sqlite3AppendSpace(StrAccum *pAccum, int N){
   }
 }
 
+/*
+** Set the StrAccum object to an error mode.
+*/
+void setStrAccumError(StrAccum *p, u8 eError){
+  p->accError = eError;
+  p->nAlloc = 0;
+}
+
 /*
 ** On machines with a small stack size, you can redefine the
 ** SQLITE_PRINT_BUF_SIZE to be something smaller, if desired.
@@ -359,7 +367,7 @@ void sqlite3VXPrintf(
           nOut = precision + 10;
           zOut = zExtra = sqlite3Malloc( nOut );
           if( zOut==0 ){
-            pAccum->accError = STRACCUM_NOMEM;
+            setStrAccumError(pAccum, STRACCUM_NOMEM);
             return;
           }
         }
@@ -471,7 +479,7 @@ void sqlite3VXPrintf(
         if( MAX(e2,0)+precision+width > etBUFSIZE - 15 ){
           bufpt = zExtra = sqlite3Malloc( MAX(e2,0)+precision+width+15 );
           if( bufpt==0 ){
-            pAccum->accError = STRACCUM_NOMEM;
+            setStrAccumError(pAccum, STRACCUM_NOMEM);
             return;
           }
         }
@@ -606,7 +614,7 @@ void sqlite3VXPrintf(
         if( n>etBUFSIZE ){
           bufpt = zExtra = sqlite3Malloc( n );
           if( bufpt==0 ){
-            pAccum->accError = STRACCUM_NOMEM;
+            setStrAccumError(pAccum, STRACCUM_NOMEM);
             return;
           }
         }else{
@@ -629,7 +637,7 @@ void sqlite3VXPrintf(
       }
       case etTOKEN: {
         Token *pToken = va_arg(ap, Token*);
-        if( pToken ){
+        if( pToken && pToken->n ){
           sqlite3StrAccumAppend(pAccum, (const char*)pToken->z, pToken->n);
         }
         length = width = 0;
@@ -641,10 +649,10 @@ void sqlite3VXPrintf(
         struct SrcList_item *pItem = &pSrc->a[k];
         assert( k>=0 && k<pSrc->nSrc );
         if( pItem->zDatabase ){
-          sqlite3StrAccumAppend(pAccum, pItem->zDatabase, -1);
+          sqlite3StrAccumAppendAll(pAccum, pItem->zDatabase);
           sqlite3StrAccumAppend(pAccum, ".", 1);
         }
-        sqlite3StrAccumAppend(pAccum, pItem->zName, -1);
+        sqlite3StrAccumAppendAll(pAccum, pItem->zName);
         length = width = 0;
         break;
       }
@@ -675,7 +683,7 @@ void sqlite3VXPrintf(
         sqlite3AppendSpace(pAccum, nspace);
       }
     }
-    sqlite3_free(zExtra);
+    if( zExtra ) sqlite3_free(zExtra);
   }/* End for loop over the format string */
 } /* End of function */
 
@@ -683,22 +691,20 @@ void sqlite3VXPrintf(
 ** Append N bytes of text from z to the StrAccum object.
 */
 void sqlite3StrAccumAppend(StrAccum *p, const char *z, int N){
-  assert( z!=0 || N==0 );
-  if( p->accError ){
-    testcase(p->accError==STRACCUM_TOOBIG);
-    testcase(p->accError==STRACCUM_NOMEM);
-    return;
-  }
-  assert( p->zText!=0 || p->nChar==0 );
-  if( N<=0 ){
-    if( N==0 || z[0]==0 ) return;
-    N = sqlite3Strlen30(z);
-  }
+  assert( z!=0 );
+  assert( p->zText!=0 || p->nChar==0 || p->accError );
+  assert( N>=0 );
+  assert( p->accError==0 || p->nAlloc==0 );
   if( p->nChar+N >= p->nAlloc ){
     char *zNew;
+    if( p->accError ){
+      testcase(p->accError==STRACCUM_TOOBIG);
+      testcase(p->accError==STRACCUM_NOMEM);
+      return;
+    }
     if( !p->useMalloc ){
-      p->accError = STRACCUM_TOOBIG;
       N = p->nAlloc - p->nChar - 1;
+      setStrAccumError(p, STRACCUM_TOOBIG);
       if( N<=0 ){
         return;
       }
@@ -708,7 +714,7 @@ void sqlite3StrAccumAppend(StrAccum *p, const char *z, int N){
       szNew += N + 1;
       if( szNew > p->mxAlloc ){
         sqlite3StrAccumReset(p);
-        p->accError = STRACCUM_TOOBIG;
+        setStrAccumError(p, STRACCUM_TOOBIG);
         return;
       }else{
         p->nAlloc = (int)szNew;
@@ -722,8 +728,8 @@ void sqlite3StrAccumAppend(StrAccum *p, const char *z, int N){
         if( zOld==0 && p->nChar>0 ) memcpy(zNew, p->zText, p->nChar);
         p->zText = zNew;
       }else{
-        p->accError = STRACCUM_NOMEM;
         sqlite3StrAccumReset(p);
+        setStrAccumError(p, STRACCUM_NOMEM);
         return;
       }
     }
@@ -733,6 +739,14 @@ void sqlite3StrAccumAppend(StrAccum *p, const char *z, int N){
   p->nChar += N;
 }
 
+/*
+** Append the complete text of zero-terminated string z[] to the p string.
+*/
+void sqlite3StrAccumAppendAll(StrAccum *p, const char *z){
+  sqlite3StrAccumAppend(p, z, sqlite3Strlen30(z));
+}
+
+
 /*
 ** Finish off a string by making sure it is zero-terminated.
 ** Return a pointer to the resulting string.  Return a NULL
@@ -750,7 +764,7 @@ char *sqlite3StrAccumFinish(StrAccum *p){
       if( p->zText ){
         memcpy(p->zText, p->zBase, p->nChar+1);
       }else{
-        p->accError = STRACCUM_NOMEM;
+        setStrAccumError(p, STRACCUM_NOMEM);
       }
     }
   }
diff --git a/src/shell.c b/src/shell.c
index 480ec5b455..7826fdf204 100644
--- a/src/shell.c
+++ b/src/shell.c
@@ -1836,7 +1836,7 @@ static void csv_append_char(CSVReader *p, int c){
 **   +  Report syntax errors on stderr
 */
 static char *csv_read_one_field(CSVReader *p){
-  int c, pc;
+  int c, pc, ppc;
   int cSep = p->cSeparator;
   p->n = 0;
   c = fgetc(p->in);
@@ -1847,7 +1847,7 @@ static char *csv_read_one_field(CSVReader *p){
   if( c=='"' ){
     int startLine = p->nLine;
     int cQuote = c;
-    pc = 0;
+    pc = ppc = 0;
     while( 1 ){
       c = fgetc(p->in);
       if( c=='\n' ) p->nLine++;
@@ -1859,7 +1859,7 @@ static char *csv_read_one_field(CSVReader *p){
       }
       if( (c==cSep && pc==cQuote)
        || (c=='\n' && pc==cQuote)
-       || (c=='\n' && pc=='\r' && p->n>=2 && p->z[p->n-2]==cQuote)
+       || (c=='\n' && pc=='\r' && ppc==cQuote)
        || (c==EOF && pc==cQuote)
       ){
         do{ p->n--; }while( p->z[p->n]!=cQuote );
@@ -1877,6 +1877,7 @@ static char *csv_read_one_field(CSVReader *p){
         break;
       }
       csv_append_char(p, c);
+      ppc = pc;
       pc = c;
     }
   }else{
diff --git a/src/sqlite.h.in b/src/sqlite.h.in
index f67c42a8c8..abb6904196 100644
--- a/src/sqlite.h.in
+++ b/src/sqlite.h.in
@@ -486,6 +486,7 @@ int sqlite3_exec(
 #define SQLITE_READONLY_RECOVERY       (SQLITE_READONLY | (1<<8))
 #define SQLITE_READONLY_CANTLOCK       (SQLITE_READONLY | (2<<8))
 #define SQLITE_READONLY_ROLLBACK       (SQLITE_READONLY | (3<<8))
+#define SQLITE_READONLY_DBMOVED        (SQLITE_READONLY | (4<<8))
 #define SQLITE_ABORT_ROLLBACK          (SQLITE_ABORT | (2<<8))
 #define SQLITE_CONSTRAINT_CHECK        (SQLITE_CONSTRAINT | (1<<8))
 #define SQLITE_CONSTRAINT_COMMITHOOK   (SQLITE_CONSTRAINT | (2<<8))
@@ -553,7 +554,8 @@ int sqlite3_exec(
 ** after reboot following a crash or power loss, the only bytes in a
 ** file that were written at the application level might have changed
 ** and that adjacent bytes, even bytes within the same sector are
-** guaranteed to be unchanged.
+** guaranteed to be unchanged.  The SQLITE_IOCAP_UNDELETABLE_WHEN_OPEN
+** flag indicate that a file cannot be deleted when open.
 */
 #define SQLITE_IOCAP_ATOMIC                 0x00000001
 #define SQLITE_IOCAP_ATOMIC512              0x00000002
@@ -784,15 +786,29 @@ struct sqlite3_io_methods {
 ** additional information.
 **
 ** <li>[[SQLITE_FCNTL_SYNC_OMITTED]]
-** ^(The [SQLITE_FCNTL_SYNC_OMITTED] opcode is generated internally by
-** SQLite and sent to all VFSes in place of a call to the xSync method
-** when the database connection has [PRAGMA synchronous] set to OFF.)^
-** Some specialized VFSes need this signal in order to operate correctly
-** when [PRAGMA synchronous | PRAGMA synchronous=OFF] is set, but most 
-** VFSes do not need this signal and should silently ignore this opcode.
-** Applications should not call [sqlite3_file_control()] with this
-** opcode as doing so may disrupt the operation of the specialized VFSes
-** that do require it.  
+** No longer in use.
+**
+** <li>[[SQLITE_FCNTL_SYNC]]
+** The [SQLITE_FCNTL_SYNC] opcode is generated internally by SQLite and
+** sent to the VFS immediately before the xSync method is invoked on a
+** database file descriptor. Or, if the xSync method is not invoked 
+** because the user has configured SQLite with 
+** [PRAGMA synchronous | PRAGMA synchronous=OFF] it is invoked in place 
+** of the xSync method. In most cases, the pointer argument passed with
+** this file-control is NULL. However, if the database file is being synced
+** as part of a multi-database commit, the argument points to a nul-terminated
+** string containing the transactions master-journal file name. VFSes that 
+** do not need this signal should silently ignore this opcode. Applications 
+** should not call [sqlite3_file_control()] with this opcode as doing so may 
+** disrupt the operation of the specialized VFSes that do require it.  
+**
+** <li>[[SQLITE_FCNTL_COMMIT_PHASETWO]]
+** The [SQLITE_FCNTL_COMMIT_PHASETWO] opcode is generated internally by SQLite
+** and sent to the VFS after a transaction has been committed immediately
+** but before the database is unlocked. VFSes that do not need this signal
+** should silently ignore this opcode. Applications should not call
+** [sqlite3_file_control()] with this opcode as doing so may disrupt the 
+** operation of the specialized VFSes that do require it.  
 **
 ** <li>[[SQLITE_FCNTL_WIN32_AV_RETRY]]
 ** ^The [SQLITE_FCNTL_WIN32_AV_RETRY] opcode is used to configure automatic
@@ -916,6 +932,12 @@ struct sqlite3_io_methods {
 ** SQLite stack may generate instances of this file control if
 ** the [SQLITE_USE_FCNTL_TRACE] compile-time option is enabled.
 **
+** <li>[[SQLITE_FCNTL_HAS_MOVED]]
+** The [SQLITE_FCNTL_HAS_MOVED] file control interprets its argument as a
+** pointer to an integer and it writes a boolean into that integer depending
+** on whether or not the file has been renamed, moved, or deleted since it
+** was first opened.
+**
 ** </ul>
 */
 #define SQLITE_FCNTL_LOCKSTATE               1
@@ -936,6 +958,9 @@ struct sqlite3_io_methods {
 #define SQLITE_FCNTL_TEMPFILENAME           16
 #define SQLITE_FCNTL_MMAP_SIZE              18
 #define SQLITE_FCNTL_TRACE                  19
+#define SQLITE_FCNTL_HAS_MOVED              20
+#define SQLITE_FCNTL_SYNC                   21
+#define SQLITE_FCNTL_COMMIT_PHASETWO        22
 
 /*
 ** CAPI3REF: Mutex Handle
@@ -3952,15 +3977,24 @@ int sqlite3_reset(sqlite3_stmt *pStmt);
 **
 ** ^The fourth parameter, eTextRep, specifies what
 ** [SQLITE_UTF8 | text encoding] this SQL function prefers for
-** its parameters.  Every SQL function implementation must be able to work
-** with UTF-8, UTF-16le, or UTF-16be.  But some implementations may be
-** more efficient with one encoding than another.  ^An application may
-** invoke sqlite3_create_function() or sqlite3_create_function16() multiple
-** times with the same function but with different values of eTextRep.
+** its parameters.  The application should set this parameter to
+** [SQLITE_UTF16LE] if the function implementation invokes 
+** [sqlite3_value_text16le()] on an input, or [SQLITE_UTF16BE] if the
+** implementation invokes [sqlite3_value_text16be()] on an input, or
+** [SQLITE_UTF16] if [sqlite3_value_text16()] is used, or [SQLITE_UTF8]
+** otherwise.  ^The same SQL function may be registered multiple times using
+** different preferred text encodings, with different implementations for
+** each encoding.
 ** ^When multiple implementations of the same function are available, SQLite
 ** will pick the one that involves the least amount of data conversion.
-** If there is only a single implementation which does not care what text
-** encoding is used, then the fourth argument should be [SQLITE_ANY].
+**
+** ^The fourth parameter may optionally be ORed with [SQLITE_DETERMINISTIC]
+** to signal that the function will always return the same result given
+** the same inputs within a single SQL statement.  Most SQL functions are
+** deterministic.  The built-in [random()] SQL function is an example of a
+** function that is not deterministic.  The SQLite query planner is able to
+** perform additional optimizations on deterministic functions, so use
+** of the [SQLITE_DETERMINISTIC] flag is recommended where possible.
 **
 ** ^(The fifth parameter is an arbitrary pointer.  The implementation of the
 ** function can gain access to this pointer using [sqlite3_user_data()].)^
@@ -4046,9 +4080,19 @@ int sqlite3_create_function_v2(
 #define SQLITE_UTF16LE        2
 #define SQLITE_UTF16BE        3
 #define SQLITE_UTF16          4    /* Use native byte order */
-#define SQLITE_ANY            5    /* sqlite3_create_function only */
+#define SQLITE_ANY            5    /* Deprecated */
 #define SQLITE_UTF16_ALIGNED  8    /* sqlite3_create_collation only */
 
+/*
+** CAPI3REF: Function Flags
+**
+** These constants may be ORed together with the 
+** [SQLITE_UTF8 | preferred text encoding] as the fourth argument
+** to [sqlite3_create_function()], [sqlite3_create_function16()], or
+** [sqlite3_create_function_v2()].
+*/
+#define SQLITE_DETERMINISTIC    0x800
+
 /*
 ** CAPI3REF: Deprecated Functions
 ** DEPRECATED
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index 0c4159e622..98dc451a4a 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -3169,6 +3169,7 @@ const void *sqlite3ValueText(sqlite3_value*, u8);
 int sqlite3ValueBytes(sqlite3_value*, u8);
 void sqlite3ValueSetStr(sqlite3_value*, int, const void *,u8, 
                         void(*)(void*));
+void sqlite3ValueSetNull(sqlite3_value*);
 void sqlite3ValueFree(sqlite3_value*);
 sqlite3_value *sqlite3ValueNew(sqlite3 *);
 char *sqlite3Utf16to8(sqlite3 *, const void*, int, u8);
@@ -3234,6 +3235,7 @@ int sqlite3OpenTempDatabase(Parse *);
 
 void sqlite3StrAccumInit(StrAccum*, char*, int, int);
 void sqlite3StrAccumAppend(StrAccum*,const char*,int);
+void sqlite3StrAccumAppendAll(StrAccum*,const char*);
 void sqlite3AppendSpace(StrAccum*,int);
 char *sqlite3StrAccumFinish(StrAccum*);
 void sqlite3StrAccumReset(StrAccum*);
diff --git a/src/test1.c b/src/test1.c
index e0c16e13ae..a96b298661 100644
--- a/src/test1.c
+++ b/src/test1.c
@@ -942,9 +942,21 @@ static void ptrChngFunction(
   sqlite3_result_int(context, p1!=p2);
 }
 
+/*
+** This SQL function returns a different answer each time it is called, even if
+** the arguments are the same.
+*/
+static void nondeterministicFunction(
+  sqlite3_context *context, 
+  int argc,  
+  sqlite3_value **argv
+){
+  static int cnt = 0;
+  sqlite3_result_int(context, cnt++);
+}
 
 /*
-** Usage:  sqlite_test_create_function DB
+** Usage:  sqlite3_create_function DB
 **
 ** Call the sqlite3_create_function API on the given database in order
 ** to create a function named "x_coalesce".  This function does the same thing
@@ -973,16 +985,16 @@ static int test_create_function(
     return TCL_ERROR;
   }
   if( getDbPointer(interp, argv[1], &db) ) return TCL_ERROR;
-  rc = sqlite3_create_function(db, "x_coalesce", -1, SQLITE_ANY, 0, 
+  rc = sqlite3_create_function(db, "x_coalesce", -1, SQLITE_UTF8, 0, 
         t1_ifnullFunc, 0, 0);
   if( rc==SQLITE_OK ){
-    rc = sqlite3_create_function(db, "hex8", 1, SQLITE_ANY, 0, 
-          hex8Func, 0, 0);
+    rc = sqlite3_create_function(db, "hex8", 1, SQLITE_UTF8 | SQLITE_DETERMINISTIC,
+          0, hex8Func, 0, 0);
   }
 #ifndef SQLITE_OMIT_UTF16
   if( rc==SQLITE_OK ){
-    rc = sqlite3_create_function(db, "hex16", 1, SQLITE_ANY, 0, 
-          hex16Func, 0, 0);
+    rc = sqlite3_create_function(db, "hex16", 1, SQLITE_UTF16 | SQLITE_DETERMINISTIC,
+          0, hex16Func, 0, 0);
   }
 #endif
   if( rc==SQLITE_OK ){
@@ -994,6 +1006,19 @@ static int test_create_function(
           ptrChngFunction, 0, 0);
   }
 
+  /* Functions counter1() and counter2() have the same implementation - they
+  ** both return an ascending integer with each call.  But counter1() is marked
+  ** as non-deterministic and counter2() is marked as deterministic.
+  */
+  if( rc==SQLITE_OK ){
+    rc = sqlite3_create_function(db, "counter1", -1, SQLITE_UTF8,
+          0, nondeterministicFunction, 0, 0);
+  }
+  if( rc==SQLITE_OK ){
+    rc = sqlite3_create_function(db, "counter2", -1, SQLITE_UTF8|SQLITE_DETERMINISTIC,
+          0, nondeterministicFunction, 0, 0);
+  }
+
 #ifndef SQLITE_OMIT_UTF16
   /* Use the sqlite3_create_function16() API here. Mainly for fun, but also 
   ** because it is not tested anywhere else. */
diff --git a/src/test6.c b/src/test6.c
index 6ea03b0f1c..306482dcd3 100644
--- a/src/test6.c
+++ b/src/test6.c
@@ -173,9 +173,6 @@ static void *crash_realloc(void *p, int n){
 static int writeDbFile(CrashFile *p, u8 *z, i64 iAmt, i64 iOff){
   int rc = SQLITE_OK;
   int iSkip = 0;
-  if( iOff==PENDING_BYTE && (p->flags&SQLITE_OPEN_MAIN_DB) ){
-    iSkip = 512;
-  }
   if( (iAmt-iSkip)>0 ){
     rc = sqlite3OsWrite(p->pRealFile, &z[iSkip], (int)(iAmt-iSkip), iOff+iSkip);
   }
@@ -409,13 +406,17 @@ static int cfRead(
   sqlite_int64 iOfst
 ){
   CrashFile *pCrash = (CrashFile *)pFile;
+  int nCopy = (int)MIN((i64)iAmt, (pCrash->iSize - iOfst));
+
+  if( nCopy>0 ){
+    memcpy(zBuf, &pCrash->zData[iOfst], nCopy);
+  }
 
   /* Check the file-size to see if this is a short-read */
-  if( pCrash->iSize<(iOfst+iAmt) ){
+  if( nCopy<iAmt ){
     return SQLITE_IOERR_SHORT_READ;
   }
 
-  memcpy(zBuf, &pCrash->zData[iOfst], iAmt);
   return SQLITE_OK;
 }
 
@@ -632,14 +633,12 @@ static int cfOpen(
       ** UPDATE: It also contains an assert() verifying that each call
       ** to the xRead() method reads less than 128KB of data.
       */
-      const int isDb = (flags&SQLITE_OPEN_MAIN_DB);
       i64 iOff;
 
       memset(pWrapper->zData, 0, pWrapper->nData);
       for(iOff=0; iOff<pWrapper->iSize; iOff += 512){
         int nRead = (int)(pWrapper->iSize - iOff);
         if( nRead>512 ) nRead = 512;
-        if( isDb && iOff==PENDING_BYTE ) continue;
         rc = sqlite3OsRead(pReal, &pWrapper->zData[iOff], nRead, iOff);
       }
     }else{
diff --git a/src/test_vfstrace.c b/src/test_vfstrace.c
index 0aacc01fe4..c1792f116e 100644
--- a/src/test_vfstrace.c
+++ b/src/test_vfstrace.c
@@ -258,6 +258,11 @@ static void vfstrace_print_errcode(
     case SQLITE_IOERR_SHMOPEN:      zVal = "SQLITE_IOERR_SHMOPEN";      break;
     case SQLITE_IOERR_SHMSIZE:      zVal = "SQLITE_IOERR_SHMSIZE";      break;
     case SQLITE_IOERR_SHMLOCK:      zVal = "SQLITE_IOERR_SHMLOCK";      break;
+    case SQLITE_IOERR_SHMMAP:       zVal = "SQLITE_IOERR_SHMMAP";       break;
+    case SQLITE_IOERR_SEEK:         zVal = "SQLITE_IOERR_SEEK";         break;
+    case SQLITE_IOERR_GETTEMPPATH:  zVal = "SQLITE_IOERR_GETTEMPPATH";  break;
+    case SQLITE_IOERR_CONVPATH:     zVal = "SQLITE_IOERR_CONVPATH";     break;
+    case SQLITE_READONLY_DBMOVED:   zVal = "SQLITE_READONLY_DBMOVED";   break;
     case SQLITE_LOCKED_SHAREDCACHE: zVal = "SQLITE_LOCKED_SHAREDCACHE"; break;
     case SQLITE_BUSY_RECOVERY:      zVal = "SQLITE_BUSY_RECOVERY";      break;
     case SQLITE_CANTOPEN_NOTEMPDIR: zVal = "SQLITE_CANTOPEN_NOTEMPDIR"; break;
diff --git a/src/util.c b/src/util.c
index 9fa2a0fbd8..362a5d8970 100644
--- a/src/util.c
+++ b/src/util.c
@@ -115,18 +115,17 @@ int sqlite3Strlen30(const char *z){
 ** to NULL.
 */
 void sqlite3Error(sqlite3 *db, int err_code, const char *zFormat, ...){
-  if( db && (db->pErr || (db->pErr = sqlite3ValueNew(db))!=0) ){
-    db->errCode = err_code;
-    if( zFormat ){
-      char *z;
-      va_list ap;
-      va_start(ap, zFormat);
-      z = sqlite3VMPrintf(db, zFormat, ap);
-      va_end(ap);
-      sqlite3ValueSetStr(db->pErr, -1, z, SQLITE_UTF8, SQLITE_DYNAMIC);
-    }else{
-      sqlite3ValueSetStr(db->pErr, 0, 0, SQLITE_UTF8, SQLITE_STATIC);
-    }
+  assert( db!=0 );
+  db->errCode = err_code;
+  if( zFormat && (db->pErr || (db->pErr = sqlite3ValueNew(db))!=0) ){
+    char *z;
+    va_list ap;
+    va_start(ap, zFormat);
+    z = sqlite3VMPrintf(db, zFormat, ap);
+    va_end(ap);
+    sqlite3ValueSetStr(db->pErr, -1, z, SQLITE_UTF8, SQLITE_DYNAMIC);
+  }else if( db->pErr ){
+    sqlite3ValueSetNull(db->pErr);
   }
 }
 
diff --git a/src/vdbe.c b/src/vdbe.c
index 908e5bcb39..e35e324faa 100644
--- a/src/vdbe.c
+++ b/src/vdbe.c
@@ -2506,7 +2506,7 @@ case OP_Column: {
   pDest->enc = encoding;
 
 op_column_out:
-  rc = sqlite3VdbeMemMakeWriteable(pDest);
+  Deephemeralize(pDest);
 op_column_error:
   UPDATE_MAX_BLOBSIZE(pDest);
   REGISTER_TRACE(pOp->p3, pDest);
@@ -2570,7 +2570,8 @@ case OP_MakeRecord: {
   int nField;            /* Number of fields in the record */
   char *zAffinity;       /* The affinity string for the record */
   int file_format;       /* File format to use for encoding */
-  int i;                 /* Space used in zNewRecord[] */
+  int i;                 /* Space used in zNewRecord[] header */
+  int j;                 /* Space used in zNewRecord[] content */
   int len;               /* Length of a field */
 
   /* Assuming the record contains N fields, the record format looks
@@ -2604,36 +2605,51 @@ case OP_MakeRecord: {
   pOut = &aMem[pOp->p3];
   memAboutToChange(p, pOut);
 
+  /* Apply the requested affinity to all inputs
+  */
+  assert( pData0<=pLast );
+  if( zAffinity ){
+    pRec = pData0;
+    do{
+      applyAffinity(pRec, *(zAffinity++), encoding);
+    }while( (++pRec)<=pLast );
+  }
+
   /* Loop through the elements that will make up the record to figure
   ** out how much space is required for the new record.
   */
-  for(pRec=pData0; pRec<=pLast; pRec++){
+  pRec = pLast;
+  do{
     assert( memIsValid(pRec) );
-    if( zAffinity ){
-      applyAffinity(pRec, zAffinity[pRec-pData0], encoding);
-    }
-    if( pRec->flags&MEM_Zero && pRec->n>0 ){
-      sqlite3VdbeMemExpandBlob(pRec);
-    }
     serial_type = sqlite3VdbeSerialType(pRec, file_format);
     len = sqlite3VdbeSerialTypeLen(serial_type);
-    nData += len;
-    nHdr += sqlite3VarintLen(serial_type);
     if( pRec->flags & MEM_Zero ){
-      /* Only pure zero-filled BLOBs can be input to this Opcode.
-      ** We do not allow blobs with a prefix and a zero-filled tail. */
-      nZero += pRec->u.nZero;
-    }else if( len ){
-      nZero = 0;
+      if( nData ){
+        sqlite3VdbeMemExpandBlob(pRec);
+      }else{
+        nZero += pRec->u.nZero;
+        len -= pRec->u.nZero;
+      }
     }
-  }
+    nData += len;
+    testcase( serial_type==127 );
+    testcase( serial_type==128 );
+    nHdr += serial_type<=127 ? 1 : sqlite3VarintLen(serial_type);
+  }while( (--pRec)>=pData0 );
 
   /* Add the initial header varint and total the size */
-  nHdr += nVarint = sqlite3VarintLen(nHdr);
-  if( nVarint<sqlite3VarintLen(nHdr) ){
-    nHdr++;
+  testcase( nHdr==126 );
+  testcase( nHdr==127 );
+  if( nHdr<=126 ){
+    /* The common case */
+    nHdr += 1;
+  }else{
+    /* Rare case of a really large header */
+    nVarint = sqlite3VarintLen(nHdr);
+    nHdr += nVarint;
+    if( nVarint<sqlite3VarintLen(nHdr) ) nHdr++;
   }
-  nByte = nHdr+nData-nZero;
+  nByte = nHdr+nData;
   if( nByte>db->aLimit[SQLITE_LIMIT_LENGTH] ){
     goto too_big;
   }
@@ -2650,14 +2666,16 @@ case OP_MakeRecord: {
 
   /* Write the record */
   i = putVarint32(zNewRecord, nHdr);
-  for(pRec=pData0; pRec<=pLast; pRec++){
+  j = nHdr;
+  assert( pData0<=pLast );
+  pRec = pData0;
+  do{
     serial_type = sqlite3VdbeSerialType(pRec, file_format);
-    i += putVarint32(&zNewRecord[i], serial_type);      /* serial type */
-  }
-  for(pRec=pData0; pRec<=pLast; pRec++){  /* serial data */
-    i += sqlite3VdbeSerialPut(&zNewRecord[i], (int)(nByte-i), pRec,file_format);
-  }
-  assert( i==nByte );
+    i += putVarint32(&zNewRecord[i], serial_type);            /* serial type */
+    j += sqlite3VdbeSerialPut(&zNewRecord[j], pRec, serial_type); /* content */
+  }while( (++pRec)<=pLast );
+  assert( i==nHdr );
+  assert( j==nByte );
 
   assert( pOp->p3>0 && pOp->p3<=(p->nMem-p->nCursor) );
   pOut->n = (int)nByte;
@@ -2686,6 +2704,7 @@ case OP_Count: {         /* out2-prerelease */
 
   pCrsr = p->apCsr[pOp->p1]->pCursor;
   assert( pCrsr );
+  nEntry = 0;  /* Not needed.  Only used to silence a warning. */
   rc = sqlite3BtreeCount(pCrsr, &nEntry);
   pOut->u.i = nEntry;
   break;
@@ -3706,7 +3725,6 @@ case OP_Found: {        /* jump, in3 */
   if( pOp->opcode!=OP_NoConflict ) sqlite3_found_count++;
 #endif
 
-  alreadyExists = 0;
   assert( pOp->p1>=0 && pOp->p1<p->nCursor );
   assert( pOp->p4type==P4_INT32 );
   pC = p->apCsr[pOp->p1];
@@ -3714,6 +3732,7 @@ case OP_Found: {        /* jump, in3 */
   pIn3 = &aMem[pOp->p3];
   assert( pC->pCursor!=0 );
   assert( pC->isTable==0 );
+  pFree = 0;  /* Not needed.  Only used to suppress a compiler warning. */
   if( pOp->p4.i>0 ){
     r.pKeyInfo = pC->pKeyInfo;
     r.nField = (u16)pOp->p4.i;
@@ -4697,6 +4716,7 @@ case OP_IdxRowid: {              /* out2-prerelease */
   assert( pC->deferredMoveto==0 );
   assert( pC->isTable==0 );
   if( !pC->nullRow ){
+    rowid = 0;  /* Not needed.  Only used to silence a warning. */
     rc = sqlite3VdbeIdxRowid(db, pCrsr, &rowid);
     if( rc!=SQLITE_OK ){
       goto abort_due_to_error;
@@ -4760,6 +4780,7 @@ case OP_IdxGE: {        /* jump */
 #ifdef SQLITE_DEBUG
   { int i; for(i=0; i<r.nField; i++) assert( memIsValid(&r.aMem[i]) ); }
 #endif
+  res = 0;  /* Not needed.  Only used to silence a warning. */
   rc = sqlite3VdbeIdxKeyCompare(pC, &r, &res);
   if( pOp->opcode==OP_IdxLT ){
     res = -res;
@@ -4820,6 +4841,7 @@ case OP_Destroy: {     /* out2-prerelease */
     iDb = pOp->p3;
     assert( iCnt==1 );
     assert( (p->btreeMask & (((yDbMask)1)<<iDb))!=0 );
+    iMoved = 0;  /* Not needed.  Only to silence a warning. */
     rc = sqlite3BtreeDropTable(db->aDb[iDb].pBt, pOp->p1, &iMoved);
     pOut->flags = MEM_Int;
     pOut->u.i = iMoved;
@@ -5392,7 +5414,6 @@ case OP_FkIfZero: {         /* jump */
 ** an integer.
 */
 case OP_MemMax: {        /* in2 */
-  Mem *pIn1;
   VdbeFrame *pFrame;
   if( p->pFrame ){
     for(pFrame=p->pFrame; pFrame->pParent; pFrame=pFrame->pParent);
diff --git a/src/vdbeInt.h b/src/vdbeInt.h
index cf10418874..0f89c3a249 100644
--- a/src/vdbeInt.h
+++ b/src/vdbeInt.h
@@ -408,7 +408,7 @@ void sqlite3VdbePrintOp(FILE*, int, Op*);
 #endif
 u32 sqlite3VdbeSerialTypeLen(u32);
 u32 sqlite3VdbeSerialType(Mem*, int);
-u32 sqlite3VdbeSerialPut(unsigned char*, int, Mem*, int);
+u32 sqlite3VdbeSerialPut(unsigned char*, Mem*, u32);
 u32 sqlite3VdbeSerialGet(const unsigned char*, u32, Mem*);
 void sqlite3VdbeDeleteAuxData(Vdbe*, int, int);
 
diff --git a/src/vdbeapi.c b/src/vdbeapi.c
index 976a4125eb..080eee3fed 100644
--- a/src/vdbeapi.c
+++ b/src/vdbeapi.c
@@ -486,7 +486,7 @@ int sqlite3_step(sqlite3_stmt *pStmt){
     v->doingRerun = 1;
     assert( v->expired==0 );
   }
-  if( rc2!=SQLITE_OK && ALWAYS(v->isPrepareV2) && ALWAYS(db->pErr) ){
+  if( rc2!=SQLITE_OK ){
     /* This case occurs after failing to recompile an sql statement. 
     ** The error message from the SQL compiler has already been loaded 
     ** into the database handle. This block copies the error message 
@@ -496,6 +496,7 @@ int sqlite3_step(sqlite3_stmt *pStmt){
     ** sqlite3_errmsg() and sqlite3_errcode().
     */
     const char *zErr = (const char *)sqlite3_value_text(db->pErr); 
+    assert( zErr!=0 || db->mallocFailed );
     sqlite3DbFree(db, v->zErrMsg);
     if( !db->mallocFailed ){
       v->zErrMsg = sqlite3DbStrDup(db, zErr);
@@ -1332,6 +1333,7 @@ static UnpackedRecord *vdbeUnpackRecord(
 
   pRet = sqlite3VdbeAllocUnpackedRecord(pKeyInfo, 0, 0, &dummy);
   if( pRet ){
+    memset(pRet->aMem, 0, sizeof(Mem)*(pKeyInfo->nField+1));
     sqlite3VdbeRecordUnpack(pKeyInfo, nKey, pKey, pRet);
   }
   return pRet;
diff --git a/src/vdbeaux.c b/src/vdbeaux.c
index c1a22b2075..5fc7a31982 100644
--- a/src/vdbeaux.c
+++ b/src/vdbeaux.c
@@ -2421,6 +2421,7 @@ int sqlite3VdbeTransferError(Vdbe *p){
   if( p->zErrMsg ){
     u8 mallocFailed = db->mallocFailed;
     sqlite3BeginBenignMalloc();
+    if( db->pErr==0 ) db->pErr = sqlite3ValueNew(db);
     sqlite3ValueSetStr(db->pErr, -1, p->zErrMsg, SQLITE_UTF8, SQLITE_TRANSIENT);
     sqlite3EndBenignMalloc();
     db->mallocFailed = mallocFailed;
@@ -2489,8 +2490,7 @@ int sqlite3VdbeReset(Vdbe *p){
     ** to sqlite3_step(). For consistency (since sqlite3_step() was
     ** called), set the database error in this case as well.
     */
-    sqlite3Error(db, p->rc, 0);
-    sqlite3ValueSetStr(db->pErr, -1, p->zErrMsg, SQLITE_UTF8, SQLITE_TRANSIENT);
+    sqlite3Error(db, p->rc, p->zErrMsg ? "%s" : 0, p->zErrMsg);
     sqlite3DbFree(db, p->zErrMsg);
     p->zErrMsg = 0;
   }
@@ -2828,21 +2828,15 @@ static u64 floatSwap(u64 in){
 ** buf. It is assumed that the caller has allocated sufficient space.
 ** Return the number of bytes written.
 **
-** nBuf is the amount of space left in buf[].  nBuf must always be
-** large enough to hold the entire field.  Except, if the field is
-** a blob with a zero-filled tail, then buf[] might be just the right
-** size to hold everything except for the zero-filled tail.  If buf[]
-** is only big enough to hold the non-zero prefix, then only write that
-** prefix into buf[].  But if buf[] is large enough to hold both the
-** prefix and the tail then write the prefix and set the tail to all
-** zeros.
+** nBuf is the amount of space left in buf[].  The caller is responsible
+** for allocating enough space to buf[] to hold the entire field, exclusive
+** of the pMem->u.nZero bytes for a MEM_Zero value.
 **
 ** Return the number of bytes actually written into buf[].  The number
 ** of bytes in the zero-filled tail is included in the return value only
 ** if those bytes were zeroed in buf[].
 */ 
-u32 sqlite3VdbeSerialPut(u8 *buf, int nBuf, Mem *pMem, int file_format){
-  u32 serial_type = sqlite3VdbeSerialType(pMem, file_format);
+u32 sqlite3VdbeSerialPut(u8 *buf, Mem *pMem, u32 serial_type){
   u32 len;
 
   /* Integer and Real */
@@ -2857,7 +2851,6 @@ u32 sqlite3VdbeSerialPut(u8 *buf, int nBuf, Mem *pMem, int file_format){
       v = pMem->u.i;
     }
     len = i = sqlite3VdbeSerialTypeLen(serial_type);
-    assert( len<=(u32)nBuf );
     while( i-- ){
       buf[i] = (u8)(v&0xFF);
       v >>= 8;
@@ -2869,17 +2862,8 @@ u32 sqlite3VdbeSerialPut(u8 *buf, int nBuf, Mem *pMem, int file_format){
   if( serial_type>=12 ){
     assert( pMem->n + ((pMem->flags & MEM_Zero)?pMem->u.nZero:0)
              == (int)sqlite3VdbeSerialTypeLen(serial_type) );
-    assert( pMem->n<=nBuf );
     len = pMem->n;
     memcpy(buf, pMem->z, len);
-    if( pMem->flags & MEM_Zero ){
-      len += pMem->u.nZero;
-      assert( nBuf>=0 );
-      if( len > (u32)nBuf ){
-        len = (u32)nBuf;
-      }
-      memset(&buf[pMem->n], 0, len-pMem->n);
-    }
     return len;
   }
 
diff --git a/src/vdbemem.c b/src/vdbemem.c
index 51f20d4cc7..3beccd92db 100644
--- a/src/vdbemem.c
+++ b/src/vdbemem.c
@@ -59,18 +59,14 @@ int sqlite3VdbeChangeEncoding(Mem *pMem, int desiredEnc){
 
 /*
 ** Make sure pMem->z points to a writable allocation of at least 
-** n bytes.
+** min(n,32) bytes.
 **
-** If the third argument passed to this function is true, then memory
-** cell pMem must contain a string or blob. In this case the content is
-** preserved. Otherwise, if the third parameter to this function is false,
-** any current string or blob value may be discarded.
-**
-** This function sets the MEM_Dyn flag and clears any xDel callback.
-** It also clears MEM_Ephem and MEM_Static. If the preserve flag is 
-** not set, Mem.n is zeroed.
+** If the bPreserve argument is true, then copy of the content of
+** pMem->z into the new allocation.  pMem must be either a string or
+** blob if bPreserve is true.  If bPreserve is false, any prior content
+** in pMem->z is discarded.
 */
-int sqlite3VdbeMemGrow(Mem *pMem, int n, int preserve){
+int sqlite3VdbeMemGrow(Mem *pMem, int n, int bPreserve){
   assert( 1 >=
     ((pMem->zMalloc && pMem->zMalloc==pMem->z) ? 1 : 0) +
     (((pMem->flags&MEM_Dyn)&&pMem->xDel) ? 1 : 0) + 
@@ -79,37 +75,39 @@ int sqlite3VdbeMemGrow(Mem *pMem, int n, int preserve){
   );
   assert( (pMem->flags&MEM_RowSet)==0 );
 
-  /* If the preserve flag is set to true, then the memory cell must already
+  /* If the bPreserve flag is set to true, then the memory cell must already
   ** contain a valid string or blob value.  */
-  assert( preserve==0 || pMem->flags&(MEM_Blob|MEM_Str) );
+  assert( bPreserve==0 || pMem->flags&(MEM_Blob|MEM_Str) );
+  testcase( bPreserve && pMem->z==0 );
 
-  if( n<32 ) n = 32;
-  if( sqlite3DbMallocSize(pMem->db, pMem->zMalloc)<n ){
-    if( preserve && pMem->z==pMem->zMalloc ){
+  if( pMem->zMalloc==0 || sqlite3DbMallocSize(pMem->db, pMem->zMalloc)<n ){
+    if( n<32 ) n = 32;
+    if( bPreserve && pMem->z==pMem->zMalloc ){
       pMem->z = pMem->zMalloc = sqlite3DbReallocOrFree(pMem->db, pMem->z, n);
-      preserve = 0;
+      bPreserve = 0;
     }else{
       sqlite3DbFree(pMem->db, pMem->zMalloc);
       pMem->zMalloc = sqlite3DbMallocRaw(pMem->db, n);
     }
+    if( pMem->zMalloc==0 ){
+      sqlite3VdbeMemRelease(pMem);
+      pMem->flags = MEM_Null;  
+      return SQLITE_NOMEM;
+    }
   }
 
-  if( pMem->z && preserve && pMem->zMalloc && pMem->z!=pMem->zMalloc ){
+  if( pMem->z && bPreserve && pMem->z!=pMem->zMalloc ){
     memcpy(pMem->zMalloc, pMem->z, pMem->n);
   }
-  if( pMem->flags&MEM_Dyn && pMem->xDel ){
+  if( (pMem->flags&MEM_Dyn)!=0 && pMem->xDel ){
     assert( pMem->xDel!=SQLITE_DYNAMIC );
     pMem->xDel((void *)(pMem->z));
   }
 
   pMem->z = pMem->zMalloc;
-  if( pMem->z==0 ){
-    pMem->flags = MEM_Null;
-  }else{
-    pMem->flags &= ~(MEM_Ephem|MEM_Static);
-  }
+  pMem->flags &= ~(MEM_Ephem|MEM_Static);
   pMem->xDel = 0;
-  return (pMem->z ? SQLITE_OK : SQLITE_NOMEM);
+  return SQLITE_OK;
 }
 
 /*
@@ -295,10 +293,12 @@ void sqlite3VdbeMemReleaseExternal(Mem *p){
 */
 void sqlite3VdbeMemRelease(Mem *p){
   VdbeMemRelease(p);
-  sqlite3DbFree(p->db, p->zMalloc);
+  if( p->zMalloc ){
+    sqlite3DbFree(p->db, p->zMalloc);
+    p->zMalloc = 0;
+  }
   p->z = 0;
-  p->zMalloc = 0;
-  p->xDel = 0;
+  assert( p->xDel==0 );  /* Zeroed by VdbeMemRelease() above */
 }
 
 /*
@@ -482,6 +482,9 @@ void sqlite3VdbeMemSetNull(Mem *pMem){
   MemSetTypeFlag(pMem, MEM_Null);
   pMem->type = SQLITE_NULL;
 }
+void sqlite3ValueSetNull(sqlite3_value *p){
+  sqlite3VdbeMemSetNull((Mem*)p); 
+}
 
 /*
 ** Delete any previous value and set the value to be a BLOB of length
@@ -1219,7 +1222,7 @@ static void recordFunc(
   }else{
     aRet[0] = nSerial+1;
     sqlite3PutVarint(&aRet[1], iSerial);
-    sqlite3VdbeSerialPut(&aRet[1+nSerial], nVal, argv[0], file_format);
+    sqlite3VdbeSerialPut(&aRet[1+nSerial], argv[0], iSerial);
     sqlite3_result_blob(context, aRet, nRet, SQLITE_TRANSIENT);
     sqlite3DbFree(db, aRet);
   }
diff --git a/src/vdbetrace.c b/src/vdbetrace.c
index 0a767261f0..a7ff0a685d 100644
--- a/src/vdbetrace.c
+++ b/src/vdbetrace.c
@@ -92,6 +92,7 @@ char *sqlite3VdbeExpandSql(
       const char *zStart = zRawSql;
       while( *(zRawSql++)!='\n' && *zRawSql );
       sqlite3StrAccumAppend(&out, "-- ", 3);
+      assert( (zRawSql - zStart) > 0 );
       sqlite3StrAccumAppend(&out, zStart, (int)(zRawSql-zStart));
     }
   }else{
diff --git a/src/where.c b/src/where.c
index 7d3ec48dac..afe664aa02 100644
--- a/src/where.c
+++ b/src/where.c
@@ -2568,7 +2568,7 @@ static void explainAppendTerm(
   const char *zOp             /* Name of the operator */
 ){
   if( iTerm ) sqlite3StrAccumAppend(pStr, " AND ", 5);
-  sqlite3StrAccumAppend(pStr, zColumn, -1);
+  sqlite3StrAccumAppendAll(pStr, zColumn);
   sqlite3StrAccumAppend(pStr, zOp, 1);
   sqlite3StrAccumAppend(pStr, "?", 1);
 }
@@ -2614,7 +2614,7 @@ static char *explainIndexRange(sqlite3 *db, WhereLoop *pLoop, Table *pTab){
     }else{
       if( i ) sqlite3StrAccumAppend(&txt, " AND ", 5);
       sqlite3StrAccumAppend(&txt, "ANY(", 4);
-      sqlite3StrAccumAppend(&txt, z, -1);
+      sqlite3StrAccumAppendAll(&txt, z);
       sqlite3StrAccumAppend(&txt, ")", 1);
     }
   }
diff --git a/test/capi3.test b/test/capi3.test
index 9d7434d25d..2dbc298fa4 100644
--- a/test/capi3.test
+++ b/test/capi3.test
@@ -1191,6 +1191,7 @@ do_test capi3-18.2 {
   sqlite3_reset $STMT
   sqlite3_errcode db
 } {SQLITE_SCHEMA}
+breakpoint
 do_test capi3-18.3 {
   sqlite3_errmsg db
 } {database schema has changed}
diff --git a/test/func5.test b/test/func5.test
index 83ecb785db..bfd545b4e3 100644
--- a/test/func5.test
+++ b/test/func5.test
@@ -9,13 +9,15 @@
 #
 #*************************************************************************
 #
-# Verify that constant string expressions that get factored into initializing
-# code are not reused between function parameters and other values in the
-# VDBE program, as the function might have changed the encoding.
+# Testing of function factoring and the SQLITE_DETERMINISTIC flag.
 #
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
 
+# Verify that constant string expressions that get factored into initializing
+# code are not reused between function parameters and other values in the
+# VDBE program, as the function might have changed the encoding.
+#
 do_execsql_test func5-1.1 {
   PRAGMA encoding=UTF16le;
   CREATE TABLE t1(x,a,b,c);
@@ -30,4 +32,32 @@ do_execsql_test func5-1.2 {
   SELECT x FROM t1 WHERE a='abcdefg' OR c=instr('abcdefg',b) ORDER BY +x;
 } {2 4}
 
+# Verify that SQLITE_DETERMINISTIC functions get factored out of the
+# evaluation loop whereas non-deterministic functions do not.  counter1()
+# is marked as non-deterministic and so is not factored out of the loop,
+# and it really is non-deterministic, returning a different result each
+# time.  But counter2() is marked as deterministic, so it does get factored
+# out of the loop.  counter2() has the same implementation as counter1(),
+# returning a different result on each invocation, but because it is 
+# only invoked once outside of the loop, it appears to return the same
+# result multiple times.
+#
+do_execsql_test func5-2.1 {
+  CREATE TABLE t2(x,y);
+  INSERT INTO t2 VALUES(1,2),(3,4),(5,6),(7,8);
+  SELECT x, y FROM t2 WHERE x+5=5+x ORDER BY +x;
+} {1 2 3 4 5 6 7 8}
+sqlite3_create_function db
+do_execsql_test func5-2.2 {
+  SELECT x, y FROM t2
+   WHERE x+counter1('hello')=counter1('hello')+x
+   ORDER BY +x;
+} {}
+do_execsql_test func5-2.3 {
+  SELECT x, y FROM t2
+   WHERE x+counter2('hello')=counter2('hello')+x
+   ORDER BY +x;
+} {1 2 3 4 5 6 7 8}
+
+
 finish_test
diff --git a/test/pager4.test b/test/pager4.test
new file mode 100644
index 0000000000..edfd2660c2
--- /dev/null
+++ b/test/pager4.test
@@ -0,0 +1,94 @@
+# 2013-12-06
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+#
+# Tests for the SQLITE_IOERR_NODB error condition: the database file file
+# is unlinked or renamed out from under SQLite.
+#
+
+if {$tcl_platform(platform)!="unix"} return
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+# Create a database file for testing
+#
+do_execsql_test pager4-1.1 {
+  CREATE TABLE t1(a,b,c);
+  INSERT INTO t1 VALUES(673,'stone','philips');
+  SELECT * FROM t1;
+} {673 stone philips}
+
+# After renaming the database file while it is open, one can still
+# read from the database, but writing returns a READONLY error.
+#
+file delete -force test-xyz.db
+file rename test.db test-xyz.db
+do_catchsql_test pager4-1.2 {
+  SELECT * FROM t1;
+} {0 {673 stone philips}}
+do_catchsql_test pager4-1.3 {
+  UPDATE t1 SET a=537;
+} {1 {attempt to write a readonly database}}
+
+# Creating a different database file with the same name of the original
+# is detected and still leaves the database read-only.
+#
+sqlite3 db2 test.db
+db2 eval {CREATE TABLE t2(x,y,z)}
+do_catchsql_test pager4-1.4 {
+  UPDATE t1 SET a=948;
+} {1 {attempt to write a readonly database}}
+
+# Changing the name back clears the READONLY error
+#
+db2 close
+file delete -force test.db
+file rename test-xyz.db test.db
+do_catchsql_test pager4-1.5 {
+  SELECT * FROM t1;
+} {0 {673 stone philips}}
+do_catchsql_test pager4-1.6 {
+  UPDATE t1 SET a=537;
+  SELECT * FROM t1;
+} {0 {537 stone philips}}
+
+# We can write to a renamed database if journal_mode=OFF or
+# journal_mode=MEMORY.
+#
+file rename test.db test-xyz.db
+do_catchsql_test pager4-1.7 {
+  PRAGMA journal_mode=OFF;
+  UPDATE t1 SET a=107;
+  SELECT * FROM t1;
+} {0 {off 107 stone philips}}
+do_catchsql_test pager4-1.8 {
+  PRAGMA journal_mode=MEMORY;
+  UPDATE t1 SET b='magpie';
+  SELECT * FROM t1;
+} {0 {memory 107 magpie philips}}
+
+# Any other journal mode gives a READONLY error
+#
+do_catchsql_test pager4-1.9 {
+  PRAGMA journal_mode=DELETE;
+  UPDATE t1 SET c='jaguar';
+} {1 {attempt to write a readonly database}}
+do_catchsql_test pager4-1.10 {
+  PRAGMA journal_mode=TRUNCATE;
+  UPDATE t1 SET c='jaguar';
+} {1 {attempt to write a readonly database}}
+do_catchsql_test pager4-1.11 {
+  PRAGMA journal_mode=PERSIST;
+  UPDATE t1 SET c='jaguar';
+} {1 {attempt to write a readonly database}}
+
+
+finish_test
diff --git a/test/shell5.test b/test/shell5.test
index cd3d471031..ce05a303ca 100644
--- a/test/shell5.test
+++ b/test/shell5.test
@@ -268,4 +268,23 @@ do_test shell5-1.9 {
 } {1 {} 11 | 2 x 22 | 3 {"} 33 | 4 hello 44 | 5 55 {} | 6 66 x | 7 77 {"} | 8 88 hello | {} 9 99 | x 10 110 | {"} 11 121 | hello 12 132 |}
 db close
 
+# Import columns containing quoted strings
+do_test shell5-1.10 {
+  set out [open shell5.csv w]
+  fconfigure $out -translation lf
+  puts $out {column1,column2,column3,column4}
+  puts $out "field1,field2,\"x3 \"\"\r\ndata\"\" 3\",field4"
+  puts $out "x1,x2,\"x3 \"\"\ndata\"\" 3\",x4"
+  close $out
+  forcedelete test.db
+  catchcmd test.db {.mode csv
+    CREATE TABLE t1(a,b,c,d);
+.import shell5.csv t1
+  }
+  sqlite3 db test.db
+  db eval {SELECT hex(c) FROM t1 ORDER BY rowid}
+} {636F6C756D6E33 783320220D0A64617461222033 783320220A64617461222033}
+
+db close
+
 finish_test
diff --git a/test/speedtest1.c b/test/speedtest1.c
index f3e79ec816..0e6b1a99c8 100644
--- a/test/speedtest1.c
+++ b/test/speedtest1.c
@@ -665,7 +665,7 @@ void testset_main(void){
 
 
   n = sz/5;
-  speedtest1_begin_test(290, "%d four-ways joins", n);
+  speedtest1_begin_test(300, "%d four-ways joins", n);
   speedtest1_exec("BEGIN");
   speedtest1_prepare(
     "SELECT t1.c FROM t1, t2, t3, t4\n"
diff --git a/test/tester.tcl b/test/tester.tcl
index 2dcbd2f0f3..74a5a30ba0 100644
--- a/test/tester.tcl
+++ b/test/tester.tcl
@@ -1257,6 +1257,7 @@ proc crashsql {args} {
   set blocksize ""
   set crashdelay 1
   set prngseed 0
+  set opendb { sqlite3 db test.db -vfs crash }
   set tclbody {}
   set crashfile ""
   set dc ""
@@ -1268,6 +1269,7 @@ proc crashsql {args} {
     set z2 [lindex $args [expr $ii+1]]
 
     if     {$n>1 && [string first $z -delay]==0}     {set crashdelay $z2} \
+    elseif {$n>1 && [string first $z -opendb]==0}    {set opendb $z2} \
     elseif {$n>1 && [string first $z -seed]==0}      {set prngseed $z2} \
     elseif {$n>1 && [string first $z -file]==0}      {set crashfile $z2}  \
     elseif {$n>1 && [string first $z -tclbody]==0}   {set tclbody $z2}  \
@@ -1289,7 +1291,7 @@ proc crashsql {args} {
   puts $f "sqlite3_crash_enable 1"
   puts $f "sqlite3_crashparams $blocksize $dc $crashdelay $cfile"
   puts $f "sqlite3_test_control_pending_byte $::sqlite_pending_byte"
-  puts $f "sqlite3 db test.db -vfs crash"
+  puts $f $opendb 
 
   # This block sets the cache size of the main database to 10
   # pages. This is done in case the build is configured to omit
@@ -1297,6 +1299,7 @@ proc crashsql {args} {
   puts $f {db eval {SELECT * FROM sqlite_master;}}
   puts $f {set bt [btree_from_db db]}
   puts $f {btree_set_cache_size $bt 10}
+
   if {$prngseed} {
     set seed [expr {$prngseed%10007+1}]
     # puts seed=$seed
diff --git a/test/win32longpath.test b/test/win32longpath.test
index 0a6a8f98e6..9e9ed359c6 100644
--- a/test/win32longpath.test
+++ b/test/win32longpath.test
@@ -19,11 +19,19 @@ set testdir [file dirname $argv0]
 source $testdir/tester.tcl
 set testprefix win32longpath
 
+do_test 1.0 {
+  file_control_vfsname db
+} win32
+
 db close
 set path [file nativename [get_pwd]]
 sqlite3 db [file join $path test.db] -vfs win32-longpath
 
 do_test 1.1 {
+  file_control_vfsname db
+} win32-longpath
+
+do_test 1.2 {
   db eval {
     BEGIN EXCLUSIVE;
     CREATE TABLE t1(x);
@@ -47,13 +55,13 @@ make_win32_dir $longPath(3)
 
 set fileName $longPath(3)\\test.db
 
-do_test 1.2 {
+do_test 1.3 {
   list [catch {sqlite3 db2 [string range $fileName 4 end]} msg] $msg
 } {1 {unable to open database file}}
 
 sqlite3 db3 $fileName -vfs win32-longpath
 
-do_test 1.3 {
+do_test 1.4 {
   db3 eval {
     BEGIN EXCLUSIVE;
     CREATE TABLE t1(x);
@@ -71,13 +79,13 @@ db3 close
 
 sqlite3 db3 $fileName -vfs win32-longpath
 
-do_test 1.4 {
+do_test 1.5 {
   db3 eval {
     PRAGMA journal_mode = WAL;
   }
 } {wal}
 
-do_test 1.5 {
+do_test 1.6 {
   db3 eval {
     BEGIN EXCLUSIVE;
     INSERT INTO t1 VALUES(9);
diff --git a/tool/vdbe-compress.tcl b/tool/vdbe-compress.tcl
index 95cc1ebf5a..a349830bcf 100644
--- a/tool/vdbe-compress.tcl
+++ b/tool/vdbe-compress.tcl
@@ -13,7 +13,7 @@
 # Script usage:
 #
 #          mv vdbe.c vdbe.c.template
-#          tclsh vdbe-compress.tcl <vdbe.c.template >vdbe.c
+#          tclsh vdbe-compress.tcl $CFLAGS <vdbe.c.template >vdbe.c
 #
 # Modifications made:
 #
@@ -42,6 +42,16 @@ set unionDef {}      ;# C code of the union
 set afterUnion {}    ;# C code after the union
 set sCtr 0           ;# Context counter
 
+# If the SQLITE_SMALL_STACK compile-time option is missing, then
+# this transformation becomes a no-op.
+#
+if {![regexp {SQLITE_SMALL_STACK} $argv]} {
+  while {![eof stdin]} {
+    puts [gets stdin]
+  }
+  exit
+}
+
 # Read program text up to the spot where the union should be
 # inserted.
 #