Silently abandon a rollback if the journal has been truncated.

FossilOrigin-Name: 7626f6c9ea04d1a5690dd11bb13e8c3c04e3b0f5

manifest

@@ -1,8 +1,8 @@
 -----BEGIN PGP SIGNED MESSAGE-----
 Hash: SHA1
 
-C Check\sfor\sa\sfailure\sin\sthe\scall\sto\ssqlite3PagerPagecount()\sfrom\swithin\nsqlite3PagerWrite().\s\s(Error\sdiscovered\sby\svalgrind.)
-D 2010-04-02T13:25:22
+C Silently\sabandon\sa\srollback\sif\sthe\sjournal\shas\sbeen\struncated.
+D 2010-04-03T13:08:10
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in 4f2f967b7e58a35bb74fb7ec8ae90e0f4ca7868b
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -155,7 +155,7 @@ F src/os_common.h 240c88b163b02c21a9f21f87d49678a0aa21ff30
 F src/os_os2.c 75a8c7b9a00a2cf1a65f9fa4afbc27d46634bb2f
 F src/os_unix.c 148d2f625db3727250c0b880481ae7630b6d0eb0
 F src/os_win.c 1c7453c2df4dab26d90ff6f91272aea18bcf7053
-F src/pager.c 4f21866040755ce5197b2aeb2be0347b4eb8533f
+F src/pager.c 044c27315eccca1a2304bf81cbc00fa22f2e62bb
 F src/pager.h ef8a2cf10084f60ab45ee2dfded8bf8b0c655ddf
 F src/parse.y ace5c7a125d9f2a410e431ee3209034105045f7e
 F src/pcache.c ace8f6a5ecd4711cc66a1b23053be7109bd437cf
@@ -797,14 +797,14 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
-P 937b931a7cdad6874638158ed6a9ab6356b0bd0c
-R 73d7e6cd9e7a10e0bf151c9030c3b0d7
+P d64d181c79aee3501be6f7eb8c11ab2cc9a8d63c
+R 3bdad3b76e18f681c1678d561acddbce
 U drh
-Z 8d895a1ff28772dc8276f305b1442c69
+Z ebdfae7bcabbf0ea17047bbf6cf050c7
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manifest.uuid

@@ -1 +1 @@
-d64d181c79aee3501be6f7eb8c11ab2cc9a8d63c
+7626f6c9ea04d1a5690dd11bb13e8c3c04e3b0f5

src/pager.c

@@ -1978,6 +1978,14 @@ static int pager_playback(Pager *pPager, int isHot){
           rc = SQLITE_OK;
           pPager->journalOff = szJ;
           break;
+        }else if( rc==SQLITE_IOERR_SHORT_READ ){
+          /* If the journal has been truncated, simply stop reading and
+          ** processing the journal. This might happen if the journal was
+          ** not completely written and synced prior to a crash.  In that
+          ** case, the database should have never been written in the
+          ** first place so it is OK to simply abandon the rollback. */
+          rc = SQLITE_OK;
+          goto end_playback;
         }else{
           /* If we are unable to rollback, quit and return the error
           ** code.  This will cause the pager to enter the error state