Fix a crash that could occur in SQLITE_MAX_EXPR_DEPTH=0 builds when processing SQL containing syntax errors.

FossilOrigin-Name: 5f58dd3a19605b6f49b4364fa29892502eff35f12a7693a8694100e1844711ea

manifest

@@ -1,5 +1,5 @@
-C Avoid\sa\sbuffer\soverrun\sin\stest\scode\sthat\scould\soccur\sif\scertain\stest\sfunctions\swere\spassed\sa\shex-string\scontaining\san\sodd\snumber\sof\sdigits.
+C Fix\sa\scrash\sthat\scould\soccur\sin\sSQLITE_MAX_EXPR_DEPTH=0\sbuilds\swhen\sprocessing\sSQL\scontaining\ssyntax\serrors.
-D 2020-08-20T11:03:33.797
+D 2020-08-20T16:25:26.970
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -487,7 +487,7 @@ F src/date.c dace306a10d9b02ee553d454c8e1cf8d3c9b932e137738a6b15b90253a9bfc10
 F src/dbpage.c 8a01e865bf8bc6d7b1844b4314443a6436c07c3efe1d488ed89e81719047833a
 F src/dbstat.c 3aa79fc3aed7ce906e4ea6c10e85d657299e304f6049861fe300053ac57de36c
 F src/delete.c a2a603ab07cced8560065b0e2c4c9c842f2c5a2fd43d87355f95eb53bae7fe21
-F src/expr.c 616244b0f99ca50320b44c547972ed8de7e92c2088b300810b9ac804c40fbc9c
+F src/expr.c 4c8b9c2942adb896b9d1613794bd00cbf98c94e38c41cd5720b78bcdc21a965d
 F src/fault.c 460f3e55994363812d9d60844b2a6de88826e007
 F src/fkey.c 83372403298e6a7dd989a47aaacdbaa5b4307b5199dbd56e07d4896066b3de72
 F src/func.c 2333eb4277f55a5efdc12ef754e7d7ec9105d257b2fd00301d23ce1e8fa67dc0
@@ -541,7 +541,7 @@ F src/sqlite.h.in d2c03414a8ee5d4a6855c04dd7cd5998e45139b0fe66b65bae86d4223edd09
 F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
 F src/sqlite3ext.h 2d1af80082edffd71c6f96f70ad1ce6a4fb46615ad10291fc77fe0dea9ff0197
 F src/sqliteInt.h 7dd1f3a93e801c90cf108149d041c6cc32d3e9503d66aa415455dae1614b6b53
-F src/sqliteLimit.h 95cb8479ca459496d9c1c6a9f76b38aee12203a56ce1092fe13e50ae2454c032
+F src/sqliteLimit.h d7323ffea5208c6af2734574bae933ca8ed2ab728083caa117c9738581a31657
 F src/status.c 4b8bc2a6905163a38b739854a35b826c737333fab5b1f8e03fa7eb9a4799c4c1
 F src/table.c 0f141b58a16de7e2fbe81c308379e7279f4c6b50eb08efeec5892794a0ba30d1
 F src/tclsqlite.c 986b6391f02cd9b53c1d688be55899f6ffddeb8e8014cd83c1b73ff912579a71
@@ -1272,7 +1272,7 @@ F test/regexp1.test 497ea812f264d12b6198d6e50a76be4a1973a9d8
 F test/regexp2.test 40e894223b3d6672655481493f1be12012f2b33c
 F test/reindex.test cd9d6021729910ece82267b4f5e1b5ac2911a7566c43b43c176a6a4732e2118d
 F test/releasetest.tcl fb76d8fcc95ac29d6356cd9e52b726ab9e43a24082897618dfbcb7c2b0049153 x
-F test/releasetest_data.tcl 4d251c430b67fa0d9422fa8214df54546d3aff55dfcc9124503f9e26a576c8fe
+F test/releasetest_data.tcl b9cb30360759b80d92d4ea86b84ebfd8035b97f9078a482deb3cf9d0b2442655
 F test/resetdb.test 8062cf10a09d8c048f8de7711e94571c38b38168db0e5877ba7561789e5eeb2b
 F test/resolver01.test f4022acafda7f4d40eca94dbf16bc5fc4ac30ceb
 F test/rollback.test 06680159bc6746d0f26276e339e3ae2f951c64812468308838e0a3362d911eaa
@@ -1879,7 +1879,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P e1595a20d71e61957944cc2b634578968cda8fba08a1f1e75edba20dc9c6080b
+P 3c5e63c22ffbfeb66eb6ee38912d29fad6f2bd4d74b6a25e89bd36bf40eaa661
-R 6913aaf82b6ea309e44c16e0d51aa7e8
+R 080728499b9753952934be39a06d4044
 U dan
-Z ea10fc98bd455a7905a78ecc0625e60d
+Z 6d7beb1b999c7f45f1a0f735822f9196

manifest.uuid

@@ -1 +1 @@
-3c5e63c22ffbfeb66eb6ee38912d29fad6f2bd4d74b6a25e89bd36bf40eaa661
+5f58dd3a19605b6f49b4364fa29892502eff35f12a7693a8694100e1844711ea

src/expr.c

@@ -768,6 +768,7 @@ int sqlite3SelectExprHeight(Select *p){
 ** Expr.flags. 
 */
 void sqlite3ExprSetHeightAndFlags(Parse *pParse, Expr *p){
+  if( pParse->nErr ) return;
   if( p && p->x.pList && !ExprHasProperty(p, EP_xIsSelect) ){
     p->flags |= EP_Propagate & sqlite3ExprListFlags(p->x.pList);
   }

src/sqliteLimit.h

@@ -60,11 +60,7 @@
 ** The maximum depth of an expression tree. This is limited to 
 ** some extent by SQLITE_MAX_SQL_LENGTH. But sometime you might 
 ** want to place more severe limits on the complexity of an 
-** expression.
+** expression. A value of 0 means that there is no limit.
-**
-** A value of 0 used to mean that the limit was not enforced.
-** But that is no longer true.  The limit is now strictly enforced
-** at all times.
 */
 #ifndef SQLITE_MAX_EXPR_DEPTH
 # define SQLITE_MAX_EXPR_DEPTH 1000

test/releasetest_data.tcl

@@ -136,6 +136,11 @@ array set ::Configs [strip_comments {
     -DSQLITE_MUTATION_TEST
     --enable-fts5 --enable-json1
   }
+  "Debug-Two" {
+    -DSQLITE_DEFAULT_MEMSTATUS=0
+    -DSQLITE_MAX_EXPR_DEPTH=0
+    --enable-debug
+  }
   "Fast-One" {
     -O6
     -DSQLITE_ENABLE_FTS4=1
@@ -286,6 +291,7 @@ array set ::Platforms [strip_comments {
     "Check-Symbols*"          checksymbols
     "Fast-One"                "fuzztest test"
     "Debug-One"               "mptest test"
+    "Debug-Two"               "test"
     "Have-Not"                test
     "Secure-Delete"           test
     "Unlock-Notify"           "QUICKTEST_INCLUDE=notify2.test test"