Update the fuzzinvariant logic in fuzzcheck to the latest code from

dbsqlfuzz.

FossilOrigin-Name: 739ad584765f1fc0eb196db870785da1726805cc2d9dd0a831a37a9e55a4afe9

manifest

@@ -1,5 +1,5 @@
-C Fix\sbuilt-in\sdocumentation\sfor\sthe\s".mode\sqbox"\scommand\sin\sthe\sCLI.
-D 2022-10-24T11:10:40.311
+C Update\sthe\sfuzzinvariant\slogic\sin\sfuzzcheck\sto\sthe\slatest\scode\sfrom\ndbsqlfuzz.
+D 2022-10-24T12:38:32.096
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -1149,7 +1149,7 @@ F test/fuzzdata8.db 653423800b7671e67caa740e977d80e1360f0d69e9992851f3ea5c4a69a2
 F test/fuzzer1.test 3d4c4b7e547aba5e5511a2991e3e3d07166cfbb8
 F test/fuzzer2.test a85ef814ce071293bce1ad8dffa217cbbaad4c14
 F test/fuzzerfault.test f64c4aef4c9e9edf1d6dc0d3f1e65dcc81e67c996403c88d14f09b74807a42bc
-F test/fuzzinvariants.c a91f439e512c72045bddaf0f0ee3b876b2fe645e076aefb085658f1337066f7e
+F test/fuzzinvariants.c 760a1004ae4c4cef398310631ea6d441c5e8297af0f688a2dc7a467afd22df33
 F test/gcfault.test dd28c228a38976d6336a3fc42d7e5f1ad060cb8c
 F test/gencol1.test cc0dbb0ee116e5602e18ea7d47f2a0f76b26e09a823b7c36ef254370c2b0f3c1
 F test/genesis.tcl 1e2e2e8e5cc4058549a154ff1892fe5c9de19f98
@@ -2036,8 +2036,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P d96f6cc8475ae5509b8bff2db75e3c6f69a214d58d8979fbc0162ae488a040dc
-R d80b6eff956f308472eb5e33e1c2da52
+P 3d7ea33be1076fd21681bdcff0c489646c017594b42b4a21a74e9e2d3947890b
+R 8f78a5fa1e8c20b5a3592cf3de894b6c
 U drh
-Z f106cab0f2ec627c6908493949c58d50
+Z c3f47754444910e4af4759510c20d50b
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-3d7ea33be1076fd21681bdcff0c489646c017594b42b4a21a74e9e2d3947890b
+739ad584765f1fc0eb196db870785da1726805cc2d9dd0a831a37a9e55a4afe9

test/fuzzinvariants.c

@@ -29,7 +29,7 @@
 
 /* Forward references */
 static char *fuzz_invariant_sql(sqlite3_stmt*, int);
-static int sameValue(sqlite3_stmt*,int,sqlite3_stmt*,int);
+static int sameValue(sqlite3_stmt*,int,sqlite3_stmt*,int,sqlite3_stmt*);
 static void reportInvariantFailed(sqlite3_stmt*,sqlite3_stmt*,int);
 
 /*
@@ -108,13 +108,16 @@ int fuzz_invariant(
   }
   while( (rc = sqlite3_step(pTestStmt))==SQLITE_ROW ){
     for(i=0; i<nCol; i++){
-      if( !sameValue(pStmt, i, pTestStmt, i) ) break;
+      if( !sameValue(pStmt, i, pTestStmt, i, 0) ) break;
     }
     if( i>=nCol ) break;
   }
   if( rc==SQLITE_DONE ){
     /* No matching output row found */
     sqlite3_stmt *pCk = 0;
+
+    /* This is not a fault if the database file is corrupt, because anything
+    ** can happen with a corrupt database file */
     rc = sqlite3_prepare_v2(db, "PRAGMA integrity_check", -1, &pCk, 0);
     if( rc ){
       sqlite3_finalize(pCk);
@@ -132,6 +135,7 @@ int fuzz_invariant(
       return SQLITE_CORRUPT;
     }
     sqlite3_finalize(pCk);
+
     if( sqlite3_strlike("%group%by%order%by%desc%",sqlite3_sql(pStmt),0)==0 ){
       /* dbsqlfuzz crash-647c162051c9b23ce091b7bbbe5125ce5f00e922
       ** Original statement is:
@@ -145,6 +149,7 @@ int fuzz_invariant(
       */
       goto not_a_fault;
     }
+
     if( sqlite3_strlike("%limit%)%order%by%", sqlite3_sql(pTestStmt),0)==0 ){
       /* crash-89bd6a6f8c6166e9a4c5f47b3e70b225f69b76c6
       ** Original statement is:
@@ -159,6 +164,31 @@ int fuzz_invariant(
       */
       goto not_a_fault;
     }
+
+    /* The original sameValue() comparison assumed a collating sequence
+    ** of "binary".  It can sometimes get an incorrect result for different
+    ** collating sequences.  So rerun the test with no assumptions about
+    ** collations.
+    */
+    rc = sqlite3_prepare_v2(db,
+       "SELECT ?1=?2 OR ?1=?2 COLLATE nocase OR ?1=?2 COLLATE rtrim",
+       -1, &pCk, 0);
+    if( rc==SQLITE_OK ){
+      sqlite3_reset(pTestStmt);
+      while( (rc = sqlite3_step(pTestStmt))==SQLITE_ROW ){
+        for(i=0; i<nCol; i++){
+          if( !sameValue(pStmt, i, pTestStmt, i, pCk) ) break;
+        }
+        if( i>=nCol ){
+          sqlite3_finalize(pCk);
+          goto not_a_fault;
+        }
+      }
+    }
+    sqlite3_finalize(pCk);
+
+    /* Invariants do not necessarily work if there are virtual tables
+    ** involved in the query */
     rc = sqlite3_prepare_v2(db, 
             "SELECT 1 FROM bytecode(?1) WHERE opcode='VOpen'", -1, &pCk, 0);
     if( rc==SQLITE_OK ){
@@ -272,7 +302,11 @@ static char *fuzz_invariant_sql(sqlite3_stmt *pStmt, int iCnt){
 /*
 ** Return true if and only if v1 and is the same as v2.
 */
-static int sameValue(sqlite3_stmt *pS1, int i1, sqlite3_stmt *pS2, int i2){
+static int sameValue(
+  sqlite3_stmt *pS1, int i1,       /* Value to text on the left */
+  sqlite3_stmt *pS2, int i2,       /* Value to test on the right */
+  sqlite3_stmt *pTestCompare       /* COLLATE comparison statement or NULL */
+){
   int x = 1;
   int t1 = sqlite3_column_type(pS1,i1);
   int t2 = sqlite3_column_type(pS2,i2);
@@ -302,6 +336,14 @@ static int sameValue(sqlite3_stmt *pS1, int i1, sqlite3_stmt *pS2, int i2){
         const char *z2 = (const char*)sqlite3_column_text(pS2,i2);
         x = ((z1==0 && z2==0) || (z1!=0 && z2!=0 && strcmp(z1,z1)==0));
         printf("Encodings differ.  %d on left and %d on right\n", e1, e2);
+        abort();
+      }
+      if( pTestCompare ){
+        sqlite3_bind_value(pTestCompare, 1, sqlite3_column_value(pS1,i1));
+        sqlite3_bind_value(pTestCompare, 2, sqlite3_column_value(pS2,i2));
+        x = sqlite3_step(pTestCompare)==SQLITE_ROW
+                      && sqlite3_column_int(pTestCompare,0)!=0;
+        sqlite3_reset(pTestCompare);
         break;
       }
       if( e1!=SQLITE_UTF8 ){