Do not try to eliminate No-ops at the end of VDBE program as this can cause

problems for some DISTINCT handling algorithms, and does not improve
performance.  This also fixes an assertion fault found by libFuzzer.

FossilOrigin-Name: 19d9f9ce691963310fa73ac5ff728ea8dea9d2b2

manifest

@@ -1,5 +1,5 @@
-C Fix\san\sobscure\smemory\sleak\sfound\sby\slibfuzzer\sthat\smay\soccur\sunder\ssome\scircumstances\sif\sexpanding\sa\s"*"\sexpression\scauses\sa\sSELECT\sto\sreturn\smore\sthan\s32767\scolumns.
-D 2015-11-21T19:43:29.760
+C Do\snot\stry\sto\seliminate\sNo-ops\sat\sthe\send\sof\sVDBE\sprogram\sas\sthis\scan\scause\nproblems\sfor\ssome\sDISTINCT\shandling\salgorithms,\sand\sdoes\snot\simprove\nperformance.\s\sThis\salso\sfixes\san\sassertion\sfault\sfound\sby\slibFuzzer.
+D 2015-11-24T00:49:44.712
 F Makefile.in d828db6afa6c1fa060d01e33e4674408df1942a1
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc e928e68168df69b353300ac87c10105206653a03
@@ -406,7 +406,7 @@ F src/vdbe.c b56b2fc9b2f2d0a99d1dbd02d47efaacec253a4c
 F src/vdbe.h efb7a8c1459e31f3ea4377824c6a7e4cb5068637
 F src/vdbeInt.h 75c2e82ee3357e9210c06474f8d9bdf12c81105d
 F src/vdbeapi.c 020681b943e77766b32ae1cddf86d7831b7374ca
-F src/vdbeaux.c b660c995256e3d3e2cb47ccd20b82a1c342fa093
+F src/vdbeaux.c 9a234c9aaab4ad725daf94667cfed441a437c52d
 F src/vdbeblob.c fdc4a81605ae7a35ae94a55bd768b66d6be16f15
 F src/vdbemem.c fdd1578e47bea61390d472de53c565781d81e045
 F src/vdbesort.c a7ec02da4494c59dfd071126dd3726be5a11459d
@@ -1404,7 +1404,7 @@ F tool/vdbe_profile.tcl 246d0da094856d72d2c12efec03250d71639d19f
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh 48bd54594752d5be3337f12c72f28d2080cb630b
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P 198d191b2f5ef7d63ac0093c701955c9052fd734
-R 8ed8d9e954ea81e19ae35a6836359b00
-U dan
-Z f96d100152be981f85597b50bc9a8134
+P 60de5f23424552c98aa760ac89149a3d51f895be
+R 22b08ad19af1727f96b09a8caa1d2b95
+U drh
+Z 5e461470e8ebbd6a466d30753f42166b

manifest.uuid

@@ -1 +1 @@
-60de5f23424552c98aa760ac89149a3d51f895be
+19d9f9ce691963310fa73ac5ff728ea8dea9d2b2

src/vdbeaux.c

@@ -837,7 +837,6 @@ void sqlite3VdbeChangeToNoop(Vdbe *p, int addr){
     freeP4(db, pOp->p4type, pOp->p4.p);
     memset(pOp, 0, sizeof(pOp[0]));
     pOp->opcode = OP_Noop;
-    if( addr==p->nOp-1 ) p->nOp--;
   }
 }