Add an assert() to the byte-code engine that goes off if the OP_Halt opcode

is invoked with SQLITE_INTERNAL.  This causes the RIGHT JOIN error
"Opcode jumps to ... which is outside the subroutine ..." to fail immediately,
causing it to come more readily to tester's attention.  There is at least
one testcase in test/fuzzdata8.db that asserts due to this change.

FossilOrigin-Name: b8f994414285264f4f7c472dfad646a061fc3580b754eac0f20080c24ecc256d

manifest

@@ -1,5 +1,5 @@
-C Improved\sprogress-handler\sand\sinterrupt\sdetection\sduring\sPRAGMA\sintegrity_check.
-D 2023-01-11T16:17:31.352
+C Add\san\sassert()\sto\sthe\sbyte-code\sengine\sthat\sgoes\soff\sif\sthe\sOP_Halt\sopcode\nis\sinvoked\swith\sSQLITE_INTERNAL.\s\sThis\scauses\sthe\sRIGHT\sJOIN\serror\n"Opcode\sjumps\sto\s...\swhich\sis\soutside\sthe\ssubroutine\s..."\sto\sfail\simmediately,\ncausing\sit\sto\scome\smore\sreadily\sto\stester's\sattention.\s\sThere\sis\sat\sleast\none\stestcase\sin\stest/fuzzdata8.db\sthat\sasserts\sdue\sto\sthis\schange.
+D 2023-01-11T16:44:57.242
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -717,7 +717,7 @@ F src/upsert.c 5303dc6c518fa7d4b280ec65170f465c7a70b7ac2b22491598f6d0b4875b3145
 F src/utf.c ee39565f0843775cc2c81135751ddd93eceb91a673ea2c57f61c76f288b041a0
 F src/util.c 0e5cf9062a796f0f1b6b3228b121b2344932c05425f7c8b5a7cb245812473bbd
 F src/vacuum.c 84ce7f01f8a7a08748e107a441db83bcec13970190ddcb0c9ff522adbc1c23fd
-F src/vdbe.c 6b11efa707f92a1f32d31c749609ab5a6acf31c1d95e277f9199ce1901831b1a
+F src/vdbe.c 813c7895fc5516696b7acd5852df470c9ae7f91f46c4dcd7e0bd4e97f8c145b3
 F src/vdbe.h 73b904a6b3bb27f308c6cc287a5751ebc7f1f89456be0ed068a12b92844c6e8c
 F src/vdbeInt.h fc15815b7bdafbb27e7f027faba2b0112e87d382c0d72241672528806ebc0db5
 F src/vdbeapi.c 4ee67890913c1d2469c68e3ad2e7ddeab57ac5924a64bbfd0906a8ea0d542c7f
@@ -2068,8 +2068,11 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P d030f341369b7f32789cbcf3d0ad9a2ac5cad99a56dac7dfe68b7f06dc339b17
-R 7b76cd997666c81e2de9a02fcc1dc055
+P 6db42780a9e530bcc94490cc6080536309666dc13523272d1799d6661137e908
+R 7452496a34578ebcb2192d17749a2338
+T *branch * code-generator-20220111
+T *sym-code-generator-20220111 *
+T -sym-trunk *
 U drh
-Z 15c60f893bce5ca2030105c4cbb8f7ce
+Z 8538b98284c40a3c08b07910b6f7dc3d
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-6db42780a9e530bcc94490cc6080536309666dc13523272d1799d6661137e908
+b8f994414285264f4f7c472dfad646a061fc3580b754eac0f20080c24ecc256d

src/vdbe.c

@@ -1150,6 +1150,12 @@ case OP_Halt: {
 #ifdef SQLITE_DEBUG
   if( pOp->p2==OE_Abort ){ sqlite3VdbeAssertAbortable(p); }
 #endif
+
+  /* A deliberately coded "OP_Halt SQLITE_INTERNAL * * * *" opcode indicates
+  ** something is wrong with the code generator.  Raise and assertion in order
+  ** to bring this to the attention of fuzzers and other testing tools. */
+  assert( pOp->p1!=SQLITE_INTERNAL );
+
   if( p->pFrame && pOp->p1==SQLITE_OK ){
     /* Halt the sub-program. Return control to the parent frame. */
     pFrame = p->pFrame;