Stregthen an assert() in the WHERE clause code generator for the min/max

optimization.

FossilOrigin-Name: 1bd4b97d6405c9b093f3bfed914c56088ee13e4a2242be62b74a86660f74f533

manifest

@@ -1,5 +1,5 @@
-C Fix\sa\sproblem\swith\squeries\sof\sthe\sform\s"SELECT\smin(<expr>)\s...\sWHERE\s<expr>=?"\swhere\sthere\sis\san\sindex\son\s<expr>.\sFix\sfor\s[71e183ca].
-D 2019-08-03T16:37:40.150
+C Stregthen\san\sassert()\sin\sthe\sWHERE\sclause\scode\sgenerator\sfor\sthe\smin/max\noptimization.
+D 2019-08-03T19:06:18.863
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -611,7 +611,7 @@ F src/wal.h 606292549f5a7be50b6227bd685fa76e3a4affad71bb8ac5ce4cb5c79f6a176a
 F src/walker.c d5a94907dcac990e31976be9dc769d17f6a806782593d6aec9d760ee01ec22cd
 F src/where.c dee31d6842a8f6acd54bc7a7c2505050cd0fa52228634187195bc0b64eb9c240
 F src/whereInt.h 2bb9632f90a1a32952d43a52587209cdd536c3548715d7859bf0c1f9a65a2efd
-F src/wherecode.c b45c98f260a9fa84787b0673d7053d55d60cb55900236376cac935f2ab6ce3ec
+F src/wherecode.c 5dd20651afc1f67bad35523514e87f017295f1cddfdf5d1ea31a8e299d7054a8
 F src/whereexpr.c 5e559bdd24b06e3bc2e68f258bf751302954dc1e432daf71fdd8098a71462326
 F src/window.c 7728ba7a3d44084a44eefb60464a88fb2ff035eb20cdeb1160ae65ac3c0be6b9
 F test/8_3_names.test ebbb5cd36741350040fd28b432ceadf495be25b2
@@ -1838,7 +1838,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
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 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
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-R cc89bfbc259b9b7136163b32cac7f905
-U dan
-Z 99d6ce70f917d34037e260832ba76b7f
+P d465c3eef458c851d97eea6e4117247d9c69386b276168080dbff7bb64070c93
+R 8f097cfa3ce30475d286df29d894ccc6
+U drh
+Z 75bab5a01b9371fe4c3ad256ed32bece

manifest.uuid

@@ -1 +1 @@
-d465c3eef458c851d97eea6e4117247d9c69386b276168080dbff7bb64070c93
+1bd4b97d6405c9b093f3bfed914c56088ee13e4a2242be62b74a86660f74f533

src/wherecode.c

@@ -1706,7 +1706,7 @@ Bitmask sqlite3WhereCodeOneLoopStart(
         sqlite3VdbeAddOp2(v, OP_Goto, 0, sqlite3VdbeCurrentAddr(v)+2);
 
         op = aStartOp[(start_constraints<<2) + (1<<1) + bRev];
-        assert( op!=0 );
+        assert( op==OP_SeekGE || op==OP_SeekLE );
         sqlite3VdbeAddOp4Int(v, op, iIdxCur, addrNxt, regBase, nConstraint);
         VdbeCoverage(v);
         VdbeCoverageIf(v, op==OP_SeekGE);  testcase( op==OP_SeekGE );