Fix a problem with queries that use "IN(...) ORDER BY ... NULLS LAST" or similar introduced by [d7648e21605a0b38].

Author: danielk-1977

src/wherecode.c

@@ -2106,7 +2106,7 @@ Bitmask sqlite3WhereCodeOneLoopStart(
 
     /* Record the instruction used to terminate the loop. */
     if( (pLoop->wsFlags & WHERE_ONEROW)
-     || (pLevel->u.in.nIn && whereLoopIsOneRow(pLoop))
+     || (pLevel->u.in.nIn && regBignull==0 && whereLoopIsOneRow(pLoop))
     ){
       pLevel->op = OP_Noop;
     }else if( bRev ){

test/in7.test

@@ -103,5 +103,18 @@ foreach {tn nNext idx sql} {
   } $nNext
 }
 
+#-------------------------------------------------------------------------
+reset_db
+do_execsql_test 2.0 {
+  CREATE TABLE t1(a TEXT PRIMARY KEY, b TEXT) WITHOUT ROWID;
+  INSERT INTO t1 VALUES('1', 'one');
+  INSERT INTO t1 VALUES('2', NULL);
+  INSERT INTO t1 VALUES('3', 'three');
+}
+
+do_execsql_test 2.1 {
+  SELECT b FROM t1 WHERE a IN (1,2,3) ORDER BY b ASC NULLS LAST;
+} {one three {}}
+
 
 finish_test