Index: src/whereexpr.c
==================================================================
--- src/whereexpr.c
+++ src/whereexpr.c
@@ -1196,10 +1196,11 @@
       Expr *pNew;
       Expr *pLeft = sqlite3ExprForVectorField(pParse, pExpr->pLeft, i);
       Expr *pRight = sqlite3ExprForVectorField(pParse, pExpr->pRight, i);
 
       pNew = sqlite3PExpr(pParse, pExpr->op, pLeft, pRight, 0);
+      transferJoinMarkings(pNew, pExpr);
       idxNew = whereClauseInsert(pWC, pNew, TERM_DYNAMIC);
       exprAnalyze(pSrc, pWC, idxNew);
     }
     pTerm = &pWC->a[idxTerm];
     pTerm->wtFlags = TERM_CODED|TERM_VIRTUAL;  /* Disable the original */

Index: test/rowvalue.test
==================================================================
--- test/rowvalue.test
+++ test/rowvalue.test
@@ -253,7 +253,17 @@
 } {1 {row value misused}}
 do_catchsql_test 11.8 {
   SELECT * FROM t11 WHERE (a,a) IS NOT 1;
 } {1 {row value misused}}
 
+# 2016-10-27: https://www.sqlite.org/src/tktview/fef4bb4bd9185ec8f
+# Incorrect result from a LEFT JOIN with a row-value constraint
+#
+do_execsql_test 12.1 {
+  DROP TABLE IF EXISTS t1;
+  CREATE TABLE t1(a,b); INSERT INTO t1 VALUES(1,2);
+  DROP TABLE IF EXISTS t2;
+  CREATE TABLE t2(x,y); INSERT INTO t2 VALUES(3,4);
+  SELECT *,'x' FROM t1 LEFT JOIN t2 ON (a,b)=(x,y);
+} {1 2 {} {} x}
 
 finish_test