1 files changed, 1 insertions, 0 deletions
diff --git a/src/insert.c b/src/insert.c
index 1f6cdffcc..65d11bee5 100644
--- a/src/insert.c
+++ b/src/insert.c
@@ -1793,6 +1793,7 @@ void sqlite3GenerateConstraintChecks(
           case OE_Fail: {
             char *zMsg = sqlite3MPrintf(db, "%s.%s", pTab->zName,
                                         pCol->zCnName);
+            testcase( zMsg==0 && db->mallocFailed==0 );
             sqlite3VdbeAddOp3(v, OP_HaltIfNull, SQLITE_CONSTRAINT_NOTNULL,
                               onError, iReg);
             sqlite3VdbeAppendP4(v, zMsg, P4_DYNAMIC);