| Index: test/cctest/test-strings.cc | 
| diff --git a/test/cctest/test-strings.cc b/test/cctest/test-strings.cc | 
| index b55780182bf7e5af22cd889b23ebed15e7c3dde7..535a6def59bfee6f80f839faab3d3e76bd23d2f8 100644 | 
| --- a/test/cctest/test-strings.cc | 
| +++ b/test/cctest/test-strings.cc | 
| @@ -1398,6 +1398,7 @@ TEST(InvalidExternalString) { | 
| static const int invalid = String::kMaxLength + 1;                         \ | 
| HandleScope scope(isolate);                                                \ | 
| Vector<TYPE> dummy = Vector<TYPE>::New(invalid);                           \ | 
| +    memset(dummy.start(), 0x0, dummy.length() * sizeof(TYPE));                 \ | 
| CHECK(isolate->factory()->FUN(Vector<const TYPE>::cast(dummy)).is_null()); \ | 
| memset(dummy.start(), 0x20, dummy.length() * sizeof(TYPE));                \ | 
| CHECK(isolate->has_pending_exception());                                   \ | 
|  |