| Index: src/ia32/code-stubs-ia32.cc | 
| diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc | 
| index b30d5192f0a8550d0952d421f5d9a9d6bdbcf77c..70d507ad71f5e1b297eff05af7af3e57cc72a8f7 100644 | 
| --- a/src/ia32/code-stubs-ia32.cc | 
| +++ b/src/ia32/code-stubs-ia32.cc | 
| @@ -632,6 +632,14 @@ void ToBooleanStub::Generate(MacroAssembler* masm) { | 
| __ bind(¬_string); | 
| } | 
|  | 
| +  if (types_.Contains(SYMBOL)) { | 
| +    // Symbol value -> true. | 
| +    Label not_symbol; | 
| +    __ CmpInstanceType(map, SYMBOL_TYPE); | 
| +    __ j(not_equal, ¬_symbol, Label::kNear); | 
| +    __ bind(¬_symbol); | 
| +  } | 
| + | 
| if (types_.Contains(HEAP_NUMBER)) { | 
| // heap number -> false iff +0, -0, or NaN. | 
| Label not_heap_number, false_result; | 
|  |