| Index: src/full-codegen/x64/full-codegen-x64.cc | 
| diff --git a/src/full-codegen/x64/full-codegen-x64.cc b/src/full-codegen/x64/full-codegen-x64.cc | 
| index f50b0d0896e3c66466147d53c1e8ae8f92f98acb..a56c127eb590f5c48a9204834252376e51fcc1c3 100644 | 
| --- a/src/full-codegen/x64/full-codegen-x64.cc | 
| +++ b/src/full-codegen/x64/full-codegen-x64.cc | 
| @@ -504,11 +504,12 @@ | 
| true, | 
| true_label_, | 
| false_label_); | 
| -  DCHECK(lit->IsNull() || lit->IsUndefined(isolate()) || | 
| +  DCHECK(lit->IsNull(isolate()) || lit->IsUndefined(isolate()) || | 
| !lit->IsUndetectable()); | 
| -  if (lit->IsUndefined(isolate()) || lit->IsNull() || lit->IsFalse()) { | 
| +  if (lit->IsUndefined(isolate()) || lit->IsNull(isolate()) || | 
| +      lit->IsFalse(isolate())) { | 
| if (false_label_ != fall_through_) __ jmp(false_label_); | 
| -  } else if (lit->IsTrue() || lit->IsJSObject()) { | 
| +  } else if (lit->IsTrue(isolate()) || lit->IsJSObject()) { | 
| if (true_label_ != fall_through_) __ jmp(true_label_); | 
| } else if (lit->IsString()) { | 
| if (String::cast(*lit)->length() == 0) { | 
|  |