| Index: src/hydrogen.cc | 
| diff --git a/src/hydrogen.cc b/src/hydrogen.cc | 
| index 7c5d7df04366d65053a554cbd0f554c4729685d7..9b43a1f6e87dd9d4a9107cefd2b18d5c71e67281 100644 | 
| --- a/src/hydrogen.cc | 
| +++ b/src/hydrogen.cc | 
| @@ -8154,6 +8154,10 @@ bool HOptimizedGraphBuilder::TryInline(Handle<JSFunction> target, | 
|  | 
| CompilationInfo target_info(&parse_info); | 
| Handle<SharedFunctionInfo> target_shared(target->shared()); | 
| +  if (target_shared->HasDebugInfo()) { | 
| +    TraceInline(target, caller, "target is being debugged"); | 
| +    return false; | 
| +  } | 
| if (!Compiler::ParseAndAnalyze(target_info.parse_info())) { | 
| if (target_info.isolate()->has_pending_exception()) { | 
| // Parse or scope error, never optimize this function. | 
|  |