Bug 27793 – Inspector: Cannot access properties of a wrapped callback function return value

• Component: Web Inspector (Deprecated)
• Status: RESOLVED FIXED

[Keishi Hattori]

I think this is because JSInspectorCallbackWrapper wraps the return value (except for primitive values) with JSInspectorCallbackWrapper and the attributes like allowsGetPropertyNames and allowsGetProperty are set to false.

JSInspectorCallbackWrapper wraps a function in the "inspector" that gets called from the "inspected window".

I think the expected behavior for the wrapping of each type of return value is
1. Primitive value  ->  return unwrapped
2. Object from "inspected window"  ->  return unwrapped
3. Function from "inspector"  ->  wrap with JSInspectorCallbackWrapper
4. Object(not function) from "inspector"  -> wrap with JSInspectorCallbackWrapper? I don't think this case should happen at all.

Current behavior seems to be
1. Primitive value  ->  return unwrapped
2. Object from "inspected window"  ->  wrap with JSInspectorCallbackWrapper
3. Function from "inspector"  ->  wrap with JSInspectorCallbackWrapper
4. Object(not function) from "inspector"  -> wrap with JSInspectorCallbackWrapper

Conclusion:
We should modify JSInspectorCallbackWrapper so that it the return value is unwrapped if it is an object from the "inspected window".

[Timothy Hatcher]

The plan is to kill JSInspectorCallbackWrapper soon…