v8 inspector - Runtime.evaluate doesn't work without a contextId

[roblourens]

Writing a client against the new v8 inspector debug protocol, and Node's behavior doesn't match the spec, but this does work in Chrome. Not sure if it should go here or V8.

According to this - https://chromedevtools.github.io/debugger-protocol-viewer/v8/Runtime/#method-evaluate - 'contextID' is optional, and should evaluate in the global context if not present. But if I don't include it, I get the error "Cannot find default execution context".

Request: {"id":4,"method":"Runtime.evaluate","params":{"expression":"123"}}
Response: {"error":{"code":-32000,"message":"Cannot find default execution context"},"id":4}

I'm on OSX, and see this on 6.4.0 and the latest v7 nightly.

[mscdex]

/cc @nodejs/v8-inspector

[eugeneo]

I am planning to investigate it. Looks like it might be working in some cases, I will need to dig deeper.