Mircotaskscope in the renderer interferes with debugging async/await

[deepak1556]

Electron Version: 6-1-x, 7-1-x, 8-xy

Expected Behavior

Devtools should perform normally without crash

Actual Behavior

Renderer crashes with following,

https://gist.github.com/deepak1556/29458392e72d01c097b822cbb36848f9 -> interesting frame starts from 33

To Reproduce

https://gist.github.com/deepak1556/f9ce7fd4d695361f1568c787affa3795

This originally surfaced in microsoft/vscode#83994 as a different issue, this is just one example based on the task event loop was processing when we originally saw the crash but we have explicit Microtaskscope spread out in a couple of places in the renderer and depending on the task queue at the time of debugger pause, they will cause a similar issue.

/cc @zcbenz

[zcbenz]

The blink::PromiseRejectHandlerInMainThread is called when promise is rejected, and crash happened inside it because blink could not could a valid DOM window at current scope.

From the crash report, it seems that we need to make electron::EmitIPCEvent call JS via blink.

[electron-triage]

The Electron version reported on this issue is no longer supported. See our supported versions documentation.

If this is still reproducible on a supported version, please open a new issue with any other new information that a maintainer should know.

Thank you for taking the time to report this issue and helping to make Electron better! Your help is appreciated.

[deepak1556]

Can confirm the issue doesn't repro with Electron >=11