Electron 6: debugging extension quits immediately

[rebornix]

Testing #79731

• Open https://github.com/Microsoft/vscode-pull-request-github in Exploration on Ubuntu
• yarn and yarn run watch
• F5
• Extension debugging instance starts successfully and then quits immediately

No error at all in Debug Console.

[deepak1556]

Renderer log shows

[2019-08-27 12:56:01.181] [renderer1] [error] Cannot connect to runtime process, timeout after 10000 ms - (reason: Cannot connect to the target: connect ECONNREFUSED 127.0.0.1:18925).: Error: Cannot connect to runtime process, timeout after 10000 ms - (reason: Cannot connect to the target: connect ECONNREFUSED 127.0.0.1:18925).
    at handleErrorResponse (file:///Users/demohan/Downloads/Visual Studio Code - Exploration.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:2658:583)
    at file:///Users/demohan/Downloads/Visual Studio Code - Exploration.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:2658:37
    at processTicksAndRejections (internal/process/task_queues.js:89:5)
[2019-08-27 12:56:20.039] [renderer1] [error] Cannot connect to runtime process, timeout after 10000 ms - (reason: Cannot connect to the target: connect ECONNREFUSED 127.0.0.1:45392).: Error: Cannot connect to runtime process, timeout after 10000 ms - (reason: Cannot connect to the target: connect ECONNREFUSED 127.0.0.1:45392).
    at handleErrorResponse (file:///Users/demohan/Downloads/Visual Studio Code - Exploration.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:2658:583)
    at file:///Users/demohan/Downloads/Visual Studio Code - Exploration.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:2658:37
    at processTicksAndRejections (internal/process/task_queues.js:89:5)

[bpasero]

Adding @weinand @isidorn to investigate too.

[deepak1556]

Just to update this happens on all platforms, I tested on windows, macOS and linux.

[weinand]

When Electron is run as node (via the ELECTRON_RUN_AS_NODE flag), it immediately crashes when passing the --inspect-brk flag:

Passing a --inspect flag instead works fine.

Since Electron is crashing deep down in C++ code (instead of showing a message that --inspect-brk is not supported), I consider this a severe Electron 6.0 bug (and I don't plan to work around this issue in VS Code).

I've added the "upstream" label.

[bpasero]

I wonder if this is a regression from electron/electron#19316 or similar.

[deepak1556]

Fix at electron/electron#20098 , should be available with next release.

[weinand]

Extension debugging works fine with Electron 6.