Breakpoints in plugin-host not hit

[tsmaeder]

Bug Description:

Steps to Reproduce:

1. Put a breakpoint in a file that is used in the plugin host, for example workspace.ts
2. Start theia via "Launch Electron Back End" launch config
3. Cause the code where you put the breakpoint to be executed
4. Observe: the debugger does not pause i.e. the breakpoint is not hit.

Note that the breakpoint shows up as "unbound" (empty circle in the margin), meaning the debugger does not think the code corresponding to the breakpoint location is loaded.

Additional Information

• Operating System: Windows 11
• Theia Version: Blueprint 1.39.0

[msujew]

Does this work with vscode as expected? Or is it an issue in how we generate backend source maps after #12412?

[tsmaeder]

Nope, this works with the exact same workspace in VS Code.

[tsmaeder]

I noticed that the breakpoints do seem to be hit, but the UI does not update accordingly: I need to select the plugin-host process in the "threads" view in order to get the proper source and stack shown.

[JonasHelming]

@vladarama @vince-fugnitto This ight be something for @vladarama ?