[debug] Error: Illegal value for lineNumber when "stopOnEntry": true in the launch.json

[kittaakos]

Bug Description:

When stopOnEntry is set to true in the launch.json config, Theia throws an error when starting the debugger, as it cannot correctly map the column number extracted from the rawDebugProtol.StackFrame. Debug stack frame tries to open the following location:

{
    "start": {
        "line": 0,
        "character": -1
    }
}

textModel.ts:832 Uncaught (in promise) Error: Illegal value for lineNumber
    at TextModel.getLineMaxColumn (textModel.ts:832)
    at MonacoEditorModel.getLineMaxColumn (monaco-editor-model.ts:293)
    at EditorPreviewManager.getSelection (editor-manager.ts:260)
    at EditorPreviewManager.revealSelection (editor-manager.ts:242)
    at EditorPreviewManager.tryGetPendingWidget (editor-manager.ts:99)
    at EditorPreviewManager.tryGetPendingWidget (editor-preview-manager.ts:102)
    at EditorPreviewManager.getOrCreateWidget (editor-preview-manager.ts:110)
    at EditorPreviewManager.open (widget-open-handler.ts:89)
    at EditorPreviewManager.open (editor-manager.ts:203)
    at DebugSource.open (debug-source.ts:48)

Steps to Reproduce:

1. Start the Microsoft/vscode-mock-debug debugger in Theia.
2. It throws an error.

If you do not want to build the vscode-mock-debug extension on your own, you can use the VS Code extension mock debugger from #11871. Please make sure to open the sampleWorkspace from the https://github.com/Microsoft/vscode-mock-debug repo.

Additional Information

• Operating System: macOS, 12.5.1
• Theia Version: fe8e4c1

[kittaakos]

I will look into this.