fix(debug): support C# stack trace format in debug console links

[odinGitGmail]

Problem

When clicking on C# stack trace links in the Debug Console (e.g., Program.cs:line 6), VSCode only opens the file at line 1 instead of navigating to the specific line number.

Root Cause

The link detector's regex pattern didn't support the :line 123 format commonly used in C# stack traces.

Solution

1. Updated LINE_COLUMN regex to support both :line 123 and :123:45 formats
2. Modified createPathLink to only set selection when line number > 0
3. Ensured column defaults to 1 when not specified

Testing

• ✅ Code formatting passes (hygiene check)
• ⚠️ Local testing was blocked by build environment issues
• Recommend CI/CD testing by the VSCode team

Related Issue

Fixes navigation in debug console for stack traces across all languages that use the :line N format.

[odinGitGmail]

@microsoft-github-policy-service agree

[Copilot]

Pull request overview

This PR adds support for C# stack trace format (:line 123) in the debug console link detector, enabling proper navigation to specific line numbers when clicking on C# stack traces. The implementation maintains backward compatibility with existing formats (:123, :123:45) while also fixing a pre-existing bug where column numbers would evaluate to NaN when not specified.

Key Changes

• Extended regex patterns to recognize both :line 123 and traditional :123:45 formats
• Fixed column number handling to default to 1 instead of NaN when column is not specified
• Added validation to only set editor selection when line number is greater than 0

[Copilot]

Missing test coverage for the new :line 123 format. The existing tests only cover the :123:45 format. Consider adding tests for:

1. file.cs:line 6 (C# stack trace format)
2. file.cs:line 6:10 (C# format with column)
3. Mixed scenarios to ensure backward compatibility

[connor4312]

Hm, looks like these tests fail on Windows:

  1) Debug - Link Detector
       mixedStackTraceFormats:

      
      + expected - actual

      -false
      +true
      
  AssertionError: false == true
  	at Context.<anonymous> (http://localhost:58316/c1bccc748c2f775b6f519880fdd91232/out/vs/workbench/contrib/debug/test/browser/linkDetector.test.js:222:5)



2025-12-13T00:07:57.284Z pw:browser [pid=6476] <gracefully close start>
2025-12-13T00:07:57.314Z pw:browser [pid=6476] <process did exit: exitCode=0, signal=null>
2025-12-13T00:07:57.314Z pw:browser [pid=6476] starting temporary directories cleanup
2025-12-13T00:07:57.321Z pw:browser [pid=6476] finished temporary directories cleanup
2025-12-13T00:07:57.321Z pw:browser [pid=6476] <gracefully close end>
The followings tests are failing:
 - Debug - Link Detector mixedStackTraceFormats (reason: false == true)

[connor4312]

thanks!