| name | vsintegration-ide-debugging |
| description | Fix F# debugging issues (breakpoints, .pdb, sequence points). Build, run VS integration tests, inspect IL/PDB. |
VS Integration Debugging
Build
.\Build.cmd -c Debug
Run tests
xUnit2 VS Extensibility — not dotnet test.
$runner = (Get-ChildItem "$env:NUGET_PACKAGES\xunit.runner.console" -Recurse -Filter xunit.console.exe | Where-Object { $_.FullName -like '*net472*' } | Select-Object -First 1).FullName
& $runner artifacts\bin\FSharp.Editor.IntegrationTests\Debug\net472\FSharp.Editor.IntegrationTests.exe -parallel none -nologo
Key paths
- Tests + infra:
vsintegration/tests/FSharp.Editor.IntegrationTests/
- Sequence point emit:
src/Compiler/CodeGen/IlxGen.fs → EmitDebugPoint, EnsureNopBetweenDebugPoints
- PDB writer:
src/Compiler/AbstractIL/ilwritepdb.fs
- Collection lowering:
src/Compiler/Optimize/LowerComputedCollections.fs
- Local compiler setup:
UseLocalCompiler.Directory.Build.props
Core rule
VS debugger binds breakpoints only at stack-empty IL offsets. Move the sequence point — never add runtime instructions.
