The process cannot access the file, because it is being used by another process" error during attempt to collect coverage

[tepatelcmc]

I can see previous issue being fixed in an unofficial version - did it ever make it to stable release?

The issue still exist with running test in parallel with vstest code coverage (XPlat code coverage)

[daveMueller]

Are you refering to #1155? The fix for this wasn't released yet, but it will be in the next release. You can try out the fix by consuming our nightly build (https://github.com/coverlet-coverage/coverlet/blob/master/Documentation/ConsumeNightlyBuild.md).

[mathijs-dumon]

Don't think he means that one, but this one:
#857

I'm facing this issue again when using coverlet.console v6.0.0
Since we didn't have the issue before my guess was a nugget, but it seems like it's actually the dotnet global tool (coverlet.console) which is causing the problem.

Just did some more testing with different versions of the tool: I don't have the issue using v3.1.x or v3.2.0, but I do with v6.0

With v6 I get this kind of exception:

---> System.IO.IOException: The process cannot access the file '(real path left out for nda reasons).pdb' because it is being used by another process.
at System.IO.FileSystem.CopyFile(String sourceFullPath, String destFullPath, Boolean overwrite)
at Coverlet.Core.Helpers.InstrumentationHelper.<>c__DisplayClass17_0.b__0() in //src/coverlet.core/Helpers/InstrumentationHelper.cs:line 295
at Coverlet.Core.Helpers.RetryHelper.<>c__DisplayClass0_0.b__0() in //src/coverlet.core/Helpers/RetryHelper.cs:line 29
at Coverlet.Core.Helpers.RetryHelper.Do[T](Func1 action, Func1 backoffStrategy, Int32 maxAttemptCount) in /_/src/coverlet.core/Helpers/RetryHelper.cs:line 55

[mareklinka]

I just started encountering this same after installing the newly-released C# Dev Kit for VSCode. It seems the processes started by VSCode keep a handle open on the assemblies:

TpTrace Warning: 0 : 20944, 1, 2023/06/07, 15:33:20.113, 4930720815067, datacollector.dll, [coverlet]Unable to instrument module: C:\Source\Personal\fourth-pharos\backend\FourthPharos.Domain.Tests\bin\Debug\net7.0\FourthPharos.Domain.dll
System.IO.IOException: The process cannot access the file 'C:\Source\Personal\fourth-pharos\backend\FourthPharos.Domain.Tests\bin\Debug\net7.0\FourthPharos.Domain.dll' because it is being used by another process.
   at Microsoft.Win32.SafeHandles.SafeFileHandle.CreateFile(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options)
   at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
   at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
   at System.IO.Strategies.FileStreamHelpers.ChooseStrategyCore(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access)
   at Coverlet.Core.Helpers.FileSystem.NewFileStream(String path, FileMode mode, FileAccess access) in /_/src/coverlet.core/Helpers/FileSystem.cs:line 52
   at Coverlet.Core.Instrumentation.Instrumenter.InstrumentModule() in /_/src/coverlet.core/Instrumentation/Instrumenter.cs:line 207
   at Coverlet.Core.Instrumentation.Instrumenter.Instrument() in /_/src/coverlet.core/Instrumentation/Instrumenter.cs:line 149
   at Coverlet.Core.Coverage.PrepareModules() in /_/src/coverlet.core/Coverage.cs:line 135

Once I close VSCode and run dotnet test again, instrumentation works as expected. Probably not much Coverlet can do about it, just wanted to mention it. I'll open an issue in the Dev Kit repo, once it goes public.

[github-actions]

This issue is stale because it has been open for 3 months with no activity.

[roryprimrose]

This has been a problem for my team as we have minimum code coverage being applied to changed code as a policy in pull requests. This bug is preventing us from being able to complete pull requests.

I have found that with this bug in 6.0.0, we get this error in the dotnet test build log and 0% coverage reported for that project. I tried downgrading to 3.2.0. That version didn't throw the error but also reported 0% coverage. I have downgraded to 3.1.2 which:

• does not throw the error
• correctly reports coverage percentage
• correctly identifies and excludes coverage for assemblies that are not in the repository

[github-actions]

This issue is stale because it has been open for 3 months with no activity.

[Bertk]

Issue should be closed because the related coverlet nuget package is not mentioned and comments for all packages are available. The new issue template for bugs should improve this.

[github-actions]

This issue is stale because it has been open for 3 months with no activity.