[BUG] Collector fails when one of the project's libraries is called collector

[alex-ntk]

Tested on two machines, reproducible 100%.

mkdir MySolution
cd MySolution
dotnet new classlib -n MyLibrary
dotnet new console -n Collector
cd Collector
dotnet add reference ../MyLibrary/MyLibrary.csproj
cd ..
dotnet new nunit -n MyTests
cd MyTests
dotnet add reference ../Collector/Collector.csproj
cd ..
dotnet.exe test MyTests\MyTests.csproj --collect:"XPlat Code Coverage"

fails with

Data collector 'XPlat code coverage' message: [coverlet]Coverlet.Collector.Utilities.CoverletDataCollectorExceptio
      n: CoverletCoverageDataCollector: Failed to instrument modules
       ---> System.AggregateException: One or more errors occurred. (The process cannot access the file 'C:\Projects\Cor
      al.TradeCollector.1\MySolution\MyTests\bin\Debug\net9.0\Collector.dll' because it is being used by another process
      .) (The process cannot access the file 'C:\Projects\Coral.TradeCollector.1\MySolution\MyTests\bin\Debug\net9.0\Col
      lector.dll' because it is being used by another process.) (The process cannot access the file 'C:\Projects\Coral.T
      radeCollector.1\MySolution\MyTests\bin\Debug\net9.0\Collector.dll' because it is being used by another process.) (
      The process cannot access the file 'C:\Projects\Coral.TradeCollector.1\MySolution\MyTests\bin\Debug\net9.0\Collect
      or.dll' because it is being used by another process.) (The process cannot access the file 'C:\Projects\Coral.Trade
      Collector.1\MySolution\MyTests\bin\Debug\net9.0\Collector.dll' because it is being used by another process.) (The
      process cannot access the file 'C:\Projects\Coral.TradeCollector.1\MySolution\MyTests\bin\Debug\net9.0\Collector.d
      ll' because it is being used by another process.) (The process cannot access the file 'C:\Projects\Coral.TradeColl
      ector.1\MySolution\MyTests\bin\Debug\net9.0\Collector.dll' because it is being used by another process.) (The proc
      ess cannot access the file 'C:\Projects\Coral.TradeCollector.1\MySolution\MyTests\bin\Debug\net9.0\Collector.dll'
      because it is being used by another process.) (The process cannot access the file 'C:\Projects\Coral.TradeCollecto
      r.1\MySolution\MyTests\bin\Debug\net9.0\Collector.dll' because it is being used by another process.) (The process
      cannot access the file 'C:\Projects\Coral.TradeCollector.1\MySolution\MyTests\bin\Debug\net9.0\Collector.dll' beca
      use it is being used by another process.) (The process cannot access the file 'C:\Projects\Coral.TradeCollector.1\
      MySolution\MyTests\bin\Debug\net9.0\Collector.dll' because it is being used by another process.) (The process cann
      ot access the file 'C:\Projects\Coral.TradeCollector.1\MySolution\MyTests\bin\Debug\net9.0\Collector.dll' because
      it is being used by another process.)
       ---> System.IO.IOException: The process cannot access the file 'C:\Projects\Coral.TradeCollector.1\MySolution\MyT
      ests\bin\Debug\net9.0\Collector.dll' because it is being used by another process.
         at System.IO.FileSystem.CopyFile(String sourceFullPath, String destFullPath, Boolean overwrite)
         at Coverlet.Core.Helpers.FileSystem.Copy(String sourceFileName, String destFileName, Boolean overwrite) in /_/s
      rc/coverlet.core/Helpers/FileSystem.cs:line 35
         at Coverlet.Core.Helpers.InstrumentationHelper.<>c__DisplayClass17_0.<RestoreOriginalModule>b__0() in /_/src/co
      verlet.core/Helpers/InstrumentationHelper.cs:line 269
         at Coverlet.Core.Helpers.RetryHelper.<>c__DisplayClass0_0.<Retry>b__0() in /_/src/coverlet.core/Helpers/RetryHe
      lper.cs:line 28
         at Coverlet.Core.Helpers.RetryHelper.Do[T](Func`1 action, Func`1 backoffStrategy, Int32 maxAttemptCount) in /_/
      src/coverlet.core/Helpers/RetryHelper.cs:line 55
         --- End of inner exception stack trace ---
         at Coverlet.Core.Helpers.RetryHelper.Do[T](Func`1 action, Func`1 backoffStrategy, Int32 maxAttemptCount) in /_/
      src/coverlet.core/Helpers/RetryHelper.cs:line 62
         at Coverlet.Core.Helpers.RetryHelper.Retry(Action action, Func`1 backoffStrategy, Int32 maxAttemptCount) in /_/
      src/coverlet.core/Helpers/RetryHelper.cs:line 26
         at Coverlet.Core.Helpers.InstrumentationHelper.RestoreOriginalModule(String module, String identifier) in /_/sr
      c/coverlet.core/Helpers/InstrumentationHelper.cs:line 267
         at Coverlet.Core.Coverage.PrepareModules() in /_/src/coverlet.core/Coverage.cs:line 145
         at Coverlet.Collector.DataCollection.CoverageWrapper.PrepareModules(Coverage coverage) in /_/src/coverlet.colle
      ctor/DataCollection/CoverageWrapper.cs:line 71
         at Coverlet.Collector.DataCollection.CoverageManager.InstrumentModules() in /_/src/coverlet.collector/DataColle
      ction/CoverageManager.cs:line 66
       ---> (Inner Exception #1) System.IO.IOException: The process cannot access the file 'C:\Projects\Coral.TradeColle
      ctor.1\MySolution\MyTests\bin\Debug\net9.0\Collector.dll' because it is being used by another process.
         at System.IO.FileSystem.CopyFile(String sourceFullPath, String destFullPath, Boolean overwrite)
         at Coverlet.Core.Helpers.FileSystem.Copy(String sourceFileName, String destFileName, Boolean overwrite) in /_/s
      rc/coverlet.core/Helpers/FileSystem.cs:line 35
         at Coverlet.Core.Helpers.InstrumentationHelper.<>c__DisplayClass17_0.<RestoreOriginalModule>b__0() in /_/src/co
      verlet.core/Helpers/InstrumentationHelper.cs:line 269
         at Coverlet.Core.Helpers.RetryHelper.<>c__DisplayClass0_0.<Retry>b__0() in /_/src/coverlet.core/Helpers/RetryHe
      lper.cs:line 28
         at Coverlet.Core.Helpers.RetryHelper.Do[T](Func`1 action, Func`1 backoffStrategy, Int32 maxAttemptCount) in /_/
      src/coverlet.core/Helpers/RetryHelper.cs:line 55<---

... another 10 of these

[Bertk]

Please provide more information e.g. diag log files. This looks like a known issue CoverletCoverageDataCollector: Failed to instrument modules

Please build test project, publish test project and try dotnet vstest … (see Coverlet integration with VSTest )

[alex-ntk]

I think it would be better if try to produce diag log files as it seems that you know how to do it and I, unfortunately, do not... If you have any troubles reproducing the issue on your end, please let me know.

[Bertk]

You can use optional parameters to create diag log files (see below). I used your instructions and created a repo but could not reproduce your errors.

We need still more information e.g.

• dotnet SDK version and details for created csproj files etc.
• details runtime enviroment

Please use latest released coverlet nuget package

dotnet build -c debug
dotnet.exe test MyTests\MyTests.csproj -c debug --collect:"XPlat Code Coverage" --no-build -bl:test.binlog --diag:"artifacts\log\debug\test.diag.log;tracelevel=verbose"

or use vstest

dotnet build -c debug
dotnet publish MyTests\MyTests.csproj -c debug
dotnet vstest artifacts\publish\MyTests\debug\MyTests.dll --collect:"XPlat Code Coverage" --diag:"artifacts\log\debug\test.diag.log;tracelevel=verbose"

repo.zip

[alex-ntk]

Thank you for the instruction, very helpful!

The error is reproducible on my end. The log files attached. The dotnet vstest command produces the same error.

test.diag.host.25-03-25_09-32-19_24233_5.log
test.diag.log
test.diag.datacollector.25-03-25_09-32-06_41069_5.log

[alex-ntk]

C:\Projects\tmp\MySolution> dotnet --list-sdks
8.0.113 [C:\Program Files\dotnet\sdk]
8.0.406 [C:\Program Files\dotnet\sdk]
9.0.200 [C:\Program Files\dotnet\sdk]
C:\Projects\tmp\MySolution> dotnet --list-runtimes
Microsoft.AspNetCore.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.13 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.13 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.13 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 9.0.2 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
C:\Projects\tmp\MySolution>

[Bertk]

Please also check the whether repo.zip project also generates the same error with your environment. Thanks.

My system has:

C:\GitHub>dotnet --list-sdks
6.0.428 [C:\Program Files\dotnet\sdk]
8.0.113 [C:\Program Files\dotnet\sdk]
8.0.407 [C:\Program Files\dotnet\sdk]
9.0.200 [C:\Program Files\dotnet\sdk]
9.0.201 [C:\Program Files\dotnet\sdk]

[Bertk]

Duplicate of #857, #725

[Bertk]

The log files have no additional information but there are similar issues and only reproducible on your systems. This is hard to troubleshoot because individual system have different configuration e.g. virus scanner and so on.

The issues mentioned above have some hints which might help. Please check.

Please also check before the test execution:

dotnet --version
dotnet build-server shutdown

Try also this (from issue 725):

dotnet.exe test MyTests\MyTests.csproj -c debug --collect:"XPlat Code Coverage" --no-build /nodeReuse:false -m:1

[alex-ntk]

Tried: