[coverlet] Unable to instrument module - NET 5 - Microsoft.Extensions.Logging.Abstractions

For some test projects, but not all, we get

/home/AzDevOps/.nuget/packages/coverlet.msbuild/3.1.0/build/coverlet.msbuild.targets(39,5): warning : [coverlet] Unable to instrument module: MyApi.dll because : AssemblyResolutionException for ‘Microsoft.Extensions.Logging.Abstractions, Version=5.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60’. Try to add <PreserveCompilationContext></PreserveCompilationContext> to test projects </PropertyGroup> or pass '/p:CopyLocalLockFileAssemblies=’ option to the ‘dotnet test’ command-line

Tried:

• Adding <PreserveCompilationContext>true</PreserveCompilationContext> to csprojs
• Also pass /p:CopyLocalLockFileAssemblies=true to dotnet test
• Included a package reference to Microsoft.Extensions.Logging.Abstractions directly in the test projects.
• upgrade coverlet from 3.0.3 to 3.1.0

Related:

• https://github.com/coverlet-coverage/coverlet/issues/1098 (but I can’t use preview packages),
• https://github.com/coverlet-coverage/coverlet/issues/1221 (no solution yet)
• https://github.com/coverlet-coverage/coverlet/issues/1102 (copy to publish not possible for us)
• probably more issues

PS I hope this helps to diagnose the issue https://github.com/coverlet-coverage/coverlet/issues/1196. I have run more than 10 builds (with 10 tries), but all have the same issue 😦

[304NotModified]

It’s a ASP.NET Core 5 application with multiple projects.

I’m afraid it will take some time to create a repro.

[MarcoRossignoli]

Hi @304NotModified thanks for reporting this. We’ll take a look asap.