coverlet.msbuild /p:UseSourceLink=true causes exception

[dbolin]

On windows 10, dotnet core 3 preview 5.
Using this repo, running the following command:

dotnet test Tests/Apex.Serialization.Tests/Apex.Serialization.Tests.csproj -f netcoreapp2.2 -c Debug --logger "trx;LogFileName=results.trx" /p:CollectCoverage=true /p:CoverletOutputFormat=cobertura /p:Include="[Apex.]" /p:UseSourceLink=true

Fails after printing "Calculating coverage result..." with the error "The given key '' was not present in the dictionary." at at Coverlet.Core.Coverage.GetSourceLinkUrl(Dictionary`2 sourceLinkDocuments, String document)

Everything works as expected if the UseSourceLink switch is omitted.

[MarcoRossignoli]

@dbolin you can try our nightly build, it should fix your issue https://www.myget.org/feed/coverlet-dev/package/nuget/coverlet.msbuild/2.6.1-g0dd56242f2

[josuuribe]

Hi, I have the exact same issue in Azure DevOps with the last version available, I do not use Sonnar or any other third party tool, it's easy to reproduce:

1. Use the default Azure Build Pipeline .Net Core template (like Asp.Net Core)
2. Use these arguments in Azure DevOps .net core task:

--no-build --configuration $(BuildConfiguration) /p:CollectCoverage=true /p:Threshold=85 /p:UseSourceLink=true /p:CoverletOutputFormat=cobertura /p:CoverletOutput=$(Build.SourcesDirectory)/TestResults/Coverage/

Thanks,

[MarcoRossignoli]

@josuuribe pls can you open new issue?