The path is empty. (Parameter 'path')

[Adam-RapidRTC]

Having an issue generating the report. The project is SDK format but references older projects. When I run'

(actual paths omitted)
dotnet test "....csproj" --configuration Release --filter Category!=IntegrationTest --logger:trx --results-directory "...\TestResults" --settings "....runsettings" /p:CollectCoverage=true /p:CoverletOutputFormat=cobertura /p:CoverletOutput="....Tests.cobertura.xml"

I get the following error

Calculating coverage result...
Generating report '....Tests.cobertura.xml'
....nuget\packages\coverlet.msbuild\2.8.0\build\coverlet.msbuild.targets(36,5): error : The path is empty. (Parameter 'path') [....Tests.csproj]
...nuget\packages\coverlet.msbuild\2.8.0\build\coverlet.msbuild.targets(36,5): error : at System.IO.Path.GetFullPath(String path) [...Tests.csproj]
....nuget\packages\coverlet.msbuild\2.8.0\build\coverlet.msbuild.targets(36,5): error : at System.IO.Directory.GetDirectoryRoot(String path) [....Tests.csproj]
....nuget\packages\coverlet.msbuild\2.8.0\build\coverlet.msbuild.targets(36,5): error : at System.Linq.Lookup2.Create(IEnumerable1 source, Func2 keySelector, IEqualityComparer1 comparer) [....Tests.csproj]
...nuget\packages\coverlet.msbuild\2.8.0\build\coverlet.msbuild.targets(36,5): error : at System.Linq.GroupedEnumerable2.GetEnumerator() [...Tests.csproj] ...\.nuget\packages\coverlet.msbuild\2.8.0\build\coverlet.msbuild.targets(36,5): error : at System.Linq.Enumerable.SelectEnumerableIterator2.ToList() [...Tests.csproj]
....nuget\packages\coverlet.msbuild\2.8.0\build\coverlet.msbuild.targets(36,5): error : at Coverlet.Core.Reporters.CoberturaReporter.Report(CoverageResult result) in D:\git\coverletToRelease\src\coverlet.core\Reporters\CoberturaReporter.cs:line 34 [...Tests.csproj]
C:\Users\aharris.nuget\packages\coverlet.msbuild\2.8.0\build\coverlet.msbuild.targets(36,5): error : at Coverlet.MSbuild.Tasks.ReportWriter.WriteReport() in D:\git\coverletToRelease\src\coverlet.msbuild.tasks\ReportWriter.cs:line 50 [....Tests.csproj]
....nuget\packages\coverlet.msbuild\2.8.0\build\coverlet.msbuild.targets(36,5): error : at Coverlet.MSbuild.Tasks.CoverageResultTask.Execute() in D:\git\coverletToRelease\src\coverlet.msbuild.tasks\CoverageResultTask.cs:line 145 [...Tests.csproj]

This works for several other projects in the solution that don't have a reference to older projects.

I also noticed I get these warnings when building:

....nuget\packages\coverlet.msbuild\2.8.0\build\coverlet.msbuild.targets(7,5): warning : [coverlet] Unable to instrument module: ...Tests\bin\Debug\net472\Microsoft.ReportViewer.Common.dll because : No symbol found for file: ....Tests\bin\Debug\net472\Microsoft.ReportViewer.Common.dll [....Tests.csproj]
...\aharris.nuget\packages\coverlet.msbuild\2.8.0\build\coverlet.msbuild.targets(7,5): warning : [coverlet] Unable to instrument module: ....Tests\bin\Debug\net472\Microsoft.ReportViewer.WebForms.dll because : No symbol found for file: ....Tests\bin\Debug\net472\Microsoft.ReportViewer.WebForms.dll [....Tests.csproj]

[MarcoRossignoli]

Hi Adam,

thank's for reporting this, can you try to generate a small repro?

@daveMueller seem an issue here https://github.com/tonerdo/coverlet/blob/master/src/coverlet.core/Reporters/CoberturaReporter.cs#L166 do you have any idea?

I also noticed I get these warnings when building:

Warnings are ok...we cannot instrument dll without local source so they're expected.

[MarcoRossignoli]

@Adam-RapidRTC despite bug, can you try with collectors you already use runsettings, vstest integration is the better way to consume coverlet at the moment https://github.com/tonerdo/coverlet/blob/master/Documentation/VSTestIntegration.md

Never mind...you're on .NET Framework not .NET Core one.

[MarcoRossignoli]

@Adam-RapidRTC can you try to run in debug mode and tell me if the issue is still present?
I found the place of the issue, btw I'd like to understand how it's possible, seem that pdb for some project reports empty path file.
We can fix this particular issue inside report generation, but I'd like to understand why that empty path exists.

Are you able to create a small repro?

[Adam-RapidRTC]

@MarcoRossignoli I will see if I can carve out some time today and create a sample repo that recreates the problem.

[MarcoRossignoli]

Thanks a lot!

[daveMueller]

@daveMueller seem an issue here https://github.com/tonerdo/coverlet/blob/master/src/coverlet.core/Reporters/CoberturaReporter.cs#L166 do you have any idea?

Yes seems the CoverageResult has a Document with a empty path. I could add a check for this but I'm not sure if the CoberturaReporter is the right place for this.
I guess the other reporters could also have a problem with such a CoverageResult.
So @Adam-RapidRTC a repro would help a lot to tackle this issue.

[Adam-RapidRTC]

@daveMueller @MarcoRossignoli - Sorry for the delay but I'll work on getting that demo repo up for you today.

[MarcoRossignoli]

No prob no rush at your pace, thanks.

[MarcoRossignoli]

@Adam-RapidRTC any news?

[NerdBrez]

Any update about this issue?

[daveMueller]

@NerdBrez Are you facing the same issue with cobertura report? Could you create a small repro?

[NerdBrez]

Yes, I'm trying to generate a report on my xUnit test. The test project references an .Net framework 4.7.2 web application and performs 8 tests on some MVC controllers.
The tests pass but then coverlet raises the errors when generating the reports:

dotnet test lqe.web.test --framework net472 --no-build /p:CollectCoverage=true /p:CoverletOutput=../TestResults/Coverage/ /p:MergeWith="../TestResults/Coverage/coverage.json" /p:CoverletOutputFormat="cobertura,json" -m:1

C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] BadImageFormatException during MetadataReaderProvider.FromPortablePdbStream in InstrumentationHelper.PortablePdbHasLocalSource, unable to check if module has got local source. [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(31,5): warning : [coverlet] Unable to instrument module: C:\Repos\Lqe\Code\Lqe\lqe.web.test\bin\Debug\Microsoft.Web.Infrastructure.dll because : No symbol found for file: C:\Repos\Lqe\Code\Lqe\lqe.web.test\bin\Debug\Microsoft.Web.Infrastructure.dll [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
Série de tests pour C:\Repos\Lqe\Code\Lqe\lqe.web.test\bin\Debug\Lqe.Web.Test.dll(.NETFramework,Version=v4.7.2)
Outil en ligne de commande d'exécution de tests Microsoft (R), version 16.8.1
Copyright (c) Microsoft Corporation. Tous droits réservés.

Démarrage de l'exécution de tests, patientez...
Au total, 1 fichiers de test ont correspondu au modèle spécifié.

Réussi! - Failed: 0, Passed: 8, Skipped: 0, Total: 8, Duration: 1 s- Lqe.Web.Test.dll (net472)

Calculating coverage result...
Generating report '..\TestResults\Coverage\coverage.cobertura.xml'
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(60,5): error : The path is empty. (Parameter 'path') [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(60,5): error : at System.IO.Path.GetFullPath(String path) [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(60,5): error : at System.IO.Directory.GetDirectoryRoot(String path) [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(60,5): error : at System.Linq.Lookup2.Create(IEnumerable1 source, Func2 keySelector, IEqualityComparer1 comparer) [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(60,5): error : at System.Linq.GroupedEnumerable2.GetEnumerator() [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj] C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(60,5): error : at System.Linq.Enumerable.SelectEnumerableIterator2.ToList() [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(60,5): error : at Coverlet.Core.Reporters.CoberturaReporter.Report(CoverageResult result) in //src/coverlet.core/Reporters/CoberturaReporter.cs:line 34 [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(60,5): error : at Coverlet.MSbuild.Tasks.ReportWriter.WriteReport() in //src/coverlet.msbuild.tasks/ReportWriter.cs:line 50 [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]
C:\Repos\Lqe\Code\Lqe\packages\coverlet.msbuild.2.9.0\build\coverlet.msbuild.targets(60,5): error : at Coverlet.MSbuild.Tasks.CoverageResultTask.Execute() in /_/src/coverlet.msbuild.tasks/CoverageResultTask.cs:line 148 [C:\Repos\Lqe\Code\Lqe\lqe.web.test\Lqe.Web.Test.csproj]