-gdt flag is breaking stryker on azure pipelines run on linux agents

Describe the bug

I’m trying to run stryker on a azure pipeline running on an ubuntu agent with a powershell task like this:

  - task: PowerShell@2
    displayName: "Run mutations diff"
    inputs:
      targetType: "inline"
      script: |
        $targetBranchName = "$(System.PullRequest.TargetBranch)" -Replace "refs/heads/",""

        $(Agent.BuildDirectory)/tools/dotnet-stryker -s $(solutionFullName) -cp $(configRelativePath) -diff -gdt 'origin/$targetBranchName'

Yet it simply breaks the task with an exit code 1.

2021-01-26T18:31:28.8622586Z ##[debug] dotnet stryker -s /home/vsts/work/1/s/Template.sln -cp ./files/mutation_tests/stryker-config.json -diff -gdt 'origin/develop'
2021-01-26T18:31:30.2770189Z    _____ _              _               _   _ ______ _______ Â 
2021-01-26T18:31:30.2770667Z   / ____| |            | |             | \ | |  ____|__   __|Â 
2021-01-26T18:31:30.2771130Z  | (___ | |_ _ __ _   _| | _____ _ __  |  \| | |__     | |   Â 
2021-01-26T18:31:30.2771598Z   \___ \| __| '__| | | | |/ / _ \ '__| | . ` |  __|    | |   Â 
2021-01-26T18:31:30.2772269Z   ____) | |_| |  | |_| |   <  __/ |    | |\  | |____   | |   Â 
2021-01-26T18:31:30.2772751Z  |_____/ \__|_|   \__, |_|\_\___|_| (_)|_| \_|______|  |_|   Â 
2021-01-26T18:31:30.2773219Z                    __/ |                                     Â 
2021-01-26T18:31:30.2773677Z                   |___/                                      Â 
2021-01-26T18:31:30.2774195Z 
2021-01-26T18:31:30.2947519Z  Version: 0.21.1 (beta)
2021-01-26T18:31:30.2947772Z 
2021-01-26T18:31:30.6567268Z ##[error]PowerShell exited with code '1'.
2021-01-26T18:31:30.6596189Z ##[section]Finishing: Run mutations diff

Logs

No logs get generated at all.

Expected behavior

I expected stryker to mutated my solution projects with diff enabled and regarding the branch passed as a parameter to the gdt directive.

Desktop (please complete the following information):

• OS: az-agent ubuntu-latest (ubuntu 20.04)
• Type of project: .Net
• Framework Version: .Net 5.0
• Stryker Version: beta 0.21.1

Additional context

When running stryker with the same options on a windows-latest agent everything works as expected. It also works fine if I remove the gdt directive on ubuntu.

[raschmitt]

@Mobrockers I’m gonna have a try tonight [UTC -3].

[rouke-broersma]

@Mobrockers Sorry for the late, I run it just onde but it seems to be working just fine on 0.22.1.

Here is the pipeline where I run it https://dev.azure.com/raschmitt/raschmitt/_build/results?buildId=679&view=results

I think we might close this issue for now.

No problem 😃 Glad to hear it works now!

Now that I think about it I remember this issue is due to using Ubuntu 20. The library we use for git did not have support for Ubuntu 20 and we fixed that in the latest release!