[BUG]: PublishCodeCoverageResults@2 Error occured while parsing coverage files. System.InvalidOperationException: Nullable object must have a value.

[Aerodynamite]

New issue checklist

• I searched for existing GitHub issues
• I read pipeline troubleshooting guide
• I checked how to collect logs

Task name

PublishCodeCoverageResults

Task version

2.248.3

Issue Description

Publishing code coverage stopped working in version 2.248.3 with error Error occured while parsing coverage files. System.InvalidOperationException: Nullable object must have a value.

I have a build from a couple of days ago which worked and was using version 2.242.1 of the task. Running the pipeline from the exact same commit today fails with the only difference being the new task version.

Environment type (Please select at least one enviroment where you face this issue)

• Self-Hosted
• Microsoft Hosted
• VMSS Pool
• Container

Azure DevOps Server type

dev.azure.com (formerly visualstudio.com)

Azure DevOps Server Version (if applicable)

No response

Operation system

ubuntu-latest

Relevant log output

2024-11-19T13:59:02: Creating report 621/622 (Assembly: MyModule.Application, Class: MyModule.Application.MyModuleApplicationAssemblyMarker)
2024-11-19T13:59:02: Writing report file 'MyModule.Application_MyModuleApplicationAssemblyMarker.html'
2024-11-19T13:59:02: Creating report 622/622 (Assembly: MyModule.Application, Class: MyModule.Application.MyModuleMappingProfile)
2024-11-19T13:59:02: Writing report file 'MyModule.Application_MyModuleMappingProfile.html'
2024-11-19T13:59:02: Creating summary
2024-11-19T13:59:02: Writing report file '/home/vsts/work/_temp/5011078a-bc1a-4766-afe9-f0f7048b5a65/index.html'
##[error]Error occured while parsing coverage files. System.InvalidOperationException: Nullable object must have a value.
   at System.Nullable`1.get_Value()
   at Microsoft.Azure.Pipelines.CoveragePublisher.Parsers.ReportGeneratorTool.GetFileCoverageInfos() in D:\a\1\s\src\CoveragePublisher\Parsers\CoverageParserTools\ReportGeneratorTool.cs:line 63
   at Microsoft.Azure.Pipelines.CoveragePublisher.Parsers.Parser.GetFileCoverageInfos() in D:\a\1\s\src\CoveragePublisher\Parsers\Parser.cs:line 35

Full task logs with system.debug enabled

No response

Repro steps

[Aerodynamite]

I notice the Microsoft Hosted Agents have reverted the task version back to 2.248.1, which does not seem to have this issue.

[jdngray77]

We've also seen the same issue today in production, and have also since that the task version has since been reverted back to 2.248.1, fixing our build.

I think this issue however can probably be closed, as i think the fix for this went in 4 days ago in !79 in this commit

[vinayakmsft]

Task version is reverted to 2.248.1, which does not have the issue.