Error running all library tests

[mrj001]

Built as follows:

$ ./build.cmd -subset clr -c Checked
$ ./build.cmd -subset Libs+Libs.Tests -runtimeConfiguration Checked

Then I tried to run all tests from root as follows (per a comment by @ViktorHofer in Issue #34152):

$ ./build.cmd libs.tests -test -coverage -runtimeConfiguration Checked

This ended quickly in the following error:

Build FAILED.

C:\Users\mrj00\source\repos\runtime\eng\testing\coverage.targets(42,7): error MSB4184: The expression ""C:\Users\mrj00\source\repos\runtime\src\libraries".SubString(50)" cannot be evaluated. startIndex cannot be larger than length of string. (Parameter 'startIndex') [C:\Users\mrj00\source\repos\runtime\Build.proj]
0 Warning(s)
1 Error(s)

Time Elapsed 00:00:23.25
Build failed.
Some builds failed:
Configuration: Debug, Architecture: x64

Tagging subscribers to this area: @safern, @ViktorHofer
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[ViktorHofer]

This will be fixed with #35285

[danmoseley]

What command should @mrj001 use meantime?

[ViktorHofer]

A workaround meanwhile would be to change this line: https://github.com/dotnet/runtime/blob/master/eng/testing/coverage.targets#L21 to
<Target Name="SetupCoverageFilter" Condition="'$(MSBuildProjectFile)' != 'tests.proj'">

[mrj001]

@ViktorHofer
I got 256 errors all similar to this:

C:\Users\mrj00\source\repos\runtime\eng\testing\tests.targets(102,24): error MSB4113: Specified condition "'$(TargetsMobile)'" evaluates to "" instead of a boolean. [C:\Users\mrj00\source\repos\runtime\src\libraries\Common\tests\Common.Tests.csproj]

Is there an expected date for that PR to be applied?

[ViktorHofer]

cc @steveisok for the broken TargetsMobile condition.

Yes, the change will be merged next Monday.

[steveisok]

We'll have a PR up for that $(TargetsMobile) check shortly. If you need to work around it, just put '$(TargetsMobile)' == 'true' for the time being.

[steveisok]

PR is up #35709