Failing windows tests on 3.4.0 #2243
Description
See failures here https://github.com/dart-lang/test/actions/runs/9452121663/job/26034666073?pr=2242.
Cannot copy file to 'C:\Users\RUNNER~1\AppData\Local\Temp\dart_test.kernel.4322a797\output.dill', path = 'C:\Users\runneradmin\AppData\Local\Temp\dart_test_fac3c362\.dart_tool\test\incremental_kernel.
There is some issue when trying to copy over the incremental dill file. Notably there is a missing hash after the incremantal_kernel.. This could happen if the package config fails to find the root package (see https://github.com/dart-lang/test/blob/master/pkgs/test_core/lib/src/runner/package_version.dart#L21).
I am not sure if this is the core issue, but it could be related.