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linux_host_engine, linux_unopt and mac_host_engine are failing the following command:

/b/s/w/ir/cache/builder/src/out/ci/host_debug_unopt/dart-sdk/bin/dart --disable-dart-dev /b/s/w/ir/cache/builder/src/flutter/tools/clang_tidy/test/header_filter_regex_test.dart
  Command "/b/s/w/ir/cache/builder/src/out/ci/host_debug_unopt/dart-sdk/bin/dart --disable-dart-dev /b/s/w/ir/cache/builder/src/flutter/tools/clang_tidy/test/header_filter_regex_test.dart" exited with code 255.

I am not entirely sure if these test rely on main or the specific branch, and the only recent commit that I can find that may be related is: 8bcf638

cherry-picking for science, will revert afterward.

Any ideas @christopherfujino?

CC: @matanlurey

We should add a failure reason to this expectation: 8bcf638#diff-4b985d2a9688539b821af5a865e52e7e4eb2ef4cb6784229ef304feb33c7099dR68

My guess would be that this test is getting confused due to buildmoot-related directory shifting combined with infra caching issues(?). But yeah this test should definitely print more info when it fails.