Description

#71003 added a basic error matcher for Clang errors but missed fatal errors, such as when a header is not found:

/path/to/my_app/linux/my_application.cc:10:10: fatal error: 'non_existent.h' file not found

This PR was split off from #72196.

Related Issues

#33584

Tests

I updated the following tests:

• test/commands.shard/hermetic/build_linux_test.dart

Checklist

• I read the [Contributor Guide] and followed the process outlined there for submitting PRs.
• I signed the [CLA].
• I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement].
• I read the [Tree Hygiene] wiki page, which explains my responsibilities.
• I updated/added relevant documentation (doc comments with ///).
• All existing and new tests are passing.
• The analyzer (flutter analyze --flutter-repo) does not report any problems on my PR.
• I am willing to follow-up on review comments in a timely manner.

Breaking Change

• No, no existing tests failed, so this is not a breaking change.
• Yes, this is a breaking change. If not, delete the remainder of this section.