Tree is broken with a possible out of band failure.
https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket/8700204160740794833/+/u/luci_generate/stdout

https://flutter.googlesource.com/infra/+blame/refs/heads/main/config/lib/ci_yaml/ci_yaml.star#345

Code in question is outside of the tree.