Describe the Bug

I'm analyzing pyrefly on various packages and encountered a crash in tests/data/miscellaneous/async_as_identifier.py from their github repo.

Minimal repro:
async = lambda: None

which will crash in pyrefly

Sandbox Link

https://pyrefly.org/sandbox/?project=N4IgZglgNgpgziAXKOBDAdgEwEYHsAeAdAA4CeSIqcp6AxgAQC89UqAttpqovQHK7oYIADQgArgBdocEuUQgAxPQCqUqBAml6YMXSkC4AHXTHMMMNtwAnNqgkB9dGI4wrACnw8I6CQEp6ALQAfPRwElaIxvTR9FYwEmJW6NqGILzO2K48wPgAvqnGIiBkcWBQpIQSuGxQFEoACqSl5aEYOAT0tAKQAOaJdhAChMZKAMowMPQAFhISxHCIAPSLJeblhNY9izDoi5i4tHCLXei9-fq7llb0qABuqNCo2LCd3RB9VgMC9LjEFzLGMgSKYCAK3VxwQbJZipADMhAAjAAmAroEC5USoWhScEAMWgQnkaCweCIZHRQA

(Only applicable for extension issues) IDE Information

No response