1# Updating compile-fail test outputs 2 3`bitflags` uses the `trybuild` crate to integration test its macros. Since Rust error messages change frequently enough that `nightly` builds produce spurious failures, we only check the compiler output in `beta` builds. If you run: 4 5``` 6TRYBUILD=overwrite cargo +beta test --all 7``` 8 9it will run the tests and update the `trybuild` output files. 10