| # Updating compile-fail test outputs | |
| `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: | |
| ``` | |
| TRYBUILD=overwrite cargo +beta test --all | |
| ``` | |
| it will run the tests and update the `trybuild` output files. |