need-crate-arg-ignore-tidy$x.stderr

error: invalid character `'$'` in crate name: `need_crate_arg_ignore_tidy$x`
   |
   = help: you can either pass `--crate-name` on the command line or add `#![crate_name="…"]` to set the crate name

error: aborting due to 1 previous error