Safe Keyword undescriptive errors

[ionicmc-rs]

Code

safe unsafe extern {
   // Code is irrelevant
}
// And
unsafe safe extern {
   // Code is irrelevant
}

Current output

help: `unsafe` must come before `safe`: `unsafe safe`
# And
help: `safe` must come before `unsafe`: `safe unsafe`

Desired output

# Either an error about how safe isn't stabilized (if it isn't) or something more descriptive
the keyword `safe` is unstable
# ...

Rationale and extra context

the same happens with nightly releases

Other cases

// Nope

Rust Version

binary: rustc
commit-hash: f6e511eec7342f59a25f7c0534f1dbea00d01b14
commit-date: 2024-10-15
host: x86_64-unknown-linux-gnu
release: 1.82.0
LLVM version: 19.1.1

Anything else?

i was just messing around when i found out safe was a valid keyword, but then i got an infinite loop of reversing the order of safe and unsafe