[Bug rust/114629] rust-ast-resolve-expr contains bloated code for funny_error

[dkm at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114629

--- Comment #7 from Marc Poulhiès <dkm at gcc dot gnu.org> ---
There's no language spec yet, it's WIP:
https://github.com/rust-lang/rust/issues/113527

Currently, the reference is rustc and the goal is to match its current
behavior.

I think the frontend is not listed because it's currently not
enabled/working-enough.