Comment # 8 on bug 1153314 from Richard Biener

(In reply to Tom de Vries from comment #7)
> (In reply to Richard Biener from comment #6)
> > > So the fallback is used, the compiler generates a legacy description of the
> > > enum, which contains a bug, and the incorrect value is printed.
> > 
> > Is "the compiler" the rust compiler?
> 
> Yes.
> 
> > If so then fix it.  LLVM is not a
> > supported compiler (but only the engine Mesa happens to use).
> 
> Right, that, or have rustc use the bundled llvm.

That sounds even better (for both maint of rust and "our" copy of llvm).