Lt<'a> lang item (because we don't have DerefMove) - lifetimes for fn!

[quinedot]

@HeroicKatora

But for implementation defined reasons the strictly more specific instantiation/subtype with a non-generic lifetime is not 'static . That's.. odd to say the least and should get fixed. No, the lifetime of the result type has nothing at all to do with the lifetime of the function pointer.

It's from RFC 1214 (not just an implementation detail). A desire to make an exception for function pointers has come up before (IRLO thread). As far as I know an actual RFC has yet to surface though.