ICE on trait with mixed lifetimes

[malbarbo]

This code generates

trait Y<'a>: Sized {
    fn f(&'a self) {
    }

    fn g(&self) where Self: for<'r> Y<'r> {
        self.f();
    }
}

this ICE

<anon>:6:14: 6:17 error: internal compiler error: coherence failed to report ambiguity: cannot locate the impl of the trait `Y<'_>` for the type `Self`
<anon>:6         self.f();
                      ^~~
note: the compiler unexpectedly panicked. this is a bug.
note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports
note: run with `RUST_BACKTRACE=1` for a backtrace
thread 'rustc' panicked at 'Box<Any>', ../src/libsyntax/diagnostic.rs:176


playpen: application terminated with error code 101

[frewsxcv]

for the lazy: playpen link

[frewsxcv]

reduced:

trait Y<'a>: Sized {
    fn g() where Self: for<'r> Y<'r> {
    }
}

fn main() {}

playpen link

EDIT: this appears to only be failing in nightly

[arielb1]

Duplicate of #24424