3 line ICE on stable and nightly (Unexpected type in full type resolver)

[tupshin]

the following generates a compiler error on all current versions:

trait A<T>: std::ops::Add +Sized  {}
trait B<T>: A<T> {}
trait C<T>: A<B<T, Output = usize>> {}

RUST_BACKTRACE hangs for me, but emits:
error: internal compiler error: ../src/librustc/infer/resolve.rs:132: Unexpected type in full type resolver: FreshTy(0)
https://is.gd/lkcWgT

This is greatly cut down from a real world example, and a blocking issue for me

[est31]

This is a regression of the 1.4.0 release (over 1.3.0) of rust.

[nikomatsakis]

triage: P-medium

Pretty old regression, barely qualifies. =) However, @arielb1 says he has a fix.

[est31]

Oh sorry, disregary my comment above, the issue is reproducible on 1.3.0 as well as on stable 1.0.0. Its not a regression, at least not one from a stable rust release.