rust-lang/rust — pull request #19821 by bkoropoff (2014-12-13 23:00:42+00:00)
Title: Handle higher-rank lifetimes when generating type IDs

Normalize late-bound regions in bare functions, stack closures, and traits and include them in the generated hash.

Closes #19791

r? @nikomatsakis (does my normalization make sense?)
cc @alexcrichton