mozilla/rust — pull request #4537 by catamorphism (2013-01-19 05:04:12+00:00)
Title: Handle supertrait calls in default methods

r? @graydon Add a new method_super origin for supertrait methods. Also make
coherence create a table that maps pairs of trait IDs and self types
to impl IDs, so that it's possible to check a supertrait method
knowing only its index in its trait's methods (without knowing all
supertraits for a given trait).

As per #3979