mozilla/rust — pull request #13333 by Ryman (2014-04-05 01:28:28+00:00)
Title: librustc: Improve error message for incompatible trait method signatures...

This can be a frustrating error message, ideally we should print the signature mismatch, but hinting that it's a trait incompatibility helps tracking root cause. Also beefed up the testcases for this.

Ideally we would print the signature mismatch in the error helper?