rust-lang/rust — pull request #18371 by nikomatsakis (2014-10-27 18:04:56+00:00)
Title: Teach variance checker about lifetime bounds from trait object types

Teach variance checker about the lifetime bounds that appear in trait object types.

cc #18262 (this fixes the test case by @jakub- but I am not sure if this is the same issue that @alexcrichton was reporting)

r? @pnkfelix