Avoid false ambiguity in multidispatch trait resolution#18022

Merged

bors merged 2 commits intorust-lang:masterfrom

nikomatsakis:issue-18019

Oct 18, 2014

Commits on Oct 13, 2014

Only consider impliciy unboxed closure impl if the obligation is
nikomatsakis
committed

Commits on Oct 17, 2014

Correct a test. The error message changed because, with this fix, we
nikomatsakis
committed