Introduce a `FreeRegionMap` to store relations between free regions#24553

Merged

bors merged 2 commits intorust-lang:masterfrom

nikomatsakis:issue-22779-overconstrained-impl

Apr 24, 2015

Commits on Apr 18, 2015

Rather than storing the relations between free-regions in a global
nikomatsakis
committed

Commits on Apr 24, 2015

fix rustc_driver tests
nikomatsakis
committed