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

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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
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Commits on Apr 24, 2015

fix rustc_driver tests
nikomatsakis
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