Remove contraction from region inference#29188

Merged

bors merged 8 commits intorust-lang:masterfrom nikomatsakis:remove-contraction

Oct 29, 2015

+182-456

Commits on Oct 28, 2015

do not dump extern def-ids with path for now
nikomatsakis
committed
Remove contraction. The contraction rules predated the notion of an
nikomatsakis
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Regression test for rust-lang#29048 . Fixes rust-lang#29048 .
nikomatsakis
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remove SupSupConflict, which is now dead code
nikomatsakis
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Don't "double check" var-sub-var constraints, which are handled in
nikomatsakis
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Update docs for region inference to reflect current state better
nikomatsakis
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Do some slight refactoring, leave the rest for rust-lang#29436
nikomatsakis
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Move test file to run-fail, since it does an unwrap
nikomatsakis
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