Add hints when intercrate ambiguity causes overlap.#43426

Merged

bors merged 9 commits intorust-lang:masterfrom

qnighy:intercrate-ambiguity-hints

Sep 6, 2017

Commits on Sep 5, 2017

Add hints when intercrate ambiguity causes overlap.

qnighy
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nikomatsakis
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Slightly modify hint messages.

qnighy
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nikomatsakis
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Add tests for intercrate ambiguity hints.

qnighy
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nikomatsakis
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Fix a very subtle mistake in a ui test.

qnighy
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nikomatsakis
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Unify intercrate ambiguity emitters into a function.

qnighy
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nikomatsakis
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Print more detailed trait-ref for intercrate ambiguity.

qnighy
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nikomatsakis
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Add downstream tests for intercrate ambiguity hints.

qnighy
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nikomatsakis
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Fix misdetection of upstream intercrate ambiguity.

qnighy
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nikomatsakis
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factor out helper method
nikomatsakis
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