Doug Gregor 161f309975 Improve recursion-breaking when resolving type witnesses. ...

Specifically track when we're resolving type witnesses for a given
conformance, and refuse to recursively attempt to resolve those type
witnesses. The standard library patch in rdar://problem/21789238
triggers this, and isolating it in a small test case has proven
illusive.

Swift SVN r30160

2015-07-13 20:06:57 +00:00

55 KiB

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