Slava Pestov 42a3ad3bf0 AST: Fix over-eager collapseSpecializedConformance() ...

It's possible that the conforming type is equal to the generic
conformance type, but some of the substitutions replace an
abstract conformance with a concrete one.

In this case we cannot collapse away the specialized conformance,
because we lose information that way.

Fixes <rdar://problem/40164371>.

2018-07-17 14:41:49 -07:00

602 B

Raw Blame History

View Raw