Pavel Yaskevich 22fb079373 [ConstraintSystem] Don't let conditional conformances shadow members accessible through dynamic lookup ...

Currently if there is a conditional conformance to a type marked
as `@dynamicMemberLookup` with member that shadows one accessible
through dynamic lookup we'd report an error if that conformance
has not been satisfied.

Better behavior would be to consider dynamic member lookup and
if that fits let the expression type-check.

Resolves: rdar://problem/52779809

2019-07-10 15:31:24 -07:00

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