Hamish Knight aa0ad55706 [CS] Don't leave key path with holes unsolved ...

We currently leave a key path constraint unsolved
if one of its components hasn't yet had its
overload resolved. However, for e.g a missing
member component, the overload type variable will
be bound to a hole and an overload will never be
resolved.

Tweak the logic to consider the key path constraint
trivially solved if one of its components has been
marked as a hole, which will allow the key path
type itself to be marked as a hole.

Resolves SR-12437 & SR-12823.
Resolves rdar://62201037.

2020-05-16 16:52:35 -07:00

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