[5.3] Fix dynamic member lookup index-while-building crash#32168

Merged

tkremenek merged 2 commits intoswiftlang:release/5.3from

nathawes:dynamic-member-lookup-indexing-crash

Jun 4, 2020

Commits on Jun 3, 2020

[Index] Add regression test case for @dynamicMemberLookup on a protocol.
Nathan Hawes
committed
[Sema] Add null checks in ConstraintSystem::bindOverloadType to prevent a crash during indexing.
Nathan Hawes
committed