swift

08156ec2 - [Sema] Add defensive guard for implicit use of self in closure check

[Sema] Add defensive guard for implicit use of self in closure check Add assetion along with defensive guard to avoid crashing in release build. Hopefully, sourcekitd Stress Tester find a reproducer for the crash. rdar://problem/47895109 (cherry picked from commit ce30a72e2ae2f45074ce9e76cbcbf94b982df95f)