swift

09968d2e - [Diagnostics] Do more checking before recording `force downcast` fix

[Diagnostics] Do more checking before recording `force downcast` fix Solver should do more checking upfront before recording `force downcast` fix, to make sure that it's indeed always applicable when recorded, otherwise it would be possible to misdiagnose or omit diagnostics in certain situations. Resolves: rdar://problem/65254452 (cherry picked from commit d89c096af75524dd5e1cf7bc2d1d0fb43997db9c)