swift

8d3f3617 - [CSSimplify] Fix should propagate contextual type into optional chain with leading-dot syntax

[CSSimplify] Fix should propagate contextual type into optional chain with leading-dot syntax Member chains with leading-dot syntax can infer the base type only from context, so optionality mismatch with the contextual type should propagate object type down the chain. (cherry picked from commit 7b9cffd40a2e51dfeadc7e57dec51d4264e69adf)