Slava Pestov 584f47d025 Sema: Fix crashes in CSDiag ...

- TypeMatchVisitor doesn't like seeing ErrorTypes -- stop if we have one.

- Common logic for replacing type parameters and variables with
  UnresolvedType.

- Fix crash in coerceToType() if one of the two types has an UnresolvedType
  in it, but not at the top level.

Fixes one compiler_crasher and some regressions with upcoming patches.

2017-01-04 01:40:19 -08:00

281 KiB

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