swift

5171b84d - [CS] Replace UnresolvedType with ErrorType in `simplifyType`/`resolveType`

[CS] Replace UnresolvedType with ErrorType in `simplifyType`/`resolveType` This means we now either produce a bare ErrorType, or an ErrorType with a generic parameter original type for a generic parameter hole. We ought to further consolidate this logic by sinking the generic parameter original type replacement into `simplifyType` itself, but I'm leaving that for a future patch since it affects completion results and I want to try keep this close to NFC.