Doug Gregor 43931a985c [AST] Record generic signature in BoundNameAliasType. ...

The generic signature used to perform substitutions for a BoundNameAliasType
in ill-formed code might not line up with the generic signature in the
typealias. Separately record the signature we used to build the
BoundNameAliasType to make the AST more robust against such issues.

2018-03-25 20:46:07 -07:00

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