Doug Gregor 4097428df9 [Constraint solver] Declarations with IUOs don’t have effective overload types ...

A declaration with an implicitly-unwrapped optional essentially has two
effective overload types, because the result might be optional or it might
have been forced. Disable computation of the effective overload type in this
case.

2019-03-01 09:45:24 -08:00

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