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swift42 BOT 4/2/2019 7:43 AM
stderr:<stdin>:7:46: warning: redundant conformance constraint 'U': 'P' func foo<U, T>(_: U, _: T) where U : C<T>, U : P {} ^ <stdin>:7:36: note: conformance constraint 'U': 'P' implied here func foo<U, T>(_: U, _: T) where U : C<T>, U : P {} ^