// RUN: %target-typecheck-verify-swift -warn-redundant-requirements

// rdar://problem/23149063
protocol P0 { }

protocol P {
  associatedtype A
}

protocol Q : P {
  associatedtype A
}

func f<T>(t: T) where T : P, T : Q, T.A : P0 { } // expected-note{{'f(t:)' previously declared here}}
// expected-warning@-1{{redundant conformance constraint 'T' : 'P'}}

func f<T>(t: T) where T : Q, T : P, T.A : P0 { } // expected-error{{invalid redeclaration of 'f(t:)'}}
// expected-warning@-1{{redundant conformance constraint 'T' : 'P'}}