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//DIAGNOSTIC_TEST:SIMPLE(filecheck=CHECK): interface IFoo { This foo(); } struct Foo : IFoo { float x; This foo() { This f; f.x = 0.0; return f; } } RWStructuredBuffer<float> output; // CHECK: ([[# @LINE+1]]): error 30401 float compute<T:Foo>(T f) // error, should be IFoo here. { } void main() {}