// Test that we are able to introduce a negative constraint that // `MyType: !MyTrait` along with other "fundamental" wrappers. // aux-build:coherence_copy_like_lib.rs extern crate coherence_copy_like_lib as lib; struct MyType { x: i32 } trait MyTrait { fn foo() {} } impl MyTrait for T { } // Tuples are not fundamental, therefore this would require that // // (MyType,): !MyTrait // // which we cannot approve. impl MyTrait for (MyType,) { } //~^ ERROR E0119 fn main() { }