2 // compile-flags: -Zunleash-the-miri-inside-of-you
6 // a test demonstrating why we do need to run static const qualification on associated constants
7 // instead of just checking the final constant
13 trait Bar<T, U: Foo<T>> {
14 const F: u32 = (U::X, 42).1;
17 impl Foo<u32> for () {
20 impl Foo<Vec<u32>> for String {
21 const X: Vec<u32> = Vec::new();
24 impl Bar<u32, ()> for () {}
25 impl Bar<Vec<u32>, String> for String {}
28 // this is fine, but would have been forbidden by the static checks on `F`
29 let x = <() as Bar<u32, ()>>::F;
30 // this test only causes errors due to the line below, so post-monomorphization
31 let y = <String as Bar<Vec<u32>, String>>::F; //~ ERROR erroneous constant