1 // compile-flags: -Zunleash-the-miri-inside-of-you
4 // a test demonstrating why we do need to run static const qualification on associated constants
5 // instead of just checking the final constant
11 trait Bar<T, U: Foo<T>> {
12 const F: u32 = (U::X, 42).1; //~ WARN skipping const checks
15 impl Foo<u32> for () {
18 impl Foo<Vec<u32>> for String {
19 const X: Vec<u32> = Vec::new();
22 impl Bar<u32, ()> for () {}
23 impl Bar<Vec<u32>, String> for String {}
26 // this is fine, but would have been forbidden by the static checks on `F`
27 let x = <() as Bar<u32, ()>>::F;
28 // this test only causes errors due to the line below, so post-monomorphization
29 let y = <String as Bar<Vec<u32>, String>>::F; //~ ERROR erroneous constant