rust/tests/ui/nll/issue-54943-3.rs
2023-01-11 09:32:08 +00:00

20 lines
577 B
Rust

// check-pass
// FIXME(#54943) This test targets the scenario where proving the WF requirements requires
// knowing the value of the `_` type present in the user type annotation - unfortunately, figuring
// out the value of that `_` requires type-checking the surrounding code, but that code is dead,
// so our NLL region checker doesn't have access to it. This test should actually fail to compile.
#![allow(warnings)]
use std::fmt::Debug;
fn foo<T: 'static + Debug>(_: T) { }
fn bar<'a>() {
return;
let _x = foo::<Vec<_>>(Vec::<&'a u32>::new());
}
fn main() {}