rust/tests/ui/nll/issue-55401.rs

fn static_to_a_to_static_through_ref_in_tuple<'a>(x: &'a u32) -> &'static u32 {
    let (ref y, _z): (&'a u32, u32) = (&22, 44);
    *y //~ ERROR
}

fn main() {}
Support user type annotations in `ref` bindings. This commit adds support for user type annotations in variables declared using `ref` bindings. When a variable declared using a `ref` binding, then the `LocalDecl` has the type `&T` where the `&` was introduced by the `ref` binding but the canonicalized type annotation has only a `T` since the reference is implicit with the `ref` binding. Therefore, to support type annotations, the canonicalized type annotation either needs wrapped in a reference, or the `LocalDecl` type must have a wrapped reference removed for comparison. It is easier to remove the outer reference from the `LocalDecl` for the purpose of comparison, so that is the approach this commit takes. 2018-11-25 14:14:39 +00:00			`fn static_to_a_to_static_through_ref_in_tuple<'a>(x: &'a u32) -> &'static u32 {`
			`let (ref y, _z): (&'a u32, u32) = (&22, 44);`
			`*y //~ ERROR`
			`}`

			`fn main() {}`