rust/tests/ui/span/wf-method-late-bound-regions.rs
2023-01-11 09:32:08 +00:00

25 lines
615 B
Rust

// A method's receiver must be well-formed, even if it has late-bound regions.
// Because of this, a method's substs being well-formed does not imply that
// the method's implied bounds are met.
struct Foo<'b>(Option<&'b ()>);
trait Bar<'b> {
fn xmute<'a>(&'a self, u: &'b u32) -> &'a u32;
}
impl<'b> Bar<'b> for Foo<'b> {
fn xmute<'a>(&'a self, u: &'b u32) -> &'a u32 { u }
}
fn main() {
let f = Foo(None);
let f2 = f;
let dangling = {
let pointer = Box::new(42);
f2.xmute(&pointer)
};
//~^^ ERROR `pointer` does not live long enough
println!("{}", dangling);
}