rust/tests/ui/nll/issue-47470.rs

23 lines
515 B
Rust

// Regression test for #47470: cached results of projections were
// causing region relations not to be enforced at all the places where
// they have to be enforced.
struct Foo<'a>(&'a ());
trait Bar {
type Assoc;
fn get(self) -> Self::Assoc;
}
impl<'a> Bar for Foo<'a> {
type Assoc = &'a u32;
fn get(self) -> Self::Assoc {
let local = 42;
&local //~ ERROR cannot return reference to local variable `local`
}
}
fn main() {
let f = Foo(&()).get();
println!("{}", f);
}