// Test that free regions ordering only goes one way. That is, // we have `&'a Node<'b, T>`, which implies that `'a <= 'b`, // but not `'b <= 'a`. Hence, returning `&self.val` (which has lifetime // `'a`) where `'b` is expected yields an error. // // This test began its life as a test for issue #4325. struct Node<'b, T: 'b> { val: T, next: Option<&'b Node<'b, T>> } impl<'b, T> Node<'b, T> { fn get<'a>(&'a self) -> &'b T { match self.next { //~ ERROR lifetime may not live long enough Some(ref next) => next.get(), None => &self.val } } } fn main() {}