| // Regression test for #54302. |
| // |
| // We were incorrectly using the "evaluation cache" (which ignored |
| // region results) to conclude that `&'static str: Deserialize`, even |
| // though it would require that `for<'de> 'de: 'static`, which is |
| // clearly false. |
| |
| trait Deserialize<'de> {} |
| |
| trait DeserializeOwned: for<'de> Deserialize<'de> {} |
| impl<T> DeserializeOwned for T where T: for<'de> Deserialize<'de> {} |
| |
| // Based on this impl, `&'static str` only implements Deserialize<'static>. |
| // It does not implement for<'de> Deserialize<'de>. |
| impl<'de: 'a, 'a> Deserialize<'de> for &'a str {} |
| |
| fn main() { |
| fn assert_deserialize_owned<T: DeserializeOwned>() {} |
| assert_deserialize_owned::<&'static str>(); //~ ERROR |
| |
| // It correctly does not implement for<'de> Deserialize<'de>. |
| // fn assert_hrtb<T: for<'de> Deserialize<'de>>() {} |
| // assert_hrtb::<&'static str>(); |
| } |
