| error: implementation of `FnMut` is not general enough | |
| --> $DIR/higher-ranked-lifetime-error.rs:12:5 | |
| | | |
| LL | assert_all::<_, &String>(id); | |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ implementation of `FnMut` is not general enough | |
| | | |
| = note: `for<'a> fn(&'a String) -> &'a String {id}` must implement `FnMut<(&String,)>` | |
| = note: ...but it actually implements `FnMut<(&'0 String,)>`, for some specific lifetime `'0` | |
| error: aborting due to 1 previous error | |