1 error[E0308]: mismatched types
2 --> $DIR/regions-lifetime-bounds-on-fns.rs:20:43
4 LL | let _: fn(&mut &isize, &mut &isize) = a;
5 | ---------------------------- ^ expected concrete lifetime, found bound lifetime parameter
9 = note: expected fn pointer `for<'r, 's, 't0, 't1> fn(&'r mut &'s isize, &'t0 mut &'t1 isize)`
10 found fn item `for<'r, 's> fn(&'r mut &isize, &'s mut &isize) {a::<'_, '_>}`
12 error: aborting due to previous error
14 For more information about this error, try `rustc --explain E0308`.