1 error[E0308]: mismatched types
2 --> $DIR/region-lifetime-bounds-on-fns-where-clause.rs:30:43
4 LL | let _: fn(&mut &isize, &mut &isize) = a; //~ ERROR mismatched types
5 | ^ expected concrete lifetime, found bound lifetime parameter
7 = note: expected type `for<'r, 's, 't0, 't1> fn(&'r mut &'s isize, &'t0 mut &'t1 isize)`
8 found type `for<'r, 's> fn(&'r mut &isize, &'s mut &isize) {a::<'_, '_>}`
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0308`.