// Test mutability and slicing syntax. fn main() { let x: &[isize] = &[1, 2, 3, 4, 5]; // Immutable slices are not mutable. let y: &mut[_] = &x[2..4]; //~^ ERROR mismatched types //~| expected mutable reference `&mut [_]` //~| found reference `&[isize]` //~| types differ in mutability }