// http://rust-lang.org/COPYRIGHT. // // revisions: ast cmp //[cmp]compile-flags: -Z borrowck=compare #![feature(slice_patterns)] fn main() { let mut a = [1, 2, 3, 4]; let t = match a { [1, 2, ref tail..] => tail, _ => unreachable!() }; println!("t[0]: {}", t[0]); a[2] = 0; //[ast]~ ERROR cannot assign to `a[..]` because it is borrowed //[cmp]~^ ERROR cannot assign to `a[..]` because it is borrowed (Ast) //[cmp]~| ERROR cannot assign to `a[_]` because it is borrowed (Mir) println!("t[0]: {}", t[0]); t[0]; }