| // Issue 27282: This is a variation on issue-27282-move-ref-mut-into-guard.rs |
| // |
| // It reborrows instead of moving the `ref mut` pattern borrow. This |
| // means that our conservative check for mutation in guards will |
| // reject it. But I want to make sure that we continue to reject it |
| // (under NLL) even when that conservaive check goes away. |
| |
| fn main() { |
| let mut b = &mut true; |
| match b { |
| &mut false => {}, |
| ref mut r if { (|| { let bar = &mut *r; **bar = false; })(); |
| //~^ ERROR cannot borrow `r` as mutable, as it is immutable for the pattern guard |
| false } => { &mut *r; }, |
| &mut true => { println!("You might think we should get here"); }, |
| _ => panic!("surely we could never get here, since rustc warns it is unreachable."), |
| } |
| } |
