src/test/ui/issues/issue-47646.rs

   1 #![allow(warnings)]
   2 #![feature(nll)]
   3
   4 use std::collections::BinaryHeap;
   5
   6 fn main() {
   7     let mut heap: BinaryHeap<i32> = BinaryHeap::new();
   8     let borrow = heap.peek_mut();
   9
  10     match (borrow, ()) {
  11         (Some(_), ()) => {
  12             println!("{:?}", heap); //~ ERROR cannot borrow `heap` as immutable
  13         }
  14         _ => {}
  15     };
  16 }