src/test/ui/issues/issue-16151.rs

   1 // run-pass
   2
   3 use std::mem;
   4
   5 static mut DROP_COUNT: usize = 0;
   6
   7 struct Fragment;
   8
   9 impl Drop for Fragment {
  10     fn drop(&mut self) {
  11         unsafe {
  12             DROP_COUNT += 1;
  13         }
  14     }
  15 }
  16
  17 fn main() {
  18     {
  19         let mut fragments = vec![Fragment, Fragment, Fragment];
  20         let _new_fragments: Vec<Fragment> = mem::replace(&mut fragments, vec![])
  21             .into_iter()
  22             .skip_while(|_fragment| {
  23                 true
  24             }).collect();
  25     }
  26     unsafe {
  27         assert_eq!(DROP_COUNT, 3);
  28     }
  29 }