| //@ run-pass | |
| // FIXME(static_mut_refs): Do not allow `static_mut_refs` lint | |
| #![allow(static_mut_refs)] | |
| use std::mem; | |
| static mut DROP_COUNT: usize = 0; | |
| struct Fragment; | |
| impl Drop for Fragment { | |
| fn drop(&mut self) { | |
| unsafe { | |
| DROP_COUNT += 1; | |
| } | |
| } | |
| } | |
| fn main() { | |
| { | |
| let mut fragments = vec![Fragment, Fragment, Fragment]; | |
| let _new_fragments: Vec<Fragment> = mem::replace(&mut fragments, vec![]) | |
| .into_iter() | |
| .skip_while(|_fragment| { | |
| true | |
| }).collect(); | |
| } | |
| unsafe { | |
| assert_eq!(DROP_COUNT, 3); | |
| } | |
| } |