File: once-cant-call-twice-on-heap.rs

package info (click to toggle)
rustc 1.86.0%2Bdfsg1-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental, forky, sid
  • size: 913,560 kB
  • sloc: xml: 158,127; python: 35,921; javascript: 19,689; sh: 19,600; cpp: 18,906; ansic: 13,124; asm: 4,376; makefile: 708; perl: 29; lisp: 29; ruby: 19; sql: 11
file content (17 lines) | stat: -rw-r--r-- 309 bytes parent folder | download | duplicates (18) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
 
// Testing guarantees provided by once functions.
// This program would segfault if it were legal.

use std::sync::Arc;

fn foo<F:FnOnce()>(blk: F) {
    blk();
    blk(); //~ ERROR use of moved value
}

fn main() {
    let x = Arc::new(true);
    foo(move|| {
        assert!(*x);
        drop(x);
    });
}