32 lines
652 B
Rust
32 lines
652 B
Rust
// run-fail
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// error-pattern:drop 1
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// error-pattern:drop 2
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// ignore-emscripten no processes
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/// Structure which will not allow to be dropped twice.
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struct Droppable<'a>(&'a mut bool, u32);
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impl<'a> Drop for Droppable<'a> {
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fn drop(&mut self) {
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if *self.0 {
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eprintln!("{} dropped twice", self.1);
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::std::process::exit(1);
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}
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eprintln!("drop {}", self.1);
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*self.0 = true;
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}
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}
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fn mir() {
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let (mut xv, mut yv) = (false, false);
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let x = Droppable(&mut xv, 1);
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let y = Droppable(&mut yv, 2);
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let mut z = x;
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let k = y;
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z = k;
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}
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fn main() {
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mir();
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panic!();
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}
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