37 lines
1.1 KiB
Rust
37 lines
1.1 KiB
Rust
// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// ignore-pretty issue #37201
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// Check that when a `let`-binding occurs in a loop, its associated
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// drop-flag is reinitialized (to indicate "needs-drop" at the end of
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// the owning variable's scope).
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struct A<'a>(&'a mut i32);
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impl<'a> Drop for A<'a> {
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fn drop(&mut self) {
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*self.0 += 1;
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}
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}
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fn main() {
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let mut cnt = 0;
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for i in 0..2 {
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let a = A(&mut cnt);
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if i == 1 { // Note that
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break; // both this break
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} // and also
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drop(a); // this move of `a`
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// are necessary to expose the bug
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}
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assert_eq!(cnt, 2);
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}
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