diff --git a/src/test/run-pass/issue-27401-dropflag-reinit.rs b/src/test/run-pass/issue-27401-dropflag-reinit.rs new file mode 100644 index 000000000000..99d5e5cd536d --- /dev/null +++ b/src/test/run-pass/issue-27401-dropflag-reinit.rs @@ -0,0 +1,34 @@ +// Copyright 2015 The Rust Project Developers. See the COPYRIGHT +// file at the top-level directory of this distribution and at +// http://rust-lang.org/COPYRIGHT. +// +// Licensed under the Apache License, Version 2.0 or the MIT license +// , at your +// option. This file may not be copied, modified, or distributed +// except according to those terms. + +// Check that when a `let`-binding occurs in a loop, its associated +// drop-flag is reinitialized (to indicate "needs-drop" at the end of +// the owning variable's scope). + +struct A<'a>(&'a mut i32); + +impl<'a> Drop for A<'a> { + fn drop(&mut self) { + *self.0 += 1; + } +} + +fn main() { + let mut cnt = 0; + for i in 0..2 { + let a = A(&mut cnt); + if i == 1 { // Note that + break; // both this break + } // and also + drop(a); // this move of `a` + // are necessary to expose the bug + } + assert_eq!(cnt, 2); +}