50 lines
1.4 KiB
Rust
50 lines
1.4 KiB
Rust
// Copyright 2014 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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// Test cleanup of rvalue temporary that occurs while `~` construction
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// is in progress. This scenario revealed a rather terrible bug. The
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// ingredients are:
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//
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// 1. Partial cleanup of `~` is in scope,
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// 2. cleanup of return value from `get_bar()` is in scope,
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// 3. do_it() fails.
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//
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// This led to a bug because `the top-most frame that was to be
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// cleaned (which happens to be the partial cleanup of `~`) required
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// multiple basic blocks, which led to us dropping part of the cleanup
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// from the top-most frame.
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//
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// It's unclear how likely such a bug is to recur, but it seems like a
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// scenario worth testing.
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use std::task;
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enum Conzabble {
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Bickwick(Foo)
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}
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struct Foo { field: ~uint }
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fn do_it(x: &[uint]) -> Foo {
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fail!()
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}
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fn get_bar(x: uint) -> Vec<uint> { vec!(x * 2) }
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pub fn fails() {
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let x = 2;
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let mut y = Vec::new();
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y.push(~Bickwick(do_it(get_bar(x).as_slice())));
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}
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pub fn main() {
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task::try(fails);
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}
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