0d5bcb14ad
Many of the modifications putting in `Box::new` calls also include a pointer to Issue 22405, which tracks going back to `box <expr>` if possible in the future. (Still tried to use `Box<_>` where it sufficed; thus some tests still have `box_syntax` enabled, as they use a mix of `box` and `Box::new`.) Precursor for overloaded-`box` and placement-`in`; see Issue 22181.
28 lines
922 B
Rust
28 lines
922 B
Rust
// Copyright 2012 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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//buggy.rs
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#![feature(box_syntax)]
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extern crate collections;
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use std::collections::HashMap;
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fn main() {
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let tmp: Box<_>;
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let mut buggy_map: HashMap<usize, &usize> = HashMap::new();
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// FIXME (#22405): Replace `Box::new` with `box` here when/if possible.
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buggy_map.insert(42, &*Box::new(1)); //~ ERROR borrowed value does not live long enough
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// but it is ok if we use a temporary
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tmp = box 2;
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buggy_map.insert(43, &*tmp);
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}
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