00fcf79448
type-outlives works for closure types so that it ensures that all upvars outlive the region in question. This gives the same guarantees but without introducing artificial regions (and gives better error messages to boot).
21 lines
733 B
Rust
21 lines
733 B
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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#![feature(unboxed_closures)]
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// Test that an unboxed closure that captures a free variable by
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// reference cannot escape the region of that variable.
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fn main() {
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let _f = {
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let x = 0_usize;
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|| x //~ ERROR `x` does not live long enough
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};
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}
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