39b79285be
which get mentioned in an associated type are constrained. Arguably we should just require that all regions are constrained, but that is more of a breaking change.
32 lines
893 B
Rust
32 lines
893 B
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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// Regression test for #22886.
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fn crash_please() {
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let mut iter = Newtype(Some(Box::new(0)));
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let saved = iter.next().unwrap();
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println!("{}", saved);
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iter.0 = None;
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println!("{}", saved);
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}
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struct Newtype(Option<Box<usize>>);
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impl<'a> Iterator for Newtype { //~ ERROR E0207
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type Item = &'a Box<usize>;
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fn next(&mut self) -> Option<&Box<usize>> {
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self.0.as_ref()
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}
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}
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fn main() { }
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