40 lines
1.0 KiB
Rust
40 lines
1.0 KiB
Rust
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// 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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// Test stack overflow triggered by evaluating the implications. To be
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// WF, the type `Receipt<Complete>` would require that `<Complete as
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// Async>::Cancel` be WF. This normalizes to `Receipt<Complete>`
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// again, leading to an infinite cycle. Issue #23003.
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#![allow(dead_code)]
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#![allow(unused_variables)]
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use std::marker::PhantomData;
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trait Async {
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type Cancel;
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}
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struct Receipt<A:Async> {
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marker: PhantomData<A>,
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}
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struct Complete {
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core: Option<()>,
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}
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impl Async for Complete {
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type Cancel = Receipt<Complete>;
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}
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fn foo(r: Receipt<Complete>) { }
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fn main() { }
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