87a11812e1
The evaluation cache already exists, and it can handle differing parameter environments natively. Fixes #39970. Fixes #42796.
31 lines
856 B
Rust
31 lines
856 B
Rust
// Copyright 2017 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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trait Array<'a> {
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type Element: 'a;
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}
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trait Visit {
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fn visit() {}
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}
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impl<'a> Array<'a> for () {
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type Element = &'a ();
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}
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impl Visit for () where
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//(): for<'a> Array<'a, Element=&'a ()>, // No ICE
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(): for<'a> Array<'a, Element=()>, // ICE
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{}
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fn main() {
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<() as Visit>::visit();
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//~^ ERROR type mismatch resolving `for<'a> <() as Array<'a>>::Element == ()`
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}
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