e0279d7192
Previously we didn't normalize the function signatures used for closures. This didn't cause a problem in most cases, but caused an ICE in during MIR type checking. Fixes #36139
29 lines
860 B
Rust
29 lines
860 B
Rust
// Copyright 2016 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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// Previously the closure's argument would be inferred to
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// <S as ITrait<'a>>::Item, causing an error in MIR type
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// checking
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trait ITrait<'a> {type Item;}
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struct S {}
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impl<'a> ITrait<'a> for S { type Item = &'a mut usize; }
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fn m<T, I, F>(_: F)
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where I: for<'a> ITrait<'a>,
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F: for<'a> FnMut(<I as ITrait<'a>>::Item) { }
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fn main() {
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m::<usize,S,_>(|x| { *x += 1; });
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}
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