f2d8a00191
Higher-ranked object types can otherwise cause late-bound regions to sneak into the substs, leading to the false conclusion that some method is unreachable. The heart of this patch is from @arielb1.
27 lines
794 B
Rust
27 lines
794 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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// Regression test for issue #39292. The object vtable was being
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// incorrectly left with a null pointer.
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trait Foo<T> {
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fn print<'a>(&'a self) where T: 'a { println!("foo"); }
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}
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impl<'a> Foo<&'a ()> for () { }
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trait Bar: for<'a> Foo<&'a ()> { }
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impl Bar for () {}
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fn main() {
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(&() as &Bar).print(); // Segfault
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}
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