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Check that predicates hold before emitting an entry for the vtable.
Fixes #23435.
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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT | ||
// file at the top-level directory of this distribution and at | ||
// http://rust-lang.org/COPYRIGHT. | ||
// | ||
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | ||
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | ||
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | ||
// option. This file may not be copied, modified, or distributed | ||
// except according to those terms. | ||
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// Test that we do not ICE when a default method implementation has | ||
// requirements (in this case, `Self : Baz`) that do not hold for some | ||
// specific impl (in this case, `Foo : Bar`). This causes problems | ||
// only when building a vtable, because that goes along and | ||
// instantiates all the methods, even those that could not otherwise | ||
// be called. | ||
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struct Foo { | ||
x: i32 | ||
} | ||
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trait Bar { | ||
fn bar(&self) where Self : Baz { self.baz(); } | ||
} | ||
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trait Baz { | ||
fn baz(&self); | ||
} | ||
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impl Bar for Foo { | ||
} | ||
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fn main() { | ||
let x: &Bar = &Foo { x: 22 }; | ||
} |