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require the existential bounds of an object type to be object-safe
This is required, as Copy and Sized are object-unsafe. As a soundness fix, this is a [breaking-change] Fixes #32963
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// Copyright 2016 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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use std::mem; | ||
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trait Misc {} | ||
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fn size_of_copy<T: Copy+?Sized>() -> usize { mem::size_of::<T>() } | ||
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fn main() { | ||
size_of_copy::<Misc+Copy>(); | ||
//~^ ERROR `std::marker::Copy` cannot be made into an object | ||
//~| ERROR `Misc + Copy: std::marker::Copy` is not satisfied | ||
} |
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