mirror of https://github.com/rust-lang/rust
31 lines
566 B
Rust
31 lines
566 B
Rust
// Test that unsized locals uphold alignment requirements.
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// Regression test for #71416.
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//@ run-pass
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#![feature(unsized_locals)]
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#![allow(incomplete_features)]
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use std::any::Any;
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#[repr(align(256))]
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#[allow(dead_code)]
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struct A {
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v: u8
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}
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impl A {
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fn f(&self) -> *const A {
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assert_eq!(self as *const A as usize % 256, 0);
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self
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}
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}
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fn mk() -> Box<dyn Any> {
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Box::new(A { v: 4 })
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}
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fn main() {
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let x = *mk();
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let dwncst = x.downcast_ref::<A>().unwrap();
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let addr = dwncst.f();
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assert_eq!(addr as usize % 256, 0);
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}
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