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Auto merge of #84053 - RalfJung:liballoc-miri, r=Manishearth

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fix incorrect Box::from_raw_in doctest

Now that Miri can run doctests, I ran it on liballoc, and found exactly one problem: this test creates a `Box<u8>` to deallocate a 4-byte allocation!

Introduced by https://github.com/rust-lang/rust/pull/80310 so r? `@Manishearth` `@kennytm`
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bors 2021-04-11 00:27:23 +00:00
commit ef38b45e8b
1 changed files with 1 additions and 1 deletions
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library/alloc/src/boxed.rs
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@ -793,7 +793,7 @@ impl<T: ?Sized, A: Allocator> Box<T, A> {
/// use std::alloc::{Allocator, Layout, System};
///
/// unsafe {
/// let ptr = System.allocate(Layout::new::<i32>())?.as_mut_ptr();
/// let ptr = System.allocate(Layout::new::<i32>())?.as_mut_ptr() as *mut i32;
/// // In general .write is required to avoid attempting to destruct
/// // the (uninitialized) previous contents of `ptr`, though for this
/// // simple example `*ptr = 5` would have worked as well.