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Rollup merge of #108630 - overlookmotel:realloc-docs-fix, r=Amanieu

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Fix docs for `alloc::realloc`

Fixes #108546.

Corrects the docs for `alloc::realloc` to bring the safety constraints into line with `Layout::from_size_align_unchecked`'s constraints.
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Matthias Krüger 2023-05-27 20:40:27 +02:00 committed by GitHub
commit 1d06bb9612
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library/core/src/alloc/global.rs
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@ -235,7 +235,8 @@ pub unsafe trait GlobalAlloc {
/// * `new_size` must be greater than zero.
///
/// * `new_size`, when rounded up to the nearest multiple of `layout.align()`,
/// must not overflow (i.e., the rounded value must be less than `usize::MAX`).
/// must not overflow isize (i.e., the rounded value must be less than or
/// equal to `isize::MAX`).
///
/// (Extension subtraits might provide more specific bounds on
/// behavior, e.g., guarantee a sentinel address or a null pointer