From: kennytm <kennytm@gmail.com>
Date: Fri, 20 Jul 2018 18:59:04 +0000 (+0800)
Subject: Rollup merge of #52502 - RalfJung:rotate, r=scottmcm
X-Git-Url: https://git.lizzy.rs/?a=commitdiff_plain;h=c74ff6cbd45ee79d623a6e1ad936d851c34fffc8;p=rust.git

Rollup merge of #52502 - RalfJung:rotate, r=scottmcm

fix unsafety: don't call ptr_rotate for ZST

`rotate::ptr_rotate` has a comment saying
```
/// # Safety
///
/// The specified range must be valid for reading and writing.
/// The type `T` must have non-zero size.
```
So we better make sure we don't call it on ZST...

Cc @scottmcm (author of https://github.com/rust-lang/rust/pull/41670)
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