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| author | Pietro Albini <pietro@pietroalbini.org> | 2018-11-18 23:24:57 +0100 |
|---|---|---|
| committer | kennytm <kennytm@gmail.com> | 2018-11-19 22:06:37 +0800 |
| commit | 2a68c0075a1cf769ebc6f28667cd29fd11b852c1 (patch) | |
| tree | 5382ed6816b837c335dd00318809ad28725ca15d /src/test/incremental/thinlto | |
| parent | 05ae505a4c438b80268680747713c84ebad662f3 (diff) | |
| parent | 25d46f309130be1671d7e44d48e67b23f510bcdc (diff) | |
| download | rust-2a68c0075a1cf769ebc6f28667cd29fd11b852c1.tar.gz rust-2a68c0075a1cf769ebc6f28667cd29fd11b852c1.zip | |
Rollup merge of #56012 - RalfJung:unsafe-cell, r=nikomatsakis
avoid shared ref in UnsafeCell::get Avoid taking a shared reference in `UnsafeCell::get`. This *should* be taking a raw reference (see https://github.com/rust-lang/rfcs/pull/2582), but that operation is not currently available, so I propose we exploit `repr(transparent)` instead and cast the pointer around. This is required to make `UnsafeCell::get` pass the [stacked borrows implementation](https://www.ralfj.de/blog/2018/11/16/stacked-borrows-implementation.html) in miri (currently, `UnsafeCell::get` is on a whitelist, but that is of course not very satisfying). It shouldn't affect normal execution/codegen. Would be great if we could get this landed and shrink miri's whitelist! Cc @nikomatsakis
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