Don't claim LocalKey::with prevents a reference to be sent across threads
#110049
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Correct! @bors r+ rollup=always |
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May 15, 2023
…iaskrgr Rollup of 8 pull requests Successful merges: - rust-lang#108291 (Fix more benchmark test with black_box) - rust-lang#108356 (improve doc test for UnsafeCell::raw_get) - rust-lang#110049 (Don't claim `LocalKey::with` prevents a reference to be sent across threads) - rust-lang#111525 (Stop checking for the absence of something that doesn't exist) - rust-lang#111538 (Make sure the build.rustc version is either the same or 1 apart) - rust-lang#111578 (Move expansion of query macros in rustc_middle to rustc_middle::query) - rust-lang#111584 (Number lexing tweaks) - rust-lang#111587 (Custom MIR: Support `Rvalue::CopyForDeref`) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
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The documentation for
LocalKeyclaims thatwithyields a reference that cannot be sent across threads, but this is false since you can easily do that with scoped threads. What it actually prevents is the reference from outliving the current thread.