Back out #62150 (Implement mem::{zeroed,uninitialized} in terms of MaybeUninit)#63343
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Back out #62150 (Implement mem::{zeroed,uninitialized} in terms of MaybeUninit)#63343bors merged 1 commit intorust-lang:masterfrom
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Revert "uninit intrinsic is gone" This reverts commit fa290f1. Uninit is [being reinstated](rust-lang/rust#63343) because it breaks some broken code.
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r? @RalfJung |
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I went with an amend, so technically this is no longer a revert. Is that fine? |
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Out of time today, will fix it later. |
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Looking good, thanks a lot! Let's get this into the beta. @bors r+ p=1 |
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📌 Commit 2358e3e has been approved by |
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☀️ Test successful - checks-azure |
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implement zeroed and uninitialized with MaybeUninit This is the second attempt of doing such a change (first PR: rust-lang#62150). The last change [got reverted](rust-lang#63343) because it [caused](rust-lang#62825) some [issues](rust-lang#52898 (comment)) in [code that incorrectly used these functions](AltF02/x11-rs#99). Since then, the [problematic code has been fixed](AltF02/x11-rs#101), and rustc [gained a lint](rust-lang#63346) that is able to detect many misuses of these functions statically and a [dynamic check that panics](rust-lang#66059) instead of causing UB for some incorrect uses. Fixes rust-lang#62825
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implement zeroed and uninitialized with MaybeUninit This is the second attempt of doing such a change (first PR: rust-lang#62150). The last change [got reverted](rust-lang#63343) because it [caused](rust-lang#62825) some [issues](rust-lang#52898 (comment)) in [code that incorrectly used these functions](AltF02/x11-rs#99). Since then, the [problematic code has been fixed](AltF02/x11-rs#101), and rustc [gained a lint](rust-lang#63346) that is able to detect many misuses of these functions statically and a [dynamic check that panics](rust-lang#66059) instead of causing UB for some incorrect uses. Fixes rust-lang#62825
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implement zeroed and uninitialized with MaybeUninit This is the second attempt of doing such a change (first PR: rust-lang#62150). The last change [got reverted](rust-lang#63343) because it [caused](rust-lang#62825) some [issues](rust-lang#52898 (comment)) in [code that incorrectly used these functions](AltF02/x11-rs#99). Since then, the [problematic code has been fixed](AltF02/x11-rs#101), and rustc [gained a lint](rust-lang#63346) that is able to detect many misuses of these functions statically and a [dynamic check that panics](rust-lang#66059) instead of causing UB for some incorrect uses. Fixes rust-lang#62825
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Ref: #62825
cc @RalfJung