Matthias Krüger 6ade237b6c Rollup merge of #134583 - Enselic:maybe-uninit-transmute, r=workingjubilee ... docs: `transmute<&mut T, &mut MaybeUninit<T>>` is unsound when exposed to safe code Closes #66699 On my system (Edit: And also in the [playground](https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=90529e2a9900599cb759e4bfaa5b5efe)) the example program terminates with an unpredictable exit code: ```console $ cargo +nightly build && target/debug/bin ; echo $? 255 $ cargo +nightly build && target/debug/bin ; echo $? 253 ``` And miri considers the code to have undefined behavior: ```console $ cargo +nightly miri run error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory --> src/main.rs:12:24 | 12 | std::process::exit(*code); // UB! Accessing uninitialized memory | ^^^^^ using uninitialized data, but this operation requires initialized memory | error: aborting due to 1 previous error ```		2024-12-22 21:59:24 +01:00
..
benches	Auto merge of #130733 - okaneco:is_ascii, r=scottmcm	2024-12-22 02:44:13 +00:00
src	Rollup merge of #134583 - Enselic:maybe-uninit-transmute, r=workingjubilee	2024-12-22 21:59:24 +01:00
tests	stabilize const_nonnull_new	2024-12-10 11:29:01 +01:00
Cargo.toml	Teach rust core about Xtensa VaListImpl and add a custom lowering of vaarg for xtensa.	2024-12-03 10:54:08 +00:00