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rust@octodon.social ("Rust tips") wrote:
#Rustlang 1.67 added extra optimizations of struct layouts. This might break code that relied on the "don't rely on this" layout of Rust structs without `#[repr(C)]`.
If you want to ensure your code doesn't rely on undocumented struct layout, there's an nightly flag for that: https://github.com/rust-lang/rust/issues/106764
RUSTFLAGS="-Z randomize-layout" cargo +nightly test