What's worse, MSVC's 32-bit x86 ABI reports an 8-byte alignment requirement (via __alignof) for 64-bit integer types, and its struct layout algorithm uses that

What's worse, MSVC's 32-bit x86 ABI reports an 8-byte alignment requirement (via __alignof) for 64-bit integer types, and its struct layout algorithm uses that alignment to determine padding, but those integers and structs are only aligned to 4 bytes when allocated on the stack! This has caused issues with Rust code trying to link with MSVC code [0], since Rust's standard library documentation asserts that properly aligned pointers have addresses that are always a multiple of the alignment used for struct layout. [0] https://github.com/rust-lang/rust/issues/112480 https://github.com/rust-lang/rust/issues/112480