rust-lang / rust · Issue No. 160541

`core::io::RawOsError` should probably be an `i16` on AVR and MSP430

Openby tgross35opened Aug 5, 2026updated Aug 5, 20261 comments

T-libs-apiO-AVRA-ioO-msp430

Description

RawOsError is usually the side of an int, except on UEFI where it is a usize. On everything in std int was an i32, but on 16-bit AVR and MSP430, it's an i16. It probably makes sense to use i16 on those targets and add a check that we use c_int by default:

const _: () = {
    if cfg!(target_os = "uefi") {
         let _: RawOsError = 0usize;
    } else {
         let _: RawOsError = 0 as c_int;
    }
}

Tracking issue: https://github.com/rust-lang/rust/issues/154046

Relay Analysis

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