Landing: 5f8db9c25f05

← All landings

Project / Subsystem

gcc / gccrs

Date

2026-07-06

Author

Yap Zhi Heng

Commit

5f8db9c25f054be5107d4adf679669d1d3cd5c19

Source

github

Perf win

Breaking

View on GitHub →

All attributes

project: gcc
subsystem: gccrs
patch_id: —
commit_hash: 5f8db9c25f054be5107d4adf679669d1d3cd5c19
source_type: github
headline: gccrs: Add new checks for `#[repr(align)]` attribute
tldr: Enforces that the alignment parameter in `#[repr(align)]` is a power of two.
author: Yap Zhi Heng
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • gccrs
• rust
• attribute
• type system
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/5f8db9c25f054be5107d4adf679669d1d3cd5c19
date: 2026-07-06T00:00:00.000Z

The Rust compiler frontend now includes checks for the #[repr(align)] attribute to ensure that the specified alignment value is a power of two. This is a requirement for valid alignment specifications in Rust, preventing potential misinterpretations or undefined behavior related to memory alignment.