Landing: 3b972ec2fbdf

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Project / Subsystem

gcc / gccrs

Date

2026-06-27

Author

Lucas Ly Ba

Commit

3b972ec2fbdf049c561be3875cfda596cecc74dc

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: gccrs
patch_id: —
commit_hash: 3b972ec2fbdf049c561be3875cfda596cecc74dc
source_type: github
headline: GCC Rust frontend adds lint for mutable static references
tldr: GCC's Rust frontend now warns about taking references to mutable statics to prevent undefined behavior.
author: Lucas Ly Ba
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • gccrs
• rust
• lint
• safety
• undefined behavior
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/3b972ec2fbdf049c561be3875cfda596cecc74dc
date: 2026-06-27T00:00:00.000Z

A new lint has been added to GCC’s Rust frontend to warn against taking references to mutable static variables. This practice can easily lead to undefined behavior, and the new lint aims to improve code safety by discouraging it.