rust-lang / rust-lang/rfcs

Forbid (or lint) shared references in statics to mutable statics.

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Description

Given:

static mut A: u8 = 0;
static B: &'static u8 = unsafe { &A };

Unless static variables are a special case, &mut A is UB (it aliases B) so the mut is moot.

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Research direction

No files, tests, or entry points are named. Start with the issue's Rust example and the RFC process to determine whether the desired outcome is a hard error or a lint, then define the affected reference patterns and how they should be validated; done requires an agreed specification before implementation.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
compilers
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
20/100

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