Tech

[$] Cross-crate forward declarations in Rust

Read full article at source ↗

Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 19/10/2026, 14:50:24 UTC.

Briefings

Jana Dönszelmann introduced a checked weak symbol linking feature at Kangrejos 2026 to address Rust's ad-hoc mechanisms for user code influencing standard library execution. This feature allows developers to register functions that core standard library code must call, enabling safer handling of integer overflows in Rust code. The proposal aims to provide a safer, checked analogue of C's weak symbol linking, though its implementation and impact on kernel handling remain under investigation.

Key points

• Jana Dönszelmann introduced a checked weak symbol linking feature at Kangrejos 2026 to address Rust's ad-hoc mechanisms for user code influencing standard library execution.
• The feature allows developers to register functions that core standard library code must call, enabling safer handling of integer overflows in Rust code.

Context

Rust has several ad-hoc mechanisms to allow user code to influence how the standard library executes, such as custom panic handlers and custom allocators. Jana Dönszelmann proposed using a new language feature to clean up the kernel's handling of integer overflows in Rust code.

Limitations

The evidence is limited to a single presentation at Kangrejos 2026. The specific implementation details, testing results, and long-term impact on Rust's kernel handling remain unverified and are under investigation.

Generated by Bittrees-hosted qwen35-2b sha256:aaf42c8b7c3c on 19/10/2026, 14:59:55 UTC. Based on publisher-provided feed evidence; may not cover the full original article. Check the source for details.

View archived briefing on IPFS
bafybeiembk462ku6sz6agrtvd5ncqb25f2l3anfevgxwgkfhnq56zmow54