# Rust 1.100 stabilizes custom allocators and dependency cooldowns

_Published Thursday, November 12, 2026 at 2:07 PM EST · Products, Security · Latest · Tier 2 — Notable_

![Rust 1.100 stabilizes custom allocators and dependency cooldowns — Primary](https://www.rust-lang.org/static/images/rust-social-wide.jpg)

The Rust team released Rust 1.100.0, stabilizing custom memory allocators for Vec and Box and adding Cargo controls that delay adoption of newly published dependencies. Developers can obtain the release through rustup's stable update command.

Cargo's optional minimum publication age makes dependency resolution skip versions newer than a configured threshold, giving scanners and maintainers time to detect malicious releases. The release also permits the never type, which represents computations that produce no value, wherever a type can be named. Its changed fallback behavior can break some code in editions before 2024.

Dependency cooldowns do not apply to cargo install or versions whose registry entries lack publication timestamps.

## Sources

- [Rust Blog](https://blog.rust-lang.org/2026/11/12/Rust-1.100.0/)

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Canonical: https://techandbusiness.org/newswire/5XQ5EUh21pgErm0plsjcO8
Published: 2026-11-12T19:07:19.925Z
Story chronology: 2026-11-12T00:00:00.000Z
Retrieved: 2026-11-12T21:54:29.300Z
Publisher: Tech & Business (techandbusiness.org)