FuelLabs / FuelLabs/sway

RUSTSEC-2026-0247: bitmaps is unmaintained

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Description

> bitmaps is unmaintained

| Details | |
| ------------------- | ---------------------------------------------- |
| Status | unmaintained |
| Package | `bitmaps` |
| Version | `2.1.0` |
| URL | [https://github.com/bodil/bitmaps](https://github.com/bodil/bitmaps) |
| Date | 2026-05-03 |

The bitmaps crate is unmaintained; all versions are affected. The GitHub
repository was archived by the owner on 2026-05-03.

Recommended alternatives:

* [fixedbitset](https://crates.io/crates/fixedbitset)
* [bitvec](https://crates.io/crates/bitvec)

See [advisory page](https://rustsec.org/advisories/RUSTSEC-2026-0247.html) for additional details.

Contributor guide

No contributing guide indexed for this repository

Research direction

No source file or test is named. Start by locating where the bitmaps 2.1.0 dependency is declared, then compare the recommended fixedbitset and bitvec alternatives for compatibility with this Rust compiler project. Done means bitmaps is no longer used and the project's existing checks pass.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
compilers
Issue type
Refactor
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
45/100

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