Upgrade to Rust 1.90

Vectornaut commented

2025-10-08 20:44:47 +00:00

Member

This is the current stable version. The Rust team plans to stabilize 1.91 on Oct. 30, 2025.

This is the current stable version. The Rust team plans to stabilize [1.91](https://releases.rs/docs/1.91.0/) on Oct. 30, 2025.

Vectornaut added the

maintenance

label 2025-10-08 20:44:47 +00:00

glen commented

2025-10-08 20:47:36 +00:00

Owner

Is there a motivation for continuously tracking stable Rust? Or should we just wait for Oct 30? Is there a way to automate Rust-bump PRs and if so, would we want to do that?

Vectornaut commented

2025-11-18 06:59:03 +00:00

Author

Member

The cost of being a few releases behind shouldn't be too high, but we do benefit from new Rust features. For example, pull request #84 bumped the Rust version from 1.85 to 1.86 so we could use a newly stabilized trait object upcasting feature. We also have a very minor simplification waiting on the future stabilization of an experimental feature.

Because I like to keep pull requests focused, doing periodic dedicated Rust upgrade PRs seems like less work to me than combining a new feature and a Rust upgrade in the same PR.

The cost of being a few releases behind shouldn't be too high, but we do benefit from new Rust features. For example, pull request #84 bumped the Rust version from 1.85 to 1.86 so we could use a newly stabilized trait object upcasting feature. We also have a [very minor simplification](https://code.studioinfinity.org/StudioInfinity/dyna3/src/commit/6c3a48fb52a02f33ff2823b69357d2d5f44efe94/app-proto/src/components/test_assembly_chooser.rs#L437) waiting on the future stabilization of an experimental feature. Because I like to keep pull requests focused, doing periodic dedicated Rust upgrade PRs seems like less work to me than combining a new feature and a Rust upgrade in the same PR.

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Upgrade to Rust 1.90 #124