Rustup 1.28.1 has been released, providing users with the capability to install Rust, a programming language designed for developing reliable and efficient software. The release resolves issues associated with version 1.28.0, which affected users who had previously updated.

The latest version incorporates enhancements for automatic installation, displays the active toolchain, addresses the reqwest backend issue, supports relative symlinks for proxies, and includes other improvements. Users have the ability to update by terminating programs with Rustup and executing the command $ rustup self update. There may be potential issues with anti-malware scanners obstructing Rustup or hindering its ability to create or copy files. Rustup will cease self-updating in CI environments, and these concerns are expected to be addressed within a few weeks as anti-malware scanners are updated to recognize the new release.

Announcing rustup 1.28.1

The rustup team is happy to announce the release of rustup version 1.28.1.  Rustup is the recommended tool to install  Rust, a programming language that is empowering everyone to build reliable and efficient software.

Challenges with rustup 1.28.0

rustup 1.28.0 was a significant release with many changes, and there was a quick response from many folks that this release broke their processes. While we considered yanking the release, we worried that this would cause problems for people who had already updated to adopt some of the changes. Instead, we are rolling forward with 1.28.1 today and potentially further bugfix releases to address the feedback that comes in.

We value all constructive feedback -- please keep it coming in the  issue tracker. In particular, the change with regard to implicit toolchain installation is being discussed in  this issue.

What's new in rustup 1.28.1

This release contains the following fixes:

• Automatic install is enabled by default but can be opted out by setting RUSTUP_AUTO_INSTALL environment variable to 0.  pr#4214  pr#4227
• rustup show active-toolchain will only print a single line, as it did in 1.27.  pr#4221
• Fixed a bug in the reqwest backend that would erroneously timeout downloads after 30s.  pr#4218
• Use relative symlinks for proxies.  pr#4226

How to update

If you have a previous version of rustup installed, getting rustup 1.28.1 is as easy as stopping any programs which may be using Rustup (e.g. closing your IDE) and running:

$ rustup self update

Rustup will also automatically update itself at the end of a normal toolchain update:

$ rustup update

If you don't have it already, you can  get rustup from the appropriate page on our website.

Rustup's documentation is also available in  the rustup book.

Caveats

Rustup releases can come with problems not caused by rustup itself but just due to having a new release. As such, we recommend paying attention to the following potential issues in particular:

• Anti-malware scanners might be blocking rustup or stopping it from creating or copying files (especially when installing rust-docs, since it contains many small files).

• In your CI environment, rustup might fail when trying to perform a self-update.

  This is a  known issue, and in the case where this issue does occur, we recommend applying the following workaround at the beginning of your workflow:

  $ rustup set auto-self-update disable
  

  Also, starting from 1.28.0, rustup will no longer attempt to self-update in CI environments, so this workaround should not be necessary in the future.

These issues should be automatically resolved in a few weeks when the anti-malware scanners are updated to be aware of the new rustup release, and the hosted version is updated across all CI runners.

Thanks

Thanks to the rustup and t-release team members who came together to quickly address these issues.

Announcing rustup 1.28.1 | Rust Blog