# Rust 1.98.0 pre-release testing

**URL:** <https://internals.rust-lang.org/t/rust-1-98-0-pre-release-testing/24541>\
**Category:** announcements\
**Created:** [August 19, 2026, 1:34am UTC](https://internals.rust-lang.org/t/rust-1-98-0-pre-release-testing/24541 "2026-08-19T01:34:33Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![system](https://sea2.discourse-cdn.com/flex002/user_avatar/internals.rust-lang.org/system/32/14092_2.png) [@system](https://internals.rust-lang.org/u/system)\
**Post date:** [August 19, 2026, 1:34am UTC](https://internals.rust-lang.org/t/rust-1-98-0-pre-release-testing/24541/1 "2026-08-19T01:34:33Z")

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The 1.98.0 pre-release is ready for testing. The release is scheduled for August 20. [Release notes can be found here.](https://dev-doc.rust-lang.org/1.98.0/releases.html)

You can try it out locally by running:

```rust
RUSTUP_DIST_SERVER=https://dev-static.rust-lang.org rustup update stable

```

The index is [https://dev-static.rust-lang.org/dist/2026-08-18/index.html](https://dev-static.rust-lang.org/dist/2026-08-18/index.html).

General feedback about our pre-release process is welcome [on this GitHub issue](https://github.com/rust-lang/release-team/issues/16).

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**Author:** ![ais523](https://avatars.discourse-cdn.com/v4/letter/a/a183cd/32.png) [@ais523](https://internals.rust-lang.org/u/ais523)\
**Post date:** [August 19, 2026, 1:52am UTC](https://internals.rust-lang.org/t/rust-1-98-0-pre-release-testing/24541/2 "2026-08-19T01:52:33Z")

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~~One error in the release notes: they claim to have stabilised `Send` and `Sync` for `std::process::CommandArgs`, but I think actually the opposite occurred (negative impls `!Send` and `!Sync` were stabilised on the type).~~ EDIT: this was wrong, the outdated links to stable catch me out sometimes and I may have muddled it with a different commit that isn't part of the stable release and affects a different type.

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**Author:** ![chrefr](https://avatars.discourse-cdn.com/v4/letter/c/e480ec/32.png) [@chrefr](https://internals.rust-lang.org/u/chrefr)\
**Post date:** [August 19, 2026, 2:20am UTC](https://internals.rust-lang.org/t/rust-1-98-0-pre-release-testing/24541/3 "2026-08-19T02:20:11Z")

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No, it just links to the docs of stable instead of beta.