--- title: Announcing Rust 1.98.1 | daily.dev description: Rust 1.98.1 is a point release that fixes a miscompilation bug in vtable generation present in Rust 1.98.0, where rustc could incorrectly generate a trait... canonical: https://daily.dev/posts/announcing-rust-1-98-1-zrger4jea twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Announcing Rust 1.98.1 | daily.dev og:description: Rust 1.98.1 is a point release that fixes a miscompilation bug in vtable generation present in Rust 1.98.0, where rustc could incorrectly generate a trait... og:url: https://daily.dev/posts/announcing-rust-1-98-1-zrger4jea og:image: https://api.daily.dev/og/posts/zrgER4jEA.png og:image:alt: Announcing Rust 1.98.1 og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Announcing Rust 1.98.1 **[Rust](https://daily.dev/sources/rust)** · 2 min read · 7 upvotes · 0 comments ## Summary Rust 1.98.1 is a point release that fixes a miscompilation bug in vtable generation present in Rust 1.98.0, where rustc could incorrectly generate a trait object vtable containing a null pointer instead of a function pointer, causing undefined behavior such as segfaults or arbitrary effects. Users can update via 'rustup update stable'. The team also encourages testers to run beta and nightly channels and report bugs. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What bug does Rust 1.98.1 fix? Rust 1.98.1 fixes a miscompilation in vtable generation that was present in Rust 1.98.0. In certain circumstances, rustc incorrectly generated a trait object vtable with a null pointer where a function pointer should have been, leading to undefined behavior in the emitted code, including segfaults or other arbitrary effects typical of UB. _Developers tracking compiler correctness issues can follow Rust release notes like this on daily.dev._ ### How do I update to Rust 1.98.1 using rustup? Run 'rustup update stable' to get Rust 1.98.1 if rustup is already installed. If rustup is not installed, it can be obtained from the Rust website's install page. The team also invites users to test future changes early by running 'rustup default beta' or 'rustup default nightly' and reporting bugs. _Rust developers keeping toolchains current follow update guidance like this on daily.dev._ ## Similar posts on daily.dev - [Announcing Rust 1.93.1](https://daily.dev/posts/announcing-rust-1-93-1-t3t70zisf) · Rust · 33 upvotes · 0 comments - [Announcing Rust 1.97.0](https://daily.dev/posts/announcing-rust-1-97-0-fqxhq3pfj) · Rust · 22 upvotes · 0 comments --- Tags: [#rust](https://daily.dev/tags/rust), [#compiler](https://daily.dev/tags/compiler) [View this post on daily.dev](https://daily.dev/posts/announcing-rust-1-98-1-zrger4jea) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Announcing Rust 1.98.1","url":"https://daily.dev/posts/announcing-rust-1-98-1-zrger4jea","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/announcing-rust-1-98-1-zrger4jea"},"datePublished":"2026-09-03T13:22:32.657Z","dateModified":"2026-09-04T04:26:51.347Z","description":"Rust 1.98.1 is a point release that fixes a miscompilation bug in vtable generation present in Rust 1.98.0, where rustc could incorrectly generate a trait...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/10c030b2429f801a5aed8756bdece9d2?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/10c030b2429f801a5aed8756bdece9d2?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Rust","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Rust","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/8fb725c4025846578f65c8eada2fc5b8","url":"https://daily.dev/sources/rust"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/announcing-rust-1-98-1-zrger4jea","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":7},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"rust,compiler","timeRequired":"PT2M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Rust","item":"https://daily.dev/sources/rust"},{"@type":"ListItem","position":3,"name":"Announcing Rust 1.98.1"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/announcing-rust-1-98-1-zrger4jea#faq","mainEntity":[{"@type":"Question","name":"What bug does Rust 1.98.1 fix?","acceptedAnswer":{"@type":"Answer","text":"Rust 1.98.1 fixes a miscompilation in vtable generation that was present in Rust 1.98.0. In certain circumstances, rustc incorrectly generated a trait object vtable with a null pointer where a function pointer should have been, leading to undefined behavior in the emitted code, including segfaults or other arbitrary effects typical of UB. Developers tracking compiler correctness issues can follow Rust release notes like this on daily.dev."}},{"@type":"Question","name":"How do I update to Rust 1.98.1 using rustup?","acceptedAnswer":{"@type":"Answer","text":"Run 'rustup update stable' to get Rust 1.98.1 if rustup is already installed. If rustup is not installed, it can be obtained from the Rust website's install page. The team also invites users to test future changes early by running 'rustup default beta' or 'rustup default nightly' and reporting bugs. Rust developers keeping toolchains current follow update guidance like this on daily.dev."}}]} ```