--- title: Looking back at real crashes, when did a SwiftUI List... description: List data must mutate on the main thread or diffs can crash later. Book a mentoring session → https://rebeloper.com/mentoring #rebeloper #MainActor... canonical: https://daily.dev/posts/looking-back-at-real-crashes-when-did-a-swiftui-list-start-breaking-after-a-background-update--evxqsdkrj twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Looking back at real crashes, when did a SwiftUI List start breaking after a background update? | daily.dev og:description: List data must mutate on the main thread or diffs can crash later. Book a mentoring session → https://rebeloper.com/mentoring #rebeloper #MainActor... og:url: https://daily.dev/posts/looking-back-at-real-crashes-when-did-a-swiftui-list-start-breaking-after-a-background-update--evxqsdkrj og:image: https://api.daily.dev/og/posts/eVXQsdKRJ.png og:image:alt: Looking back at real crashes, when did a SwiftUI List start breaking after a background update? 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. # Looking back at real crashes, when did a SwiftUI List start breaking after a background update? **[Rebeloper](https://daily.dev/sources/rebeloper)** · 1 min read · 0 upvotes · 0 comments ## Summary List data must mutate on the main thread or diffs can crash later. Book a mentoring session → https://rebeloper.com/mentoring #rebeloper #MainActor #BackgroundUpdate #ListDiff #SwiftUIList ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 1 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments - [CNCF Unveils Schedule for KubeCon \+ CloudNativeCon Europe 2026](https://daily.dev/posts/cncf-unveils-schedule-for-kubecon-cloudnativecon-europe-2026-ikhcoa5cb) · CNCF · 2 upvotes · 0 comments - [CNCF Debuts KubeCon \+ CloudNativeCon Japan 2026 Schedule](https://daily.dev/posts/cncf-debuts-kubecon-cloudnativecon-japan-2026-schedule-xp5pyudub) · CNCF · 1 upvotes · 0 comments --- [View this post on daily.dev](https://daily.dev/posts/looking-back-at-real-crashes-when-did-a-swiftui-list-start-breaking-after-a-background-update--evxqsdkrj) ```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":"Looking back at real crashes, when did a SwiftUI List start breaking after a background update?","url":"https://daily.dev/posts/looking-back-at-real-crashes-when-did-a-swiftui-list-start-breaking-after-a-background-update--evxqsdkrj","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/looking-back-at-real-crashes-when-did-a-swiftui-list-start-breaking-after-a-background-update--evxqsdkrj"},"datePublished":"2026-02-01T18:57:38.718Z","dateModified":"2026-02-01T20:44:49.166Z","description":"List data must mutate on the main thread or diffs can crash later.\n\nBook a mentoring session → https://rebeloper.com/mentoring\n\n#rebeloper #MainActor...","image":"https://i.ytimg.com/vi/ThNfbGCrWPE/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/ThNfbGCrWPE/sddefault.jpg","isAccessibleForFree":true,"articleSection":"Rebeloper","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":"Rebeloper","logo":"https://media.daily.dev/image/upload/s--W0sZL8K4--/f_auto/v1726990075/logos/rebeloper","url":"https://daily.dev/sources/rebeloper"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/looking-back-at-real-crashes-when-did-a-swiftui-list-start-breaking-after-a-background-update--evxqsdkrj","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"","timeRequired":"PT1M","video":{"@type":"VideoObject","name":"Looking back at real crashes, when did a SwiftUI List start breaking after a background update?","description":"List data must mutate on the main thread or diffs can crash later.\n\nBook a mentoring session → https://rebeloper.com/mentoring\n\n#rebeloper #MainActor...","thumbnailUrl":"https://i.ytimg.com/vi/ThNfbGCrWPE/sddefault.jpg","uploadDate":"2026-02-01T18:57:38.718Z","duration":"PT1M","url":"https://api.daily.dev/r/eVXQsdKRJ","embedUrl":"https://www.youtube.com/embed/ThNfbGCrWPE"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Rebeloper","item":"https://daily.dev/sources/rebeloper"},{"@type":"ListItem","position":3,"name":"Looking back at real crashes, when did a SwiftUI List start breaking after a background update?"}]} ```