--- title: TinyGo 0.42 - Recover Is Real | daily.dev description: TinyGo 0.42 has shipped, closing a long-standing gap with mainline Go by making runtime panics (nil pointer dereferences, divide by zero, out-of-range... canonical: https://daily.dev/posts/tinygo-0-42---recover-is-real-n17nd7ldl twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: TinyGo 0.42 - Recover Is Real | daily.dev og:description: TinyGo 0.42 has shipped, closing a long-standing gap with mainline Go by making runtime panics (nil pointer dereferences, divide by zero, out-of-range... og:url: https://daily.dev/posts/tinygo-0-42---recover-is-real-n17nd7ldl og:image: https://api.daily.dev/og/posts/n17ND7ldL.png og:image:alt: TinyGo 0.42 - Recover Is Real 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. # TinyGo 0.42 - Recover Is Real **[Lobsters](https://daily.dev/sources/lobsters)** · 4 min read · 0 upvotes · 0 comments ## Summary TinyGo 0.42 has shipped, closing a long-standing gap with mainline Go by making runtime panics (nil pointer dereferences, divide by zero, out-of-range slice/map access, channel panics) recoverable via defer and recover, including on Windows and riscv64. The release adds Go 1.27 support, moves builds to LLVM 22 while retaining LLVM 19/20 compatibility, and introduces a minimal UEFI target letting Go programs run as pre-boot applications. ESP32 support expands with interrupts, ADC, WiFi, and Bluetooth; STM32 gains new chip and board support; USB handling improves across several boards. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### Can TinyGo recover from a nil pointer dereference or divide by zero panic now? Yes, as of TinyGo 0.42, runtime panics including nil pointer dereferences, divide by zero, out-of-range slice and map operations, and channel panics can all be recovered using defer and recover, matching standard Go behavior. This works on Windows through a new vectored exception handler and on riscv64 as well. Fatal errors like out-of-memory conditions remain unrecoverable. _Track TinyGo runtime changes like this on daily.dev before upgrading embedded Go projects._ ### Does TinyGo support Go 1.27 features like generic methods? Yes, TinyGo 0.42 adds support for Go 1.27, with release binaries built and tested against it. Generic methods, a new feature in Go 1.27, are supported through an upgraded golang.org/x/tools dependency. TinyGo also moved its own builds to LLVM 22 while keeping LLVM 19 and 20 working for distribution package builds. _Developers tracking Go version compatibility for embedded targets can follow updates like this on daily.dev._ ### Can I run a Go program as a UEFI application before the operating system boots? Yes, TinyGo 0.42 introduces a minimal UEFI target that lets a Go program be compiled and run as a UEFI application before any operating system starts. It supports UEFI time and events and uses a task scheduler by default so goroutines function. This is described as early-stage work with more development planned. _Follow emerging low-level Go capabilities like UEFI targeting on daily.dev._ ## Similar posts on daily.dev - [TinyGo Boldly Goes Where No Go Ever Did Go Before](https://daily.dev/posts/tinygo-boldly-goes-where-no-go-ever-did-go-before-w2ipciafl) · Hackaday · 34 upvotes · 1 comments --- Tags: [#golang](https://daily.dev/tags/golang), [#iot](https://daily.dev/tags/iot), [#embedded](https://daily.dev/tags/embedded) [View this post on daily.dev](https://daily.dev/posts/tinygo-0-42---recover-is-real-n17nd7ldl) ```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":"TinyGo 0.42 - Recover Is Real","url":"https://daily.dev/posts/tinygo-0-42---recover-is-real-n17nd7ldl","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/tinygo-0-42---recover-is-real-n17nd7ldl"},"datePublished":"2026-09-03T03:07:56.530Z","dateModified":"2026-09-04T08:04:28.858Z","description":"TinyGo 0.42 has shipped, closing a long-standing gap with mainline Go by making runtime panics (nil pointer dereferences, divide by zero, out-of-range...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/ba42b7901833cfa4b33047a584c8abd4?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/ba42b7901833cfa4b33047a584c8abd4?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Lobsters","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":"Lobsters","logo":"https://media.daily.dev/image/upload/s--tl8v_Fku--/f_auto,t_logo/v1698841318/logos/lobste.jpg","url":"https://daily.dev/sources/lobsters"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/tinygo-0-42---recover-is-real-n17nd7ldl","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"golang,iot,embedded","timeRequired":"PT4M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Lobsters","item":"https://daily.dev/sources/lobsters"},{"@type":"ListItem","position":3,"name":"TinyGo 0.42 - Recover Is Real"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/tinygo-0-42---recover-is-real-n17nd7ldl#faq","mainEntity":[{"@type":"Question","name":"Can TinyGo recover from a nil pointer dereference or divide by zero panic now?","acceptedAnswer":{"@type":"Answer","text":"Yes, as of TinyGo 0.42, runtime panics including nil pointer dereferences, divide by zero, out-of-range slice and map operations, and channel panics can all be recovered using defer and recover, matching standard Go behavior. 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