Kotlin 2.0.20 Released

Sarah Haggarty

The Kotlin 2.0.20 release is out! This version includes performance improvements and bug fixes for Kotlin 2.0.0, where we announced the Kotlin K2 compiler as Stable. Here are some additional highlights from this release:

• The data class copy function will have the same visibility as the constructor
• Static accessors for source sets from the default target hierarchy are now available in multiplatform projects
• Concurrent marking for Kotlin/Native has been made possible in the garbage collector
• The @ExperimentalWasmDsl annotation in Kotlin/Wasm has a new location
• Support has been added for Gradle versions 8.6–8.8
• A new option allows sharing JVM artifacts between Gradle projects as class files
• The Compose compiler has been updated
• Support for UUIDs has been added to the common Kotlin standard library

For the complete list of changes, refer to What’s new in Kotlin 2.0.20 or the release notes on GitHub.

How to install Kotlin 2.0.20

Starting from IntelliJ IDEA 2023.3 and Android Studio Iguana (2023.2.1) Canary 15, the Kotlin plugin is distributed as a bundled plugin included in your IDE. This means that you can’t install the plugin from JetBrains Marketplace anymore.

To update to the new Kotlin version, change the Kotlin version to 2.0.20 in your build scripts.

If you need the command-line compiler, download it from the GitHub release page.

If you run into any problems

• Find help on Slack (get an invite).

• Report issues to our issue tracker, YouTrack.

Special thanks to our EAP Champions 🥇👏

• Zac Sweers
• Rick Clephas
• Florian Schreiber
• Sechaba Mofokeng
• Yang
• Łukasz Wasylkowski
• David Lopez
• Bernd Prünster
• Alexander Nozik
• Benoit ‘BoD’ Lubek
• Sterling Albury
• Kacper Wojciechowski
• Mohamed Rejeb
• Jake Wharton
• Johannes Svensson
• Artyom Shendrik

What else to read and watch

• What’s new in Kotlin 2.0.20 documentation
• K2 compiler migration guide
• K2 Compiler Performance Benchmarks and How to Measure Them on Your Projects
• Meet Renovated Kotlin Support – K2 Mode: What You Need to Know
• Jetpack Compose compiler moving to the Kotlin repository
• Kotlin EAP Champions

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