The Daily Kotlin

Kotlin 2.1.10

It seems that this release includes only bug fixes

https://github.com/JetBrains/kotlin/releases/tag/v2.1.10

GitHub

Release Kotlin 2.1.10 · JetBrains/kotlin

Changelog
Compiler

KT-73858 Compose / iOS: NullPointerException on building
KT-73454 K2: Fix type parameters mapping for typealiases with inner RHS
KT-73043 K2 Compiler does not allow references ...

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2.01K viewsRuslan Ibragimov, 12:01

The Daily Kotlin

Ktor 3.1.0 Release

Ktor has been released with multiple improvements, and even I contributed a tiny MR that adds a content type for YAML.

Blog
Github

The JetBrains Blog

Ktor 3.1.0 Release | The Kotlin Blog

Ktor 3.1.0 is here! It introduces exciting new features, performance improvements, and bug fixes.

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1.74K viewsRuslan Ibragimov, 07:51

The Daily Kotlin

OpenAI vs. DeepSeek: Which AI Understands Kotlin Better?


Generators                   Average assessment
DeepSeek-R1                  8.79
OpenAI o3-mini               8.70
OpenAI o1                    8.62
OpenAI o1-preview            8.60
OpenAI o1-mini               8.40
OpenAI GPT-4o (11.20.2024)   8.40
Anthropic Claude 3.5 Sonnet  8.38

The JetBrains Blog

OpenAI vs. DeepSeek: Which AI Understands Kotlin Better? | The Kotlin Blog

Which AI model understands Kotlin best? We tested DeepSeek-R1, several OpenAI models, and more using Kotlin-specific benchmarks. See how they compare in our analysis.

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1.92K viewsRuslan Ibragimov, edited 15:40

The Daily Kotlin

Ktor 3.1.1 bug fix release

https://github.com/ktorio/ktor/releases/tag/3.1.1

GitHub

Release 3.1.1 · ktorio/ktor

Published 24 February 2025

Improvements

Logging: messages are printed per line with OkHttp logger format (KTOR-8218)
WebSocket and SSE don't respect connection timeout set in the HttpTimeout ...

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1.8K viewsRuslan Ibragimov, 14:30

The Daily Kotlin

Kotlin 2.1.20-RC2

It seems that this release includes only bug fixes

https://github.com/JetBrains/kotlin/releases/tag/v2.1.20-RC2

GitHub

Release Kotlin 2.1.20-RC2 · JetBrains/kotlin

Changelog
Compiler

KT-75649 K2: NPE on assigning platform type value to non-nullable lateinit var
KT-75483 Native: redundant unboxing generated with smart cast
KT-75526 Regression in K2 scripting:...

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1.79K viewsRuslan Ibragimov, 15:27

The Daily Kotlin

Kotlin 2.1.20-RC3

It seems that this release includes only bug fixes

https://github.com/JetBrains/kotlin/releases/tag/v2.1.20-RC3

GitHub

Release Kotlin 2.1.20-RC3 · JetBrains/kotlin

Changelog
Compiler

KT-75578 K2: False negative [SUPER_CALL_WITH_DEFAULT_PARAMETERS] when calling the upper-class implementation of a method with the default value argument
KT-75965 The iOS app did...

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1.62K viewsRuslan Ibragimov, 15:35

The Daily Kotlin

Kotlin Roadmap updated: https://kotlinlang.org/docs/roadmap.html

Kotlin Help

Kotlin roadmap | Kotlin

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1.84K viewsRuslan Ibragimov, 09:57

The Daily Kotlin

Kotlin 2.1.20 Released

What's new

Kotlin Help

What's new in Kotlin 2.1.20 | Kotlin

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1.82K viewsRuslan Ibragimov, 13:36

The Daily Kotlin

Ktor 3.1.2 bug fix release

https://github.com/ktorio/ktor/releases/tag/3.1.2

GitHub

Release 3.1.2 · ktorio/ktor

Published 27 March 2025

Improvements

Update Kotlin to 2.1.20 (KTOR-8081)
Remove empty artifacts from publication (KTOR-8336)

Bugfixes

URL-safe base64 decoding problem (KTOR-8292)
Auth: AuthToke...

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1.46K viewsRuslan Ibragimov, 13:51

The Daily Kotlin

Amper 0.6.0

https://blog.jetbrains.com/amper/2025/04/amper-update-april-2025/

Who cares?

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1.33K viewsRuslan Ibragimov, 16:26

The Daily Kotlin

Creator of the Spring Framework: I basically had no desire to write Java, at all
https://www.youtube.com/watch?v=MQuPfZsiVx8

YouTube

What is your opinion?

Catch Rod Johnson at KotlinConf 2025 👉 https://kotlinconf.com/speakers/7d983480-a141-4710-bbf5-4b90c23c9b9b/

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1.15K viewsRuslan Ibragimov, edited 15:43

The Daily Kotlin

Fuzz testing for Kotlin

https://blog.jetbrains.com/research/2025/04/kotlinxfuzz-kotlin-fuzzing/

The JetBrains Blog

Bringing Fuzz Testing to Kotlin with kotlinx.fuzz

Identifying edge cases for testing can be a challenging task, often leaving hidden bugs and vulnerabilities undetected. Fuzz testing (fuzzing) addresses this challenge by automatically generating test

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1.11K viewsRuslan Ibragimov, 17:50

The Daily Kotlin

Update on KT-14663 by Mikhail Zarechenskiy:

https://youtrack.jetbrains.com/issue/KT-14663/Support-having-a-public-and-a-private-type-for-the-same-property#focus=Comments-27-11853379.0-0

YouTrack

Support having a "public" and a "private" type for the same property : KT-14663

Description Use case: We often store something as, say, an ArrayList, but expose it as a read-only List, or a MutableList. But internally we want to access it as an ArrayList. There are a few possible solutions to this. One is to explicitly have "public"…

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1.08K viewsRuslan Ibragimov, edited 20:23

The Daily Kotlin

In Kotlin version 2.2.0 context parameters are released as Beta 🎉

https://blog.jetbrains.com/kotlin/2025/04/update-on-context-parameters/

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The JetBrains Blog

Update on Context Parameters | The Kotlin Blog

Context parameters will be replacing context receivers in Kotlin, with version 2.2.0 featuring them as Beta. We are committed to providing an easy migration between both features, including dedicated compiler and IntelliJ IDEA support.

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1.31K viewsRuslan Ibragimov, 18:45

The Daily Kotlin

New KSP release with KSP2 enabled by default!

https://github.com/google/ksp/releases/tag/2.1.20-2.0.0

GitHub

Release 2.1.20-2.0.0 · google/ksp

What's Changed

Bumped version to 2.0.0 and enabled KSP2 by default!
No-op blockOtherCompilerPlugins #2397
A couple of fixes to compilation avoidance #2401
KSTypeReferenceResolvedImpl.toString(...

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986 viewsRuslan Ibragimov, 07:40

The Daily Kotlin

The Story Behind K2 Mode and How It Works

The JetBrains Blog

The Story Behind K2 Mode and How It Works | The IntelliJ IDEA Blog

I'm Yan Zhulanow, and I lead the Kotlin Analysis API team. Last year, we made a series of announcements about Kotlin K2 mode in IntelliJ IDEA. Now, as K2 mode is about to become the default, I am thri

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873 viewsRuslan Ibragimov, 07:23

The Daily Kotlin

Declarative Gradle EAP3 - April 2025 Update

It's Alive!

blog.gradle.org

Declarative Gradle EAP3 - April 2025 Update

Introduction

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856 viewsRuslan Ibragimov, edited 13:05

The Daily Kotlin

Kotlin 2.2.0-Beta1

🎉

🚀 Major New Features

🔹 Context-Sensitive Resolution (KT-75315, KT-75316, KT-75061)
🔹 Context Parameters (KT-74546, KT-72639, KT-75017)
🔹 K2 Compiler Enhancements
🔹 -Xjvm-default=all-compatibility is now default (KT-71768)
🔹 New Annotations: @MustUseValue, @IgnorableValue (KT-74804)
🔹 Unnamed Local Variables (KT-74809)

https://github.com/JetBrains/kotlin/releases/tag/v2.2.0-Beta1

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GitHub

Release Kotlin 2.2.0-Beta1 · JetBrains/kotlin

Changelog
Analysis API

KT-75880 K2 Mode: Typealias reference resolves to the underlying class in KMP project
KT-74246 KaVisibilityChecker.isVisible is inefficient with multiple calls on the same u...

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1.11K viewsRuslan Ibragimov, 21:30

The Daily Kotlin

Junie goes GA!

https://blog.jetbrains.com/blog/2025/04/16/jetbrains-ides-go-ai/

The JetBrains Blog

JetBrains IDEs Go AI: Coding Agent, Smarter Assistance, Free Tier | The JetBrains Blog

All JetBrains AI tools – including our improved AI Assistant and new coding agent Junie – are now available within our IDEs under a single subscription and come with a free tier.