The Daily Kotlin

Kotlin 2.2 Livestream With the Language Evolution Team

1.38K viewsRuslan Ibragimov, 15:36

The Daily Kotlin

Modular Ktor: Building Backends for Scale

👍6

1.49K viewsRuslan Ibragimov, 13:34

The Daily Kotlin

KEEP: Named-only parameters

GitHub

Named-only parameters · Kotlin KEEP · Discussion #442

This is a discussion of the "Named-only parameters" feature. The text of the proposal can be found here. We introduce a new modifier named on function value parameters that obliges caller...

💩9👍5❤4

1.31K viewsRuslan Ibragimov, 12:16

The Daily Kotlin

Gradle 9.0 is approaching, making this an ideal time to test it:

./gradlew wrapper --gradle-version=9.0.0-rc-3 && ./gradlew wrapper

The release introduces significant new features that offer something valuable for every developer.
Notable changes include Gradle's migration to K2 (Kotlin's new compiler) and adoption of Kotlin 2.2.

https://gradle.org/whats-new/gradle-9/
https://docs.gradle.org/9.0.0-rc-3/userguide/upgrading_major_version_9.html

Gradle

Gradle by Develocity | What's new in Gradle 9.0.0

Gradle by Develocity is the open source build system for Java, Android, and Kotlin developers.

👍3❤2🤮2🔥1👏1

1.38K viewsRuslan Ibragimov, 10:09

The Daily Kotlin

Kotlin 2.2.20-Beta2

github.com/JetBrains/kotlin/releases/tag/v2.2.20-Beta2

GitHub

Release Kotlin 2.2.20-Beta2 · JetBrains/kotlin

Changelog
Analysis API. Code Compilation

KT-78382 K2 IR lowering error when interface extends interface
KT-73201 K2 IDE: Error while evaluating expressions with local classes
KT-78164 Evaluator: &...

🔥7

1.35K viewsRuslan Ibragimov, 14:02

The Daily Kotlin

Gradle 9.0 is approaching, making this an ideal time to test it: ./gradlew wrapper --gradle-version=9.0.0-rc-3 && ./gradlew wrapper The release introduces significant new features that offer something valuable for every developer. Notable changes include…

Gradle 9.0 is out

https://gradle.org/whats-new/gradle-9/
https://docs.gradle.org/current/userguide/upgrading_major_version_9.html
https://gradle.org/release-checksums/

Gradle

Gradle by Develocity | What's new in Gradle 9.0.0

Gradle by Develocity is the open source build system for Java, Android, and Kotlin developers.

1🔥6🤔6👏4🤩2

1.49K viewsRuslan Ibragimov, 16:20

The Daily Kotlin

Kotlin 2.2.10

Bugfix release

https://github.com/JetBrains/kotlin/releases/tag/v2.2.10

GitHub

Release Kotlin 2.2.10 · JetBrains/kotlin

Changelog
Compiler

KT-79276 Dexing fails with "Cannot read field X because is null" with 2.2.0
KT-79442 "Multiple annotations of type kotlin.coroutines.jvm.internal.DebugMetadata&q...

👍6

1.52K viewsRuslan Ibragimov, 09:18

The Daily Kotlin

KEEP: Rich Errors, aka Error Union Types: Motivation and Rationale

GitHub

KEEP/proposals/KEEP-0441-rich-errors-motivation.md at main · Kotlin/KEEP

Kotlin Evolution and Enhancement Process. Contribute to Kotlin/KEEP development by creating an account on GitHub.

🔥8🤔2💩2

1.48K viewsRuslan Ibragimov, 13:59

The Daily Kotlin

Kotlin Roadmap update August 25, 2025

Kotlin Help

Kotlin roadmap | Kotlin

1.1K viewsRuslan Ibragimov, 07:18

The Daily Kotlin

KEEP: Data flow-based exhaustiveness checking
(implemented in 2.2.20 under flag)

GitHub

KEEP/proposals/KEEP-0442-dfa-exhaustiveness.md at main · Kotlin/KEEP

Kotlin Evolution and Enhancement Process. Contribute to Kotlin/KEEP development by creating an account on GitHub.

🔥8

1.18K viewsRuslan Ibragimov, 13:39

The Daily Kotlin

KEEP: CoroutineContext context parameter in suspend functions

GitHub

KEEP/proposals/KEEP-0443-suspend-CoroutineContext-context-parameter.md at main · Kotlin/KEEP

Kotlin Evolution and Enhancement Process. Contribute to Kotlin/KEEP development by creating an account on GitHub.

🤔3

1.28K viewsRuslan Ibragimov, 07:12

The Daily Kotlin

KEEP: Improve compile-time constants

GitHub

KEEP/proposals/KEEP-0444-improve-compile-time-constants.md at main · Kotlin/KEEP

Kotlin Evolution and Enhancement Process. Contribute to Kotlin/KEEP development by creating an account on GitHub.

🔥7❤1👍1

1.06K viewsRuslan Ibragimov, 11:10

The Daily Kotlin

Kotlin 2.2.20-RC2

Bug fixes

https://github.com/JetBrains/kotlin/releases/tag/v2.2.20-RC2

GitHub

Release Kotlin 2.2.20-RC2 · JetBrains/kotlin

Changelog
Backend. Wasm

KT-80106 devServer in Kotlin/Wasm overwrites defaults, causing missing static paths

Compiler

KT-80285 IJ monorepo: broken compilation after 2.2.20-RC update
KT-79816 Java...

❤2👍1

1.32K viewsRuslan Ibragimov, 06:03

The Daily Kotlin

Detekt 2.0.0-alpha.0

Changelog

detekt-bkbk6n4o2-detekt.vercel.app

Changelog and Migration Guide - Detekt 2.0.0 | detekt

Detekt 2.0.0 is still in alpha. While it's stable enough to use in your projects, you can expect further breaking changes before we reach a stable release.

🎉8

1.24K viewsRuslan Ibragimov, 14:12

The Daily Kotlin

Kotlin 2.2.20 Released 🎉

https://blog.jetbrains.com/kotlin/2025/09/kotlin-2-2-20-released/
https://github.com/JetBrains/kotlin/releases/tag/v2.2.20
https://kotlinlang.org/docs/whatsnew2220.html

Please open Telegram to view this post

VIEW IN TELEGRAM

🔥2

1.14K viewsRuslan Ibragimov, 14:05

The Daily Kotlin

Design Notes: Refinement Types for Kotlin

GitHub

KEEP/notes/0006-refinement-types.md at main · Kotlin/KEEP

Kotlin Evolution and Enhancement Process. Contribute to Kotlin/KEEP development by creating an account on GitHub.

😢3❤1

1.26K viewsRuslan Ibragimov, 13:56

The Daily Kotlin

Ktor 3.3.0

https://ktor.io/changelog/3.3/
https://github.com/ktorio/ktor/releases/tag/3.3.0

❤4👍2🔥1

1.38K viewsRuslan Ibragimov, 14:07

The Daily Kotlin

Detaching GraalVM from the Java Ecosystem Train

– Graal JIT has been discontinued
– Native Image has been discontinued

This leaves Kotlin/Native as the only option for Kotlin and Java developers to build native executables

Oracle

Detaching GraalVM from the Java Ecosystem Train

GraalVM for JDK 24 was the final version of GraalVM licensed and supported as part of Oracle Java SE products. Any entitled customers seeking patches or updates to previously released GraalVM versions should download them through My Oracle Support. Customers…

😱9🤯3😢1

1.65K viewsRuslan Ibragimov, 08:05

The Daily Kotlin

JUnit 6 Released with support for suspend methods

So many quality of life improvements!

- Kotlin 2.2 baseline
- JSpecify added to Java APIs (correct nullability information for Java APIs then using from Kotlin)
- Contracts added to asserts, so we would have better smart casts in tests
- Support for Sequence in @TestFactory, @MethodSource, and @FieldSource

Release Notes
Improve Kotlin support #4548

I've created the issue about supporting suspend methods 6 years ago! And it's finally fixed 🎉

Please open Telegram to view this post

VIEW IN TELEGRAM

🎉10🔥5

1.47K viewsRuslan Ibragimov, edited 13:56

The Daily Kotlin

Kotlin 2.2.21-RC

https://github.com/JetBrains/kotlin/releases/tag/v2.2.21-RC

kotlinx.rpc 0.10.0

https://github.com/Kotlin/kotlinx-rpc/releases/tag/0.10.0

GitHub

Release Kotlin 2.2.21-RC · JetBrains/kotlin

Changelog
Backend. Wasm

KT-81372 K/Wasm: JsException: Exception was thrown while running JavaScript code on Safari 18.2/18.3
KT-80018 K/Wasm: exceptions don't work properly in JavaScriptCore (...

🔥2

1.39K viewsRuslan Ibragimov, 13:40