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Bump kotlin_version from 2.3.20 to 2.4.0#343

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Bump kotlin_version from 2.3.20 to 2.4.0#343
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@dependabot dependabot Bot commented on behalf of github Jun 3, 2026

Bumps kotlin_version from 2.3.20 to 2.4.0.
Updates org.jetbrains.kotlin:kotlin-gradle-plugin from 2.3.20 to 2.4.0

Release notes

Sourced from org.jetbrains.kotlin:kotlin-gradle-plugin's releases.

Kotlin 2.4.0-RC2

Changelog

Backend. J2KLIB

  • KT-86367 [JKLIB] kotlin.Cloneable built-in class not found

Compose compiler

  • b/511102714 Made the default stability of non-final classes Unknown instead of Stable

Tools. Build Tools API

  • KT-86395 [BTA] forward-compatibility violation: NoSuchMethodError on JvmSnapshotBasedIncrementalCompilationConfiguration. breaks IC

Tools. Gradle

  • KT-86346 Compiler warnings printed twice in console — once as w: and again as Gradle "Problem found:" block

Tools. Gradle. BCV

  • KT-86268 ABI validation tasks fail with Unsupported platform toolchain type when using kotlin.compilerVersion pointing to an older compiler after BTA migration in 2.4.0-Beta2

Tools. Gradle. Wasm

  • KT-86457 [Wasm, Gradle] BinaryenExec.standardOutput is silently ignored after migration to Gradle Workers

Kotlin 2.4.0-RC

Changelog

Backend. J2KLIB

  • KT-84877 [J2KLIB] Remove withKotlinBuiltinsHack present in JKlibIrLinker.kt
  • KT-85846 Tests failing with fake override property missing accessors or backing field
  • KT-85717 IllegalStateException due to already bound symbol
  • KT-86204 [JKlib] Propagate private members from dependecies in the IR tree

Compiler

  • KT-86210 Update -Xannotation-default-target CLI parameter doc
  • KT-85948 Contracts in 2.4 stdlib is not compatible with 2.3 compiler
  • KT-85957 Contract on function is getting discarded if any of effect declarations is unknown
  • KT-86130 False positive UNINITIALIZED_ENUM_COMPANION on LV 2.3 and lower
  • KT-84860 False positive UNINITIALIZED_ENUM_COMPANION in enum access with explicit receiver in enum initializer when enum class has a companion
  • KT-84319 Add JVM target bytecode version 26
  • KT-85825 Context parameter lambda loses context type when wrapped in nested run blocks
  • KT-84960 Property contract leaks unsubstituted type parameter in smart cast

Compose compiler

... (truncated)

Changelog

Sourced from org.jetbrains.kotlin:kotlin-gradle-plugin's changelog.

2.3.21

Backend. Wasm

  • KT-84610 [Wasm] Failed to compile klibs in IC mode

Compiler

  • KT-84566 Prevent launching Default dispatcher threads from IJ SDK in kotlin compiler
  • KT-85358 Native: roll back the workaround for KT-84678 once MapLibre has been properly fixed
  • KT-85626 @JvmRecord in commonMain breaks compileCommonMainKotlinMetadata with "Cannot access 'java.lang.Record'"
  • KT-85405 Postpone/Revert DontIgnoreUpperBoundViolatedOnImplicitArguments
  • KT-84678 K/N: Undefined symbol from SPM-added ObjC frameworks when linking iOS target
  • KT-85021 False positive SUBCLASS_CANT_CALL_COMPANION_PROTECTED_NON_STATIC error in multi-module project

JavaScript

  • KT-82395 Support top-level declarations from compiler plugins in JS incremental compilation
  • KT-84475 K/JS: false-positive exportability warnings in multi-module project
  • KT-84633 Kotlin/JS: "Serializer for class not found" error when IR output granularity is whole-program
  • KT-85047 Kotlin/JS: @JsStatic on suspend fun of class companion generates incorrect d.ts
  • KT-84517 K/JS: bad mappings data in outputted Kotlin stdlib source map

Libraries

  • KT-71848 Kotlinx.metadata: Add CompilerPluginData into Km API

Native. C and ObjC Import

  • KT-85399 Kotlin/Native: TypeCastException when casting ObjC Protocol MetaClass with genericSafeCasts enabled
  • KT-85508 K/N: TypeCastException when using nw_parameters_create_secure_tcp block parameter on 2.3.20

Tools. Gradle

  • KT-84729 Update Gradle plugin-publish version to enable configuration cache badge on Gradle plugins portal

Tools. Gradle. Compiler plugins

  • KT-85257 AGP/Compose: MergeMappingFileTask clears R8 artifacts due to @OutputDirectory annotation on AGP 9.1+

Tools. Scripts

  • KT-85105 Scripts: JVM backend internal error (IR lowering) when scratch file contains anonymous object
  • KT-85103 Exception while generating code when explain destructuring decls
  • KT-84842 scriptCompilationClasspathFromContext behavior changed from 2.3.10 to 2.3.20
  • KT-85029 Kotlin Scripting: ScriptDiagnostic reports "at null" instead of error location

Tools. Statistics (FUS)

  • KT-85628 KGP: composite build FUS metrics fail on access of 'configurationTimeMetrics'
Commits

Updates org.jetbrains.kotlin:kotlin-stdlib-jdk8 from 2.3.20 to 2.4.0

Release notes

Sourced from org.jetbrains.kotlin:kotlin-stdlib-jdk8's releases.

Kotlin 2.4.0-RC2

Changelog

Backend. J2KLIB

  • KT-86367 [JKLIB] kotlin.Cloneable built-in class not found

Compose compiler

  • b/511102714 Made the default stability of non-final classes Unknown instead of Stable

Tools. Build Tools API

  • KT-86395 [BTA] forward-compatibility violation: NoSuchMethodError on JvmSnapshotBasedIncrementalCompilationConfiguration. breaks IC

Tools. Gradle

  • KT-86346 Compiler warnings printed twice in console — once as w: and again as Gradle "Problem found:" block

Tools. Gradle. BCV

  • KT-86268 ABI validation tasks fail with Unsupported platform toolchain type when using kotlin.compilerVersion pointing to an older compiler after BTA migration in 2.4.0-Beta2

Tools. Gradle. Wasm

  • KT-86457 [Wasm, Gradle] BinaryenExec.standardOutput is silently ignored after migration to Gradle Workers

Kotlin 2.4.0-RC

Changelog

Backend. J2KLIB

  • KT-84877 [J2KLIB] Remove withKotlinBuiltinsHack present in JKlibIrLinker.kt
  • KT-85846 Tests failing with fake override property missing accessors or backing field
  • KT-85717 IllegalStateException due to already bound symbol
  • KT-86204 [JKlib] Propagate private members from dependecies in the IR tree

Compiler

  • KT-86210 Update -Xannotation-default-target CLI parameter doc
  • KT-85948 Contracts in 2.4 stdlib is not compatible with 2.3 compiler
  • KT-85957 Contract on function is getting discarded if any of effect declarations is unknown
  • KT-86130 False positive UNINITIALIZED_ENUM_COMPANION on LV 2.3 and lower
  • KT-84860 False positive UNINITIALIZED_ENUM_COMPANION in enum access with explicit receiver in enum initializer when enum class has a companion
  • KT-84319 Add JVM target bytecode version 26
  • KT-85825 Context parameter lambda loses context type when wrapped in nested run blocks
  • KT-84960 Property contract leaks unsubstituted type parameter in smart cast

Compose compiler

... (truncated)

Changelog

Sourced from org.jetbrains.kotlin:kotlin-stdlib-jdk8's changelog.

2.3.21

Backend. Wasm

  • KT-84610 [Wasm] Failed to compile klibs in IC mode

Compiler

  • KT-84566 Prevent launching Default dispatcher threads from IJ SDK in kotlin compiler
  • KT-85358 Native: roll back the workaround for KT-84678 once MapLibre has been properly fixed
  • KT-85626 @JvmRecord in commonMain breaks compileCommonMainKotlinMetadata with "Cannot access 'java.lang.Record'"
  • KT-85405 Postpone/Revert DontIgnoreUpperBoundViolatedOnImplicitArguments
  • KT-84678 K/N: Undefined symbol from SPM-added ObjC frameworks when linking iOS target
  • KT-85021 False positive SUBCLASS_CANT_CALL_COMPANION_PROTECTED_NON_STATIC error in multi-module project

JavaScript

  • KT-82395 Support top-level declarations from compiler plugins in JS incremental compilation
  • KT-84475 K/JS: false-positive exportability warnings in multi-module project
  • KT-84633 Kotlin/JS: "Serializer for class not found" error when IR output granularity is whole-program
  • KT-85047 Kotlin/JS: @JsStatic on suspend fun of class companion generates incorrect d.ts
  • KT-84517 K/JS: bad mappings data in outputted Kotlin stdlib source map

Libraries

  • KT-71848 Kotlinx.metadata: Add CompilerPluginData into Km API

Native. C and ObjC Import

  • KT-85399 Kotlin/Native: TypeCastException when casting ObjC Protocol MetaClass with genericSafeCasts enabled
  • KT-85508 K/N: TypeCastException when using nw_parameters_create_secure_tcp block parameter on 2.3.20

Tools. Gradle

  • KT-84729 Update Gradle plugin-publish version to enable configuration cache badge on Gradle plugins portal

Tools. Gradle. Compiler plugins

  • KT-85257 AGP/Compose: MergeMappingFileTask clears R8 artifacts due to @OutputDirectory annotation on AGP 9.1+

Tools. Scripts

  • KT-85105 Scripts: JVM backend internal error (IR lowering) when scratch file contains anonymous object
  • KT-85103 Exception while generating code when explain destructuring decls
  • KT-84842 scriptCompilationClasspathFromContext behavior changed from 2.3.10 to 2.3.20
  • KT-85029 Kotlin Scripting: ScriptDiagnostic reports "at null" instead of error location

Tools. Statistics (FUS)

  • KT-85628 KGP: composite build FUS metrics fail on access of 'configurationTimeMetrics'
Commits

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@dependabot
Bump kotlin_version from 2.3.20 to 2.4.0
b4941f0 
Bumps `kotlin_version` from 2.3.20 to 2.4.0.

Updates `org.jetbrains.kotlin:kotlin-gradle-plugin` from 2.3.20 to 2.4.0
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](https://github.com/JetBrains/kotlin/commits)

Updates `org.jetbrains.kotlin:kotlin-stdlib-jdk8` from 2.3.20 to 2.4.0
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](https://github.com/JetBrains/kotlin/commits)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-gradle-plugin
  dependency-version: 2.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.jetbrains.kotlin:kotlin-stdlib-jdk8
  dependency-version: 2.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
@dependabot dependabot Bot added dependencies Pull requests that update a dependency file java Pull requests that update java code labels Jun 3, 2026
@dependabot dependabot Bot mentioned this pull request Jun 3, 2026
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