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chore(deps): bump kotlin from 2.3.20 to 2.3.21#403

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chore(deps): bump kotlin from 2.3.20 to 2.3.21#403
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@dependabot dependabot Bot commented on behalf of github Apr 24, 2026 •
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Bumps kotlin from 2.3.20 to 2.3.21.
Updates org.jetbrains.kotlin.jvm from 2.3.20 to 2.3.21

Release notes

Sourced from org.jetbrains.kotlin.jvm's releases.

Kotlin 2.3.21

Changelog

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)

... (truncated)

Changelog

Sourced from org.jetbrains.kotlin.jvm'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
  • fea1ad8 Add ChangeLog for 2.3.21-RC2
  • 09c341e disable swift export execution tests in order to update macos
  • 67a0868 Avoid accessing KotlinNativeLink taskProvider when task was not executed
  • f89e5db [K/N] Disable TSAN in runtime tests
  • 45d6c85 [K/N] Don't generate generic safe casts for Objective-C types
  • 9261a6f [K/N][tests] Add a reproducer for KT-85508
  • c9ab9db [K/N][tests] Add a reproducer for KT-85399
  • 502e844 Explain: fix for destructuring declarations
  • 0c26485 Explain: fix for object literals
  • 68a9e3f [minor] fix testdata name in explain test
  • Additional commits viewable in compare view

Updates org.jetbrains.kotlin.plugin.serialization from 2.3.20 to 2.3.21

Release notes

Sourced from org.jetbrains.kotlin.plugin.serialization's releases.

Kotlin 2.3.21

Changelog

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)

... (truncated)

Changelog

Sourced from org.jetbrains.kotlin.plugin.serialization'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
  • fea1ad8 Add ChangeLog for 2.3.21-RC2
  • 09c341e disable swift export execution tests in order to update macos
  • 67a0868 Avoid accessing KotlinNativeLink taskProvider when task was not executed
  • f89e5db [K/N] Disable TSAN in runtime tests
  • 45d6c85 [K/N] Don't generate generic safe casts for Objective-C types
  • 9261a6f [K/N][tests] Add a reproducer for KT-85508
  • c9ab9db [K/N][tests] Add a reproducer for KT-85399
  • 502e844 Explain: fix for destructuring declarations
  • 0c26485 Explain: fix for object literals
  • 68a9e3f [minor] fix testdata name in explain test
  • Additional commits viewable in compare view

@dependabot dependabot Bot added dependencies Pull requests that update a dependency file java Pull requests that update java code labels Apr 24, 2026
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github-actions Bot commented Apr 24, 2026 •
edited
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Test Results

27 tests  ±0   27 ✅ ±0   1m 41s ⏱️ +12s
 7 suites ±0    0 💤 ±0 
 7 files   ±0    0 ❌ ±0 

Results for commit e8660aa. ± Comparison against base commit 3a2cc8f.

♻️ This comment has been updated with latest results.

@dependabot
chore(deps): bump kotlin from 2.3.20 to 2.3.21
e8660aa 
Bumps `kotlin` from 2.3.20 to 2.3.21.

Updates `org.jetbrains.kotlin.jvm` from 2.3.20 to 2.3.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.3.20...v2.3.21)

Updates `org.jetbrains.kotlin.plugin.serialization` from 2.3.20 to 2.3.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.3.20...v2.3.21)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin.jvm
  dependency-version: 2.3.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin.plugin.serialization
  dependency-version: 2.3.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot Bot force-pushed the dependabot/gradle/kotlin-2.3.21 branch from 52b1251 to e8660aa Compare May 6, 2026 10:26
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