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Bump org.jetbrains.kotlin:kotlin-gradle-plugin from 2.3.21 to 2.4.0#542

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andrewparmet merged 5 commits into
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dependabot/gradle/org.jetbrains.kotlin-kotlin-gradle-plugin-2.4.0
Jul 8, 2026
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Bump org.jetbrains.kotlin:kotlin-gradle-plugin from 2.3.21 to 2.4.0#542
andrewparmet merged 5 commits into
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dependabot/gradle/org.jetbrains.kotlin-kotlin-gradle-plugin-2.4.0

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Bumps org.jetbrains.kotlin:kotlin-gradle-plugin from 2.3.21 to 2.4.0.

Release notes

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

Kotlin 2.4.0

Changelog

Analysis API

  • KT-83867 OVERLOAD_RESOLUTION_AMBIGUITY false positive with assertEquals in IJ repo
  • KT-83723 [Analysis API] Enable experimental KDoc resolver by default
  • KT-83388 Analysis API: properly support KMP in KotlinPackageProvider
  • KT-65683 Analysis API: Dangling file session creation causes a computeIfAbsent contract violation

Analysis API. Code Compilation

  • KT-78946 Evaluation of variable with local class in type parameter leads to InventNamesForLocalClasses exception

Analysis API. FIR

  • KT-68260 K2 AA: InvalidFirElementTypeException “For CALLABLE_REFERENCE_EXPRESSION with text ::lam1, unexpected element of type: no element found” with illegal callable reference call
  • KT-70896 AA: False positive deprecation warning with override of built-in method in JDK mapped class
  • KT-84711 K2 IDE sometimes loses FIR plugin-generated declarations after file changes
  • KT-84625 Analysis API: collectDesignationPath fails for nested classes inside plugin-generated top-level classes
  • KT-84596 Improve K2 Jooq completion performance
  • KT-84525 KaValueParameterSymbol#getHasSynthesizedName returns false for FirDeclarationOrigin.SubstitutionOverride.DeclarationSite
  • KT-83546 Kotlin analysis reach ClsCustomNavigationPolicy
  • KT-84259 Move CommonDefaultImportsProvider to the frontend independent module
  • KT-82945 Analysis API: KotlinIllegalArgumentExceptionWithAttachments: Expected FirResolvedTypeRef with ConeKotlinType but was FirUserTypeRefImpl
  • KT-71135 AA: exception from sealed inheritors checker when analyzeCopy

Analysis API. Infrastructure

Fixes

  • KT-83905 Analysis API: Improve UX with test data
  • KT-84913 Extract compiler classes used by the PSI & Analysis API to a separate module
  • KT-64986 Analysis API: Implement Analysis API tests for different KMP Platforms
  • KT-84776 The test data manager misses the redundancy check in the update mode
  • KT-84962 The test data manager misses -ea flag
  • KT-84388 Preserve the EOF status in the test data manager to avoid extra changes
  • KT-84362 Analysis API tests produce many warnings due to "not yet loaded registry"
  • KT-84279 Test Data Manager fails on a clean build
  • KT-83913 Exclude compiler-based Analysis API tests from Git tracking
  • KT-80379 Extract per-module test generators for AA tests
  • KT-84120 Move CLI modules out of kotlin-compiler-fe10-for-ide
  • KT-83200 Track external dependencies of the Analysis API modules

Analysis API. Light Classes

  • KT-82434 Light classes should prefer enum entries to properties
  • KT-84200 SLC: return type is not boxed for delegated methods with generic original method
  • KT-72451 "CCE: class PsiPrimitiveType cannot be cast to class PsiClassType" with same-named enum class and typealias

... (truncated)

Changelog

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

2.4.0

Analysis API

  • KT-83867 OVERLOAD_RESOLUTION_AMBIGUITY false positive with assertEquals in IJ repo
  • KT-83723 [Analysis API] Enable experimental KDoc resolver by default
  • KT-83388 Analysis API: properly support KMP in KotlinPackageProvider
  • KT-65683 Analysis API: Dangling file session creation causes a computeIfAbsent contract violation

Analysis API. Code Compilation

  • KT-78946 Evaluation of variable with local class in type parameter leads to InventNamesForLocalClasses exception

Analysis API. FIR

  • KT-68260 K2 AA: InvalidFirElementTypeException “For CALLABLE_REFERENCE_EXPRESSION with text ::lam1, unexpected element of type: no element found” with illegal callable reference call
  • KT-70896 AA: False positive deprecation warning with override of built-in method in JDK mapped class
  • KT-84711 K2 IDE sometimes loses FIR plugin-generated declarations after file changes
  • KT-84625 Analysis API: collectDesignationPath fails for nested classes inside plugin-generated top-level classes
  • KT-84596 Improve K2 Jooq completion performance
  • KT-84525 KaValueParameterSymbol#getHasSynthesizedName returns false for FirDeclarationOrigin.SubstitutionOverride.DeclarationSite
  • KT-83546 Kotlin analysis reach ClsCustomNavigationPolicy
  • KT-84259 Move CommonDefaultImportsProvider to the frontend independent module
  • KT-82945 Analysis API: KotlinIllegalArgumentExceptionWithAttachments: Expected FirResolvedTypeRef with ConeKotlinType but was FirUserTypeRefImpl
  • KT-71135 AA: exception from sealed inheritors checker when analyzeCopy

Analysis API. Infrastructure

Fixes

  • KT-83905 Analysis API: Improve UX with test data
  • KT-84913 Extract compiler classes used by the PSI & Analysis API to a separate module
  • KT-64986 Analysis API: Implement Analysis API tests for different KMP Platforms
  • KT-84776 The test data manager misses the redundancy check in the update mode
  • KT-84962 The test data manager misses -ea flag
  • KT-84388 Preserve the EOF status in the test data manager to avoid extra changes
  • KT-84362 Analysis API tests produce many warnings due to "not yet loaded registry"
  • KT-84279 Test Data Manager fails on a clean build
  • KT-83913 Exclude compiler-based Analysis API tests from Git tracking
  • KT-80379 Extract per-module test generators for AA tests
  • KT-84120 Move CLI modules out of kotlin-compiler-fe10-for-ide
  • KT-83200 Track external dependencies of the Analysis API modules

Analysis API. Light Classes

  • KT-82434 Light classes should prefer enum entries to properties
  • KT-84200 SLC: return type is not boxed for delegated methods with generic original method
  • KT-72451 "CCE: class PsiPrimitiveType cannot be cast to class PsiClassType" with same-named enum class and typealias

Analysis API. PSI

... (truncated)

Commits
  • add726c Add ChangeLog for 2.4.0-RC2
  • 69a4a81 [Wasm] Add binaryen per-file arguments
  • 8907c63 [KGP] Suppress duplicate compiler warning output when --warning-mode=all is a...
  • f9bef12 [KGP] Add failing test for duplicate compiler warning output via Problems API
  • 7fe49c2 KT-86268: Use 2.4.0 toolchain for abiValidation with older CVs
  • 13d25e2 KT-86268: Regression test added
  • f7d1a76 [JKlib] Fix JAR deserializer configuration.
  • 5cec663 [JKlib] Wire up JvmBuiltInClassDescriptorFactory
  • ef14611 Make the default stability of non-final classes Unknown instead of Stable
  • d76473a [Gradle] Fix GeneralNativeIT.shouldAllowToOverrideDownloadUrl test failures
  • 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 Jun 22, 2026
@dependabot
Bump org.jetbrains.kotlin:kotlin-gradle-plugin from 2.3.21 to 2.4.0
5fce289 
Bumps [org.jetbrains.kotlin:kotlin-gradle-plugin](https://github.com/JetBrains/kotlin) from 2.3.21 to 2.4.0.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.3.21...v2.4.0)

---
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
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot Bot force-pushed the dependabot/gradle/org.jetbrains.kotlin-kotlin-gradle-plugin-2.4.0 branch from dd042c3 to 5fce289 Compare July 7, 2026 17:24
@andrewparmet
Support Kotlin 2.4, drop Kotlin 2.1
19fcc2d 
- Integration matrix: test Kotlin 2.2.21, 2.3.21, and 2.4.0; drop 2.1.21
- Raise language/API version to 2.2 across the build and standalone examples
- Generate 'null -> {}' instead of 'null -> Unit' in oneof when branches;
  Kotlin 2.4 flags the latter as an unused expression under -Werror
- Filter friend-module paths to the dependsOn closure and skip jar-based
  friend paths for non-JVM compilations; Kotlin 2.4 warns on friend modules
  absent from the library path
- Opt in to UnsafeNumber for posix calls with platform-dependent bit widths
- Upgrade kotlin-js-store yarn.lock
@andrewparmet
Fix remaining Kotlin 2.4 warnings-as-errors
88d2da9 
- Suppress UNUSED_EXPRESSION in EnumsWithSharedPrefixTest; Kotlin 2.4 flags
  bare enum references as unused expressions
- Ignore new kotlin-stdlib JDK8PlatformImplementations references to
  Map.getOrDefault, ConcurrentMap.computeIfAbsent, and java.util.function.Function
  in the expediter Android compatibility check
@andrewparmet
Use an import for KotlinSourceSet in RuntimeFriendPaths
4cb5ccf
@andrewparmet
Bump kotlinx-rpc compiler plugin Kotlin version to 2.4.0
4c5290b 
The standalone kRPC example pins the Kotlin Gradle plugin to the newest
version supported by the kotlinx-rpc compiler plugin. Kotlin 2.3.20 cannot
read klibs produced by 2.4.0, and a 2.4.0 compiler plugin build now exists
for kotlinx-rpc 0.11.0-grpc-188.
@andrewparmet andrewparmet merged commit 422ecd4 into main Jul 8, 2026
31 checks passed
@andrewparmet andrewparmet deleted the dependabot/gradle/org.jetbrains.kotlin-kotlin-gradle-plugin-2.4.0 branch July 8, 2026 00:00
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