Kotlin

Changelog

Analysis API. FIR

New Features

• KT-78090 Implement stubs support for new conditional returns and holdsIn contracts

Fixes

• KT-80485 False positive UNRESOLVED_REFERENCE on nested interface from super-super class in the super type position inside an anonymous object
• KT-82948 'FirRegularClass' expected as a containing declaration, got 'FirTypeAliasImpl'
• KT-82057 K2. Cannot infer type parameter 'R' in Ktor routing post() function with explicit response type
• KT-82772

Changelog

Analysis API

• KT-80082 K2. False positive "Cannot resolve method" for self-bounded generic with wildcard return type in Java interop
• KT-80303 Move :native:analysis-api-klib-reader to :libraries:tools

Analysis API. Code Compilation

• KT-70860 K2 IDE / Kotlin Debugger: CCE “java.lang.String cannot be cast to java.lang.Void” on evaluating not-null variable on the line with assigning null to that var
• KT-78554 K2 IDE / Kotlin Debugger: ISE “No override for FUN IR_EXTERNAL_DECLARATION_STUB” on calling toString() for local class instance during evaluation
• KT-73201 K2 IDE: Error wh

Changelog

Compiler

• KT-82869 Green-to-Red change in 2.3 after prioritizing non-suspend-function-type overloads

Libraries

• KT-82901 Long.MIN_VALUE.milliseconds produces invalid denormalized Duration

Changelog

Compiler

• KT-82590 ClassCastException when instantiating class with generics implemented by fun interface and lambda

Tools. Compiler Plugin API

• KT-82563 Improve compiler error messages to identify incompatible plugins causing compilation failures

Changelog

Backend. Wasm

• KT-82075 K/Wasm: kotlin.wasm.internal.getSimpleName crashes on iOS Safari older than 26

Compiler

• KT-82138 Debugger: Cannot evaluate JvmInline value class parameter
• KT-78413 Kotlin Debugger: value classes as context parameters have incorrect names in Variables View during debugging
• KT-80549 Call of Java method with type parameter bounds: Expected FirResolvedTypeRef with ConeKotlinType but was FirJavaTypeRef
• KT-82132 False-positive type mismatch with -language-version 2.2<

Changelog

Analysis API

• KT-80082 K2. False positive "Cannot resolve method" for self-bounded generic with wildcard return type in Java interop

Analysis API. Code Compilation

• KT-70860 K2 IDE / Kotlin Debugger: CCE “java.lang.String cannot be cast to java.lang.Void” on evaluating not-null variable on the line with assigning null to that var

Analysis API. FIR

• KT-81378 Expected expression 'FirFunctionCallImpl' to be resolved caused by suspend {}
• KT-80473 Add events for tracking LL ac

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 (vm inside Safari, WebKit)

Compiler

• KT-81191 K2: "null cannot be cast to non-null type ConeTypeParameterLookupTag" with invalid code
• KT-80936 NON_PUBLIC_CALL_FROM_PUBLIC_INLINE : @PublishedApi doesn't work for fun interfaces

JavaScript

• KT-79926 Wrong export of interfaces with companions with ES Modules
• KT-81424 Kotlin/JS: Cannot Get / i

Changelog

Tools. Gradle. Native

• KT-81134 Native: Gradle configuration failure likely related to Klibs cross-compilation
• KT-81510 commonizeCInterop exception with 'kotlinNativeBundleConfiguration' not found

Changelog

Analysis API

• KT-80303 Move :native:analysis-api-klib-reader to :libraries:tools

Analysis API. Code Compilation

• KT-80227 Support unnamed context parameters in evaluation
• KT-78554 K2 IDE / Kotlin Debugger: ISE “No override for FUN IR_EXTERNAL_DECLARATION_STUB” on calling toString() for local class instance during evaluation
• KT-73201 K2 IDE: Error while evaluating expressions with local classes

Analysis API. FIR

• KT-46375 An

Changelog

Analysis API

• KT-78187 Synthetic properties not to be shown as callables
• KT-72525 K2. red code and KIWA on new-lines in guarded when conditions (with parentheses)
• KT-74246 KaVisibilityChecker.isVisible is inefficient with multiple calls on the same use-site

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: '@JvmName' annotations are not recognized in other modules
• KT-76457 K2 IDE /

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 Interfaces implemented by delegation have non-null return checks

Native. C and ObjC Import

• KT-79571 Xcode 26 beta 4: CInteropKT39120TestGenerated.testForwardEnum failed

Tools. Gradle

• KT-80172 Error message changes depending on the o