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

Analysis API. Code Compilation

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

Analysis API. FIR

• KT-84711 K2 IDE sometimes loses FIR plugin-generated declarations after file changes
• KT-84596 Improve K2 Jooq completion performance
• KT-84525 KaValueParameterSymbol#getHasSynthesizedName returns false for FirDeclarationOrigin.SubstitutionOverride.DeclarationSite
• 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-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

• 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-83905 Analysis API: Improve UX with test data
• 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

• KT-83846 Set up guidelines for PSI
• KT-84135 Deprecate KtSelfType

Analysis API. Providers and Caches

• KT-82731 Analysis API: Limit granular tree change processing to a few files
• KT-79234 Analysis API: Usage of asMap() on Caffeine caches bypasses stats counters
• KT-74090 Analysis API: Support dumb mode (restricted analysis)

Analysis API. Standalone

• KT-83801 Nested typealiases are not correctly indexed in standalone mode

Analysis API. Surface

New Features

• KT-73534 SAM method API
• KT-82993 Support explicit backing fields in the Analysis API

Fixes

• KT-84397 KtDefaultAnnotationArgumentReference should return only results with value name
• KT-84804 buildSubstitutor does not work correctly with Java type parameters
• KT-84389 Cover references with ABI and documentation checks
• KT-57042 K2, Analysis API: KaJavaInteroperabilityComponent#callableSymbol returns null for a Java getter implementing Kotlin property
• KT-80856 Analysis API: analysisContextModule incorrectly determines the module of an original file when used for dangling file context assignment
• KT-84363 AA, isUsedAsExpression: Unhandled Non-KtExpression parent of KtExpression: class org.jetbrains.kotlin.psi.KtContractEffect
• KT-70476 Analysis API: "KtDefaultAnnotationArgumentReference.resolveToSymbols" does not work in FIR implementation
• KT-68499 Split KtDefaultAnnotationArgumentReference on K1 and K2 implementation
• KT-70521 Analysis API: Impossible to distinguish between 'iterator' operator calls dispatched with imports from objects
• KT-77669 Context arguments are missed on implicit invoke calls
• KT-77670 resolveToCall: extensionReceiver is incorrectly chosed due to a conflict with context parameters for an implicit invoke call
• KT-68633 K2 AA: IAE "Expected class KaClassSymbol instead of class KaFirEnumEntrySymbol" with enum entry initializer
• KT-79186 KtCompletionExtensionCandidateChecker does not work for extensions when using callable references of a type
• KT-83777 Analysis API: The resolution scope of a context module accepts elements from associated dangling files
• KT-82571 No expected type for overridden property without explicit type
• KT-83759 Analysis API: Mark platform interface APIs with [@KaPlatformInterface](https://github.com/KaPlatformInterface)
• KT-83223 Support "Explicit context arguments" in the Analysis API
• KT-65186 K2: Analysis API: KtExpressionTypeProvider.getExpectedType works incorrectly for the right hand side of assignment expressions
• KT-76011 KaFirNamedClassSymbol#companionObject doesn't provide generated objects generated by compiled plugins
• KT-73290 Analysis API: Improve the architecture of content scopes and resolution scopes

Backend. Native. Debug

• KT-83804 Native: debug information generator converts relative paths to absolute ones

Backend. Wasm

• KT-83162 K/Wasm: renaming temporary and synthetic variables in the Chrome debugger
• KT-85008 Develop and publish a demo app using an early version of the component model support
• KT-65030 K/Wasm: memory allocator for Component Model ABI
• KT-83607 WasmJS: Production build eliminates 'else if' branch when 'else' is not wrapped with curly braces
• KT-83728 [Wasm] Invalid Ir type while suspend call with blocked if null comprehansion
• KT-82803 Kotlin/WASM: Failed to compile the doResume function with if inside catch block
• KT-83800 [Wasm] Closed world per-module compilation

Compiler

New Features

• KT-84319 Add JVM target bytecode version 26
• KT-83165 Collection literals: treat Deprecated(HIDDEN) operators of reasonably
• KT-84487 "-Xcollection-literals" compiler flag
• KT-84072 Collection literals: treat visibility of of during resolve correctly
• KT-80500 Collection literals: Analyze ConeCollectionLiteralAtom in cases their expected type is not fully known
• KT-80491 Implement fallback mechanism for collection literals
• KT-80490 Implement overload resolution mechanism for collection literals
• KT-84484 Companion Extensions Analysis & Resolution
• KT-84199 Implement DontMakeExplicitNullableJavaTypeArgumentsFlexible feature
• KT-83765 Make -Xsuppress-version-warnings have a diagnostic ID
• KT-84288 Companion Blocks Analysis & Resolution
• KT-84287 Build Raw FIR for Companion Blocks & Extensions
• KT-84286 Parse Companion Blocks & Extensions
• KT-66344 K1 & K2: False positive WRONG_NUMBER_OF_TYPE_ARGUMENTS in callable reference to inner class member
• KT-76766 Warning is missing for wrong subclass checking
• KT-74049 Introduce special override rule to allow overriding T! with T & Any

Performance Improvements

• KT-84412 iOS release build time dramatically increases with 2.3.20-Beta2 compared to 2.3.10
• KT-80367 Reduce memory consumption of DevirtualizationAnalysis
• KT-82559 linkDebugTest*X64 tasks are slower for Kotlin 2.3 than for 2.2
• KT-84095 Improve Unit tail-call optimization to support inline generic functions similar to suspendCoroutine

Fixes

• KT-84559 [@OptIn](https://github.com/OptIn) on collection literal and context-sensitive does not work
• KT-84675 Collection literals: 'Not singleClassifierType superType: TypeVariable(S)' in PCLA
• KT-84547 Collection literals: "Expected expression 'FirCollectionLiteralImpl' to be resolved" in elvis expression
• KT-83920 False positive "modifier 'value' is not applicable to 'local variable'" with soft keyword in positional destructuring (square bracket) declaration
• KT-84190 Implement basic functionality for returnsResultOf contract
• KT-85058 Remove final field modification in DescriptorRendererOptionsImpl to prevent warnings on JDK 26+
• KT-72710 Incorrect behaviour of tail call suspend functions optimization
• KT-80590 Drop language version 1.9 for JVM
• KT-83904 [Inliner] Inline function overrides an abstract method with a default value in an inheritance chain
• KT-77584 Support scripts built from LT in scripting API
• KT-84185 Type arguments are wrongly allowed in receivers of static calls
• KT-83441 False positive: REDUNDANT_CALL_OF_CONVERSION_METHOD
• KT-83587 K2: Missing null-check when using == on Short! and Byte! platform types
• KT-84860 False positive UNINITIALIZED_ENUM_COMPANION in enum access with explicit receiver in enum initializer when enum class has a companion
• KT-84405 ClassCastException with conflicting projection on the LHS of a callable reference
• KT-84866 Reserve CoroutineContext as context parameter for future use
• KT-84717 Provide information for qualified expressions that might be replaced with context-sensitive simple names in IDE mode
• KT-65239 K2: Render FIR declaration instead of IR-based descriptors in IR signature clash diagnostics
• KT-84743 Type parameter declared as 'in' can be used in 'out' position in DNN & flexible types
• KT-84720 "Unused return value" is not reported inside used if/when multi-statement blocks
• KT-84198 Support multiple embedded .let-like calls with returnsResultOf contract
• KT-84310 No Warning Emitted For Deprecated Java Enum Value Usage
• KT-81871 Drop context receiver tests
• KT-80113 Consider improving diagnostic messages related to ==/===/is/as
• KT-84714 KJS: Forbid exporting properties with context parameters
• KT-84380 Type alias to non-generic class can have (arbitrary number of) type arguments in LHS of ::class
• KT-84366 Invalid name for captured this in bytecode
• KT-80701 Native: -Xbinary=cCallMode is not integrated with compiler caches
• KT-84000 Native: test pre-codegen inliner on CI
• KT-57557 Implement getAndSet for AtomicNativePtr via getAndSetField intrinsic
• KT-84352 createUninitializedInstance generates invalid LLVM for value classes
• KT-84411 Confusing message for the class reference of the inner class with the type parameter
• KT-84280 Standalone Unit qualifier allows type arguments: Unit<Any>
• KT-84281 Standalone typealias-to-object qualifier allows type arguments and has type Unit in this case
• KT-84594 EBF is smartcasted in inline function with [@PiblishedApi](https://github.com/PiblishedApi)
• KT-83938 Missing Tail call optimization in reference classes returning Unit
• KT-83989 Update coroutines-codegen.md after changes of Unit tailcall optimization
• KT-83988 Remove extraneous POP+GETSTATIC Unit for calls of Unit-returning suspend functions
• KT-80925 Replace "useless" in diagnostic messages
• KT-83646 Native: don't use sun.misc.Unsafe in ByteArrayStream when running on JVM 24+
• KT-82122 Prohibit arbitrary placement of type parameters in callable reference LHS
• KT-82574 Fixation: consider preferring EQUALS constraints to LOWER ones
• KT-83564 Consider dropping HAS_PROPER_NON_NOTHING_NON_ILT_LOWER_CONSTRAINT
• KT-84213 Flaky incremental compilation behaviour with EBF
• KT-84133 Adopt initInstance to handle value classes
• KT-24840 Square bracket escaping in KDoc
• KT-82123 KDoc: references that goes after markdown blocks don't have links
• KT-84196 Handle multiple entry/exit points for returnsResultOf functions
• KT-84195 Handle function references in returnsResultOf
• KT-84167 Invalid type references with type arguments in package parts compile without diagnostics
• KT-37179 false-positive shadowing warning on local and member extension functions in presence of member extension property with invoke operator
• KT-84209 False negative ACTUAL_ANNOTATIONS_NOT_MATCH_EXPECT on context parameters of function types
• KT-83354 Wrong position for lambda context type error
• KT-84206 Remove forcesPreReleaseBinaries = true from ExplicitBackingFields
• KT-83524 An anonymous function with named parameters throws FileAnalysisException
• KT-84155 K2: NO_CONTEXT_ARGUMENT caused by stale value in NewConstraintSystemImpl.hasContradictionInForkPointsCache
• KT-83829 False-negative INVALID_DEFAULT_FUNCTIONAL_PARAMETER_FOR_INLINE
• KT-83842 KIAEWA: Exception in expression checkers for [@OptIn](https://github.com/OptIn)(markerClass=[…])
• KT-84045 Evaluate default arguments of annotation's parameters using FIR evaluator
• KT-70562 [@SubclassOptInRequired](https://github.com/SubclassOptInRequired) cannot accept multiple experimental marker
• KT-83987 Refactor/fix CoroutineCodegen.isReadOfInlineLambda()
• KT-83772 Create a language feature for wrapContinuationForTailCallFunctions
• KT-84061 K2: IllegalStateException: FirResolvedNamedReference expected on plusAssign for array element with unresolved initializer inside buildList
• KT-83985 Drop arrayOf check from EscapeAnalysisChecker after bootstrap update
• KT-78885 Current frame disappears from stack trace when debugging inline-heavy suspend code
• KT-78727 Split KonanConfig into NativeFrontendConfig and NativeBackendConfig
• KT-83755 Support rendering of evaluated and original arguments in FirAnnotationRenderer#renderAnnotation
• KT-17763 Inner class constructor has incorrect generic signature in the bytecode
• KT-83625 Initialize annotations on Java record components
• KT-83795 Compiler crash on suspend lambda as default parameter of inline function
• KT-72880 Calls with incorrect VarHandle method signatures are generated with -Xjdk-release being used
• KT-67809 Native: remove support for non-opaque LLVM pointer types
• KT-82148 Suspend function returns the wrong value and not Unit
• KT-55559 JVM: ClassCastException with Unit returning suspend function and tail-call Non-Unit returning suspend function and callable reference
• KT-70995 Kotlin/Native: Treat all [@HasFinalizer](https://github.com/HasFinalizer) types as escaping in Escape Analysis
• KT-83903 'when' with 'val' does not take previous nullability check into account
• KT-83952 StackEntries for tail-call suspend functions have internal names for classes instead of FQ names
• KT-83377 Investigate usage of declarationSymbols in resolve of local user type
• KT-83770 Smartcast doesn't work for an explicit backing field with multiple intersections
• KT-83650 Native: don't use sun.misc.Unsafe in CastsOptimization when running on JVM 24+
• KT-83754 KotlinIllegalArgumentExceptionWithAttachments for explicit backing field with annotated type
• KT-83756 Error while resolving FirNamedFunctionImpl with explicit backing field and implicit type
• KT-83563 Consider dropping fixation readiness REIFIED
• KT-83713 K2: No error with external primary constructor parameter
• KT-83104 K2: No error with external enum entry
• KT-83696 Consider dropping HAS_NO_RELATION_TO_ANY_OUTPUT_TYPE readiness
• KT-83308 K/N: "IllegalArgumentException: An interface expected but was Any"
• KT-81590 Switch latest stable version in Kotlin project to 2.4
• KT-66701 K2: Java interface method override via Kotlin class rejected
• KT-56563 Inference within if stops working when changing expected type from Any to a different type

IR. Inlining

• KT-84112 Intra-module inliner: No container found for type parameter 'T'
• KT-84416 High memory usage for IrFileEntry after enabling inliner
• KT-75396 [IR] Pass LoweringContext to inline and serialization checkers
• KT-73708 Use some marker in KLIBs produced with IR inliner

IR. Interpreter

• KT-84561 K2: Convert evaluated constant by default in FIR2IR

IR. Tree

• KT-79663 KLIB-based compilers: Promote partial linkage to "always on"
• KT-76634 PL: Don't report warnings in cases that don't lead to runtime errors
• KT-72950 Partial Linkage: Change the semantics of -Xpartial-linkage-loglevel
• KT-79801 KLIBs: Implement checks for symbols loaded by the compiler on 1st and 2nd phases
• KT-72812 IR serializer: Don't serialize any cinterop fake overrides to Klibs

JVM. Reflection

• KT-85091 Reflection: "KotlinReflectionInternalError: Unsupported parameter owner: null" on attempt to get annotations of annotation constructor parameter
• KT-84796 Reflection: mutable flexibility is lost for K1-based types in KClass.allSupertypes
• KT-84494 Reflection: Java Collections have differences in kotlin supertypes from old K1 reflection
• KT-84382 Reflection: raw list in Java type is transformed to List instead of MutableList
• KT-84492 Reflection: supertypes of raw list in Java type are not raw
• KT-84076 Reflection: list in Java type is transformed to flexible instead of mutable list
• KT-14990 'callBy' for inner class constructor fails at run-time
• KT-82881 Reflection: update KCallable.callBy kdoc to mention vararg parameters
• KT-84075 Reflection: wildcard in Java type is transformed to out Any! instead of star projection
• KT-82659 Reflection: IAE on a call to a Java inner class constructor

JavaScript

New Features

• KT-51292 Proposed behavior of [@JsExport](https://github.com/JsExport) on interfaces and classes with companion objects
• KT-82128 [K/JS] Allow named companion objects in exported interfaces
• KT-21626 Support ES2015 syntax in js function
• KT-83452 K/JS: Support ES6 array destructuring in js() calls
• KT-83451 K/JS: Support ES6 object destructuring in js() calls

Performance Improvements

• KT-77646 KJS: optimize Byte/Char/Short/Int/Float/DoubleArray.copyOf(newSize)

Fixes

• KT-84002 Bump version from 2.3 to 2.4 for JsNoRuntime-related annotations
• KT-84090 Save variance in the generated TypeScript
• KT-84332 KJS: Reconsider disallowing nested classes in exported interfaces
• KT-56618 KJS/IR: Support external interfaces from common code (via annotation?)
• KT-84474 Kotlin/JS: Long::class becomes null when passing the value to a generic function with -Xes-long-as-bigint
• KT-83701 Escaped identifier with a quote cause an invalid d.ts file
• KT-84647 K/JS: Class expressions are not supported in js() calls
• KT-68281 K/JS: Order of classes in initMetadataForClass are not deterministic
• KT-84458 KJS: Fully support [@JsStatic](https://github.com/JsStatic) in Analysis API-based TypeScript Export
• KT-84454 KJS: Generate protected overrides for abstract class inheritors in Analysis API-based TypeScript Export
• KT-84490 KJS: Fix mutability of exported top-level variables Analysis API-based TS export with ES modules
• KT-84459 KJS: Support default exportability in Analysis API-based TypeScript Export
• KT-84456 KJS: Support deprecation comments in Analysis API-based TypeScript export
• KT-82264 Implement exporting classes in Analysis API-based TypeScript Export
• KT-84233 K/JS: exported collection views doesn't provide Iterator methods
• KT-82127 Remove generator-based coroutines intrinsics after bootstrap
• KT-84003 Remove [@Suppress](https://github.com/Suppress) from JsReference after bootstrap
• KT-44753 KJS / IR: [@JsExport](https://github.com/JsExport) non-public fun exports nothing
• KT-83992 Drop K1 JS entry point and IC code
• KT-69353 KJS / d.ts: Kotlin does not export base collection classes along with their mutable collection counterparts

Klibs

Performance Improvements

• KT-84451 [Klib] Use varint encoding for element sizes in IR tables
• KT-80903 [Klib] Optimize size of serialized IR element coordinates
• KT-84400 [Klib] Optimize size of serialized IrExpression
• KT-79675 K/N: Uncached ZipFIleSystemAccessor

Fixes

• KT-82471 [K/N] Klib forward compatibility testing with codegen tests
• KT-83807 Restore non-nullability of symbols not available in 2.3.0 stdlib
• KT-83929 Add tests for IR signatures of static properties and functions
• KT-83012 Export in previous version (Native): add the checker for incompatible Kotlin stdlib/compiler pairs
• KT-82469 [K/N] Klib backward compatibility testing with codegen tests
• KT-84341 Fix detection of box function in forward compatibility tests
• KT-81411 Merge KonanLibrary to KotlinLibrary to simplify adoption of KlibLoader in the Kotlin/Native compiler
• KT-83748 Bump versions in JS Klib compatibility testing
• KT-78188 [JS] Klib backward and forward compatibility testing
• KT-83724 Fix & unmute stdlib & kotlin-test compatibility tests
• KT-83151 Restore non-nullability of symbols available since 2.3

Language Design

• KT-80852 Version overloading: generate overloads corresponding to different versions of a function whose parameters are annotated with [@IntroducedAt](https://github.com/IntroducedAt)()

Libraries

New Features

• KT-73111 No UInt.toBigInteger() and ULong.toBigInteger() conversion function
• KT-78499 Add isSorted() extension to standard library

Fixes

• KT-83956 Clarify joinToString behavior when the receiver is empty
• KT-71848 Kotlinx.metadata: Add CompilerPluginData into Km API
• KT-61180 kotlin.ArrayIndexOutOfBoundsException on Native with Regex, works on Android/JVM though
• KT-84871 compareValues, nullsFirst, nullsLast return 0 for -0.0 and 0.0 on JS
• KT-84691 Add samples for toBigInteger extension functions
• KT-84372 PathExtensionsTest.copyToRestrictedReadSource fails with JDK22+
• KT-84369 StringJVMTest.formatter fails with JDK13+
• KT-84613 String.toDouble() produces incorrect results on Wasm for large exponent values
• KT-76905 Add samples for kotlin.math functions
• KT-84355 Reduce the number of iterations for the removeHashAtStressTest
• KT-83962 List.listIterator(Int) KDoc's exception condition is incorrect
• KT-83958 Improve enumValueOf documentation
• KT-83953 Add samples for kotlin.time extension functions
• KT-83951 Rewrite stdlib samples to use assertPrints instead of assertEquals

Native

• KT-84826 Bump the minimum deployment version of Apple targets
• KT-78686 LLVM update Q1 2026
• KT-82674 Native: dyld[...]: Symbol not found: _mach_vm_reclaim_update_kernel_accounting_trap on macOS
• KT-81748 Create a phased CLI for Native klib compilation
• KT-82879 Native: DLLs in the Windows distribution are not reproducible
• KT-83283 Test Kotlin/Native performance tests compilation in Gradle 9.0
• KT-82872 Native: make Kotlin/Native distribution compiler cache reproducible for Linux
• KT-82871 Native: cstubs.bc for android_* platform libraries contain absolute paths in string literals
• KT-34467 Cinterop: Clang crashes when -fmodule-map-file is specified (SIGSEGV)

Native. Build Infrastructure

• KT-80072 Make Kotlin/Native distribution reproducible
• KT-81771 konanc failing to load native libraries
• KT-84503 Duplicate META-INF/serialization.shadow.kotlin_module entry in kotlin-native-compiler-embeddable jar

Native. C and ObjC Import

• KT-81433 Generate C-interop KLIBs in previous ABI version in Kotlin 2.4.0
• KT-82766 K/N: external_source_symbol clang attribute causes cinterops with -fmodules to downgrade to forward declaration
• KT-82402 Inter-cinterop type reuse with -fmodules uses forward declaration when an actual declaration is available
• KT-82377 Fix ObjC forward declaration handling in modular cinterops
• KT-81695 Repeated typedefs across multiple clang modules break cinterop with -fmodules
• KT-81752 Native: investigate and remove filtering of -fmodule-map-file in cinterop
• KT-82379 Introduce lenient modular cinterop mode
• KT-83814 Native: includedHeaders= in platform libs manifests is not reproducible when modules= is used

Native. Runtime. Memory

• KT-80770 Kotlin/Native: revise ObjC refcount methods called in runnable state
• KT-84640 Native: comment for kotlin.native.runtime.SweepStatistics misses the word "number"

Native. Swift Export

New Features

• KT-82598 Swift Export: Custom name translation
• KT-66821 Swift Export: value class
• KT-84263 [Swift Export] Context Parameters on Functional Types
• KT-69431 Swift export: inline functions

Fixes

• KT-81593 Swift Export: suspend function returning Unit leads to incompilable code
• KT-84359 [Swift Export] nested functional type with Unit parameter
• KT-84358 [Swift Export] functional type with Unit parameter
• KT-84356 [Swift Export] functional type with single Unit parameter
• KT-83567 Swift Export: "IllegalStateException: Internal compiler error: doesn't correspond to any C type: kotlin.Unit": invalid closure is generated for suspend function which returns Unit
• KT-83397 [Swift Export] Functional return type with Unit parameter is emitted as invalid void parameter list ('void' must be the first and only parameter)
• KT-83743 Swift export: type arguments expected for generic typealias
• KT-84243 [Swift Export] Returning value of suspending functional type from suspending function yields invalid code
• KT-82568 Swift Export: Context Parameters
• KT-83398 [Swift export] converting non-escaping parameter to generic parameter may allow it to escape
• KT-83389 Swift Export: "ClassCastException" caused by suspend fun throwing Error
• KT-83116 Swift export generates bridges incompatible with language version 2.4
• KT-83749 [Swift Export] varargs and List uses the same mangling on bridges
• KT-83712 Swift Export ignores internal setter and generates invalid bridge code

Tools. BCV

• KT-78341 Outer scope's visibility is not considered when dumping const vals [ABI Validation JVM]
• KT-78305 Private constructor is written in ABI dump
• KT-82724 BCV incorrectly reports generated [@JvmOverloads](https://github.com/JvmOverloads) declarations as public
• KT-78367 Internal constructor infiltrated into a dump
• KT-78366 Protected method of enum should not be included into a dump

Tools. Build Tools API

New Features

• KT-80963 BTA: Add structured information about reported messages to KotlinLogger
• KT-84453 SSoT: provide a unified way to convert Enums to Strings

Fixes

• KT-82335 Promote the deprecation level for BTA prototype to the ERROR level
• KT-84015 Introduce detection of custom script names to new BTA API
• KT-83972 BTA: use isolated classloader for loading the BTA implementation in integration tests
• KT-84906 Make enum-based common arguments type-safe
• KT-75837 IC: Shrunk classpath snapshot name is hardcoded
• KT-84867 Make Xphases-to-* arguments type-safe
• KT-84850 Make kotlin-home type safe
• KT-84825 Make script-templates type safe
• KT-84546 Replace raw string path arguments with type-safe PathListType
• KT-84705 Make Xjdk-release to type-safe
• KT-84181 More verbose warning when CRI is enabled without using BTA
• KT-84436 Сompiler warnings are missing under Gradle -q option with -Werror
• KT-84324 Make X_ADD_MODULES BTA compiler argument type safe
• KT-84338 Make enum BTA JVM compiler argument type safe
• KT-84325 Make JVM_DEFAULT BTA compiler argument type safe
• KT-84449 Platform-Specific File.pathSeparator Hardcoded During SSOT Generation
• KT-84523 Add more forward compatibility tests
• KT-84249 Fix hardcoded path separator in -Xprofile argument to support absolute paths on Windows
• KT-84187 [BTA] Add more build operation immutability tests
• KT-84219 [BTA] Add additional tests on basic metrics collection
• KT-83781 Add additional tests for KT-79975 (BTA ability to cancel build operations)

Tools. CLI

• KT-84188 Create CLI argument for explicit context parameters
• KT-84609 Remove Nullability from Array-based CLI Compiler Arguments
• KT-84220 Enable Context Parameters by default in LV 2.4
• KT-84132 CLI: regression in deduplication of same-value arguments
• KT-83261 No error if pass an arbitrary string to a CLI argument that changes language features
• KT-83172 Boolean CLI argument for a language feature with explicit false value is allowed but has no effect
• KT-83341 Don't use the extension point registration mechanism from Intellij for K2 extensions

Tools. CLI. Native

• KT-82482 Compiler plugins are not propagated to frontend environment in ONE_STAGE_MULTI_MODULE Native mode

Tools. Compiler Plugins

• KT-66807 PowerAssert: Improve output diagram formatting
• KT-75266 PowerAssert: arrayOf() isn't displayed on the diagram
• KT-66808 PowerAssert: Add support for third-party assertion libraries
• KT-67332 "IndexOutOfBoundsException: Cannot pop operand off an empty stack." caused by function reference
• KT-83931 Power Assert: Compilation fails when using the metro plugin
• KT-83330 Lombok. An add methods with [@Singular](https://github.com/Singular) annotation in Java record doesn't work from kotlin
• KT-83204 Lombok. If [@Data](https://github.com/Data) and [@NoArgsConstructor](https://github.com/NoArgsConstructor) are used together, then the constructor from [@Data](https://github.com/Data) shouldn't be available
• KT-83336 Lombok. IllegalAccessError for constructor if [@Value](https://github.com/Value) and [@Builder](https://github.com/Builder) are applied and used from another package
• KT-83352 Lombok. FileAnalysisException when [@SuperBuilder](https://github.com/SuperBuilder) is used with [@Builder](https://github.com/Builder)
• KT-83325 Lombok. Constructor with parameters is unavailable for a class with [@Builder](https://github.com/Builder)

Tools. Gradle

Fixes

• KT-74451 Deprecate access to Kotlin source sets in Android extension
• KT-82847 Raise deprecation to error for LanguageSettings.enableLanguageFeature DSL
• KT-84053 Deprecate support for Gradle 7.6-8.13 versions
• KT-78659 Remove 'kotlin-android-extensions' plugin id
• KT-79924 Make enableKotlinToolingMetadataArtifact deprecated
• KT-82933 Add a tab with results in TC
• KT-83130 [ToolingDiagnostic] incorrect problem ID formatting for acronyms and undefined locations in Gradle8 problems reports
• KT-84144 Bump the minimal supported AGP version to 8.5.2
• KT-84143 Reduce usage of Project in Tooling Diagnostics
• KT-83126 Remove out-of-process compilation mode
• KT-80466 Gradle: remove getPluginArtifactForNative()
• KT-81834 Compile against AGP 8.13 API
• KT-82960 Remove deprecated enableKotlinToolingMetadataArtifact in 2.4.0
• KT-75004 KGP: improve messaging when multiplatform tasks are disabled on incompatible OSes
• KT-77498 Test .swiftmodules more accurate in SwiftExportIT
• KT-84377 Broken package-list file on KGP/CMPG documentation page
• KT-84141 Add convenient host check
• KT-83592 Enable AFU in FusStatisticsIT.testKotlinxPlugins test after next AFU release
• KT-83775 Migrate KGP functionalTest to junit5

Tools. Gradle. BCV

• KT-83486 Create tasks only if abiValidation block called explicitly [ABI Validation]
• KT-84365 Gradle plugin of abi-validation should precisely define output files
• KT-80685 Simplify Gradle DSL [ABI Validation]
• KT-82410 Remove word legacy from DSL [ABI Validation]
• KT-83898 Classes produced by JvmMultifileClass ignore filters

Tools. Gradle. Dokka

• KT-82984 Support AGP9 in Dokka Gradle Plugin

Tools. Gradle. JS

• KT-81036 K/JS, Wasm: Remove deprecated ExperimentalDceDsl
• KT-64275 Gradle: remove deprecated symbols related to the legacy JS target
• KT-81040 Gradle: Remove deprecated Kotlin/JS tasks constructors

Tools. Gradle. Multiplatform

• KT-82265 Remove Android source set layout v1
• KT-82230 Cleanup 'org.jetbrains.gradle.apple.applePlugin' plugin usage
• KT-81958 Redundant “android target already exists” error when migrating to com.android.kotlin.multiplatform.library with androidTarget {}

Tools. Gradle. Native

• KT-84558 Upstream SwiftPM import work
• KT-84656 Concurrent issue in downloadKotlinNativeDistribution
• KT-84508 Add a warning on usage macos_x64 as host
• KT-84692 Misleading error message for disableNativeCache DSL without required Opt-In
• KT-83680 Remove trailing commas from the package manifest to be compatible with pre-16.3 Xcode

Tools. Gradle. Wasm

• KT-83566 K/Wasm: Support Wasm per module/klib compilation in Gradle plugin
• KT-84137 K/Wasm: Support binaryen run with multiple files
• KT-84230 Wasm: Fix test WasmYarnGradlePluginIT.testWasmUsePredefinedTooling

Tools. Kapt

• KT-84094 Kotlin daemon holds file locks for too long
• KT-80569 K2 KAPT: Class Literals Missing in Explicit Annotation Value Parameters
• KT-18791 Kapt: Constants from R class should not be inlined

Tools. Maven

• KT-84793 Use kotlin bootstrap to build kotlin-maven-plugin
• KT-83110 Remove dependency to intellij platform from kotlin-maven-plugin-test
• KT-83113 Configure kotlin.git/.idea to work nicely with maven-kotlin-plugin-test tests
• KT-83114 Migrate kotlin-maven-plugin-test from maven.invoker to junit6 + maven-verifier

Tools. Performance benchmarks

• KT-82928 Support local run for new benchmarks infra
• KT-84283 Add scenario generator for performance tests
• KT-83257 Parse gradle profile report

Tools. REPL

• KT-84160 [REPL] Resolve eval function during implicit body
• KT-74683 [K2 Repl] Does not support suspend functions
• KT-83689 [K2 REPL] Create raw FIR tests for repl snippets
• KT-82554 [REPL] Fix unresolved reference when using dataframe compiler-plugin
• KT-82578 [K2 REPL] Split snippet property declaration and initialization
• KT-82503 [K2 Repl] Nested class annotations are not available in the next snippet

Tools. Wasm

• KT-84396 [Wasm] Support multimodule in incremental compilation