v1.9.0

Compare Source

Features

• Wasm/WASI target support (#​4064). Thanks, @​igoriakovlev!
• limitedParallelism now optionally accepts the name of the dispatcher view for easier debugging (#​4023).
• No longer initialize Dispatchers.IO on the JVM when other standard dispatchers are accessed (#​4166). Thanks, @​metalhead8816!
• Introduced the Flow<T>.chunked(size: Int): Flow<List<T>> operator that groups emitted values into groups of the given size (#​1290).
• Closeable dispatchers are instances of AutoCloseable now (#​4123).

Fixes

• Calling hasNext on a Channel's iterator is idempotent (#​4065). Thanks, @​gitpaxultek!
• CoroutineScope() created without an explicit dispatcher uses Dispatchers.Default on Native (#​4074). Thanks, @​whyoleg!
• Fixed a bug that prevented non-Android Dispatchers.Main from initializing when the Firebase dependency is used (#​3914).
• Ensured a more intuitive ordering of tasks in runBlocking (#​4134).
• Forbid casting a Mutex to Semaphore (#​4176).
• Worked around a stack overflow that may occur when calling asDeferred on a Future many times (#​4156).

Deprecations and promotions

• Advanced the deprecation levels for BroadcastChannel-based API (#​4197).
• Advanced the deprecation levels for the old kotlinx-coroutines-test API (#​4198).
• Deprecated Job.cancelFutureOnCompletion (#​4173).
• Promoted CoroutineDispatcher.limitedParallelism to stable (#​3864).
• Promoted CoroutineStart.ATOMIC from ExperimentalCoroutinesApi to DelicateCoroutinesApi (#​4169).
• Promoted CancellableContinuation.resume with an onCancellation lambda to stable, providing extra arguments to the lambda (#​4088).
• Marked the classes and interfaces that are not supposed to be inherited from with the new InternalForInheritanceCoroutinesApi opt-in (#​3770).
• Marked the classes and interfaces inheriting from which is not stable with the new ExperimentalForInheritanceCoroutinesApi opt-in (#​3770).

Other

• Kotlin was updated to 2.0 (#​4137).
• Reworked the documentation for CoroutineStart and Channel-based API (#​4147, #​4148, #​4167). Thanks, @​globsterg!
• Simplified the internal implementation of Job (#​4053).
• Small tweaks, fixes, and documentation improvements.

v2.0.21

Apple Ecosystem

• KT-69093 Xcode 16 support in Kotlin

Backend. Native. Debug

• KT-71374 lldb: step out breaks breaking in Xcode 16

Compiler

Fixes

• KT-69735 K2: Static fields are missing from the declaration list of corresponding IrClass for java class
• KT-71122 Regression in Kotlin Compiler 2.0 causing NPE in the runtime
• KT-70931 K2 / Scripts: "cannot convert IrExpression to ConstantValue" when using function annotation
• KT-70584 K2: "IllegalStateException: flow for PostponedLambdaExitNode not initialized - traversing nodes in wrong order?"
• KT-70808 K2: "node has already been visited" with anonymous object in dead code
• KT-69985 K2: Classifier declarations from root package are resolved without imports in non-root packages
• KT-70683 K2: Internal compiler error in IrFakeOverrideSymbolBase.getOwner
• KT-70901 False positive Public-API inline function cannot access non-public-API property accessor
• KT-70930 K2: Java annotations not present on ENUM_ENTRY IR elements
• KT-70194 K2 IDE: exception on a very red file
• KT-69399 Native: IllegalStateException: "Failed to build cache"

Compose compiler

Fixes

• b/329477544 Force open / overridden Composable functions to be non-restartable.
• b/361652128 Disable live literal transform if the corresponding flag is disabled

IR. Actualizer

• KT-70894 IR crash. Unprocessed IrFunctionFakeOverrideSymbol when actualize to Java

IR. Tree

• KT-71191 SymbolTable: Check if the provided signature is public before adding a symbol to the SymbolTable

Native. Build Infrastructure

• KT-71485 K/N runtime parts don't build due to _Float16 issues on x86_64 macOS

Native. C Export

• KT-69507 LLVM 11 clang with Xcode 16 headers: standard c++ headers

Native. C and ObjC Import

• KT-71029 Investigate why stdarg.h declarations leak into testModuleA

Native. Platform Libraries

• KT-70566 LLVM 11 clang with Xcode 16 headers: 'sys/cdefs.h' file not found
• KT-71624 Eliminate remaining UIKit/AppKit removed signatures
• KT-70031 Rebuild platform libraries in 2.0.21 with Xcode 16

Native. Testing

• KT-70603 C++ with -fmodules: cyclic dependency in module 'std': std -> _wctype -> __wctype -> std in dev llvm toolchains

Tools. CLI. Native

• KT-71262 KotlinNativeLink tasks fetching from network despite -Xoverride-konan-properties=dependenciesUrl= being set

Tools. Compiler Plugins

• KT-71038 PowerAssert: Constant on RHS of elvis operator leads to compiler crash

Tools. Daemon

• KT-35381 Get rid of the native-platform usage in kotlin compiler

Tools. Gradle. Multiplatform

• KT-71444 Certain POMs produced by Kotlin 2.0.20 cannot be consumed by KMP projects with Android targets
• KT-70700 Gradle 8.10: The value for task ':commonizeNativeDistribution' property 'kotlinNativeBundleBuildService' cannot be changed any further
• KT-71396 Gradle client side JVM explodes with OOM due to xcodebuild logs

Tools. Gradle. Native

• KT-71419 Light bundle KGP IT run against a stable K/N version

Tools. JPS

• KT-71450 Constant build failure: com.intellij.util.io.ClosedStorageException: storage is already closed