Upgrade Kotlin to 2.3.21 (#4676)

Author: dkhalanskyjb

README.md

@@ -21,7 +21,7 @@ suspend fun main() = coroutineScope {
 }
 ```
 
-> Play with coroutines online [here](https://pl.kotl.in/xdbDf0NNk)
+> Play with coroutines online [here](https://pl.kotl.in/HRBW8W1bd)
 
 ## Modules
 

buildSrc/src/main/kotlin/kotlin-multiplatform-conventions.gradle.kts

@@ -61,26 +61,17 @@ kotlin {
     js {
         outputModuleName = project.name
         nodejs()
-        compilations["main"]?.dependencies {
-            api("org.jetbrains.kotlinx:atomicfu:${version("atomicfu")}")
-        }
     }
     @OptIn(org.jetbrains.kotlin.gradle.ExperimentalWasmDsl::class)
     wasmJs {
         // Module name should be different from the one from JS
         // otherwise IC tasks that start clashing different modules with the same module name
         outputModuleName = project.name + "Wasm"
         nodejs()
-        compilations["main"]?.dependencies {
-            api("org.jetbrains.kotlinx:atomicfu:${version("atomicfu")}")
-        }
     }
     @OptIn(org.jetbrains.kotlin.gradle.ExperimentalWasmDsl::class)
     wasmWasi {
         nodejs()
-        compilations["main"]?.dependencies {
-            api("org.jetbrains.kotlinx:atomicfu:${version("atomicfu")}")
-        }
         compilations.configureEach {
             compileTaskProvider.configure {
                 compilerOptions {
@@ -112,7 +103,6 @@ kotlin {
             // workaround for #3968 until this is fixed on atomicfu's side
             api("org.jetbrains.kotlinx:atomicfu:0.23.1")
         }
-        jsMain { }
         val wasmJsMain by getting {
         }
         val wasmJsTest by getting {

gradle.properties

@@ -4,7 +4,7 @@ group=org.jetbrains.kotlinx
 # First-party dependencies.
 # ONLY rename these properties alongside adapting kotlinx.train build chain
 # and the `firstPartyDependencies` list in `buildSrc`.
-kotlin_version=2.2.20
+kotlin_version=2.3.21
 atomicfu_version=0.32.1
 
 # Dependencies

integration-testing/gradle.properties

@@ -1,4 +1,4 @@
-kotlin_version=2.2.20
+kotlin_version=2.3.21
 coroutines_version=1.11.0-SNAPSHOT
 asm_version=9.3
 junit5_version=5.7.0

kotlinx-coroutines-core/common/src/channels/BufferedChannel.kt

@@ -741,7 +741,7 @@ internal open class BufferedChannel<E>(
         index: Int,
         r: Long
     ) = suspendCancellableCoroutineReusable { cont ->
-        val waiter = ReceiveCatching(cont as CancellableContinuationImpl<ChannelResult<E>>)
+        val waiter = ReceiveCatching(cont)
         receiveImplOnNoWaiter(
             segment, index, r,
             waiter = waiter,

kotlinx-coroutines-core/common/src/channels/Deprecated.kt

@@ -656,6 +656,6 @@ internal fun ReceiveChannel<*>.consumes(): CompletionHandler = { cause: Throwabl
 public fun <E> CoroutineScope.produce(
     context: Job,
     capacity: Int = Channel.RENDEZVOUS,
-    @BuilderInference block: suspend ProducerScope<E>.() -> Unit
+    block: suspend ProducerScope<E>.() -> Unit
 ): ReceiveChannel<E> =
     produce(context as CoroutineContext, capacity, block)

kotlinx-coroutines-core/common/src/flow/operators/Transform.kt

@@ -126,7 +126,7 @@ public fun <T> Flow<T>.runningReduce(operation: suspend (accumulator: T, value:
         } else {
             operation(accumulator as T, value)
         }
-        emit(accumulator as T)
+        emit(accumulator)
     }
 }
 

kotlinx-coroutines-core/js/src/Promise.js.kt

@@ -1,5 +1,6 @@
 package kotlinx.coroutines
 
+@Suppress("USELESS_CAST") // on JS, arbitrary objects can be thrown
 @OptIn(ExperimentalWasmJsInterop::class)
 internal actual fun JsPromiseError.toThrowable(): Throwable = this as? Throwable ?:
     Exception("Promise resolved with a non-Throwable exception '$this' (type ${this::class})")

kotlinx-coroutines-core/jvm/resources/DebugProbesKt.bin

@@ -180,7 +180,7 @@ private fun createStackTrace(continuation: CoroutineStackFrame): ArrayDeque<Stac
 
     var last = continuation
     while (true) {
-        last = (last as? CoroutineStackFrame)?.callerFrame ?: break
+        last = last.callerFrame ?: break
         last.getStackTraceElement()?.let { stack.add(it) }
     }
     return stack