details.txt

Kotlin version: 1.4.10
Coroutines version: 1.3.9-native-mt-2

When the test is run on the iOS simulator the following exception is thrown:

kotlin.native.concurrent.InvalidMutabilityException: mutation attempt of frozen kotlinx.coroutines.sync.MutexImpl.LockedQueue@788375b8
    at 0   test.kexe                           0x0000000104103a5d kfun:kotlin.Throwable#<init>(kotlin.String?){} + 93 (/Users/teamcity/buildAgent/work/cae0e6559deed4c4/runtime/src/main/kotlin/kotlin/Throwable.kt:23:37)
    at 1   test.kexe                           0x00000001040fc83b kfun:kotlin.Exception#<init>(kotlin.String?){} + 91 (/Users/teamcity/buildAgent/work/cae0e6559deed4c4/runtime/src/main/kotlin/kotlin/Exceptions.kt:23:44)
    at 2   test.kexe                           0x00000001040fc9fb kfun:kotlin.RuntimeException#<init>(kotlin.String?){} + 91 (/Users/teamcity/buildAgent/work/cae0e6559deed4c4/runtime/src/main/kotlin/kotlin/Exceptions.kt:34:44)
    at 3   test.kexe                           0x0000000104133d4b kfun:kotlin.native.concurrent.InvalidMutabilityException#<init>(kotlin.String){} + 91 (/Users/teamcity/buildAgent/work/cae0e6559deed4c4/runtime/src/main/kotlin/kotlin/native/concurrent/Freezing.kt:22:60)
    at 4   test.kexe                           0x0000000104135602 ThrowInvalidMutabilityException + 690 (/Users/teamcity/buildAgent/work/cae0e6559deed4c4/runtime/src/main/kotlin/kotlin/native/concurrent/Internal.kt:92:11)
    at 5   test.kexe                           0x000000010424a89c MutationCheck + 108
    at 6   test.kexe                           0x0000000104339506 kfun:kotlinx.coroutines.sync.MutexImpl.LockedQueue.<set-owner>#internal + 102 (/opt/buildAgent/work/44ec6e850d5c63f0/kotlinx-coroutines-core/common/src/sync/Mutex.kt:350:19)
    at 7   test.kexe                           0x000000010433877c kfun:kotlinx.coroutines.sync.MutexImpl#unlock(kotlin.Any?){} + 3740 (/opt/buildAgent/work/44ec6e850d5c63f0/kotlinx-coroutines-core/common/src/sync/Mutex.kt:327:29)
    at 8   test.kexe                           0x0000000104045a4e kfun:MutexInvalidMutabilityTest.$doTest$lambda-2$lambda-0COROUTINE$0.invokeSuspend#internal + 2206 (MutexInvalidMutabilityTest.kt:16:61)
    at 9   test.kexe                           0x0000000104126026 kfun:kotlin.coroutines.native.internal.BaseContinuationImpl#resumeWith(kotlin.Result<kotlin.Any?>){} + 758 (/Users/teamcity/buildAgent/work/cae0e6559deed4c4/runtime/src/main/kotlin/kotlin/coroutines/ContinuationImpl.kt:30:39)
    at 10  test.kexe                           0x0000000104325862 kfun:kotlinx.coroutines.DispatchedTask#run(){} + 2802 (/opt/buildAgent/work/44ec6e850d5c63f0/kotlinx-coroutines-core/common/src/internal/DispatchedTask.kt:39:50)
    at 11  test.kexe                           0x00000001042d7ea6 kfun:kotlinx.coroutines.EventLoopImplBase#processNextEvent(){}kotlin.Long + 838 (/opt/buildAgent/work/44ec6e850d5c63f0/kotlinx-coroutines-core/common/src/EventLoop.common.kt:274:18)
    at 12  test.kexe                           0x000000010434737f kfun:kotlinx.coroutines#runEventLoop(kotlinx.coroutines.EventLoop?;kotlin.Function0<kotlin.Boolean>){} + 911 (/opt/buildAgent/work/44ec6e850d5c63f0/kotlinx-coroutines-core/native/src/Builders.kt:80:40)
    at 13  test.kexe                           0x0000000104350c37 kfun:kotlinx.coroutines.WorkerCoroutineDispatcherImpl.start$lambda-0#internal + 407 (/opt/buildAgent/work/44ec6e850d5c63f0/kotlinx-coroutines-core/native/src/Workers.kt:49:17)
    at 14  test.kexe                           0x0000000104350e1e kfun:kotlinx.coroutines.WorkerCoroutineDispatcherImpl.$start$lambda-0$FUNCTION_REFERENCE$35.invoke#internal + 62 (/opt/buildAgent/work/44ec6e850d5c63f0/kotlinx-coroutines-core/native/src/Workers.kt:47:24)
    at 15  test.kexe                           0x0000000104350e7e kfun:kotlinx.coroutines.WorkerCoroutineDispatcherImpl.$start$lambda-0$FUNCTION_REFERENCE$35.$<bridge-UNN>invoke(){}#internal + 62 (/opt/buildAgent/work/44ec6e850d5c63f0/kotlinx-coroutines-core/native/src/Workers.kt:47:24)
    at 16  test.kexe                           0x00000001041351a7 WorkerLaunchpad + 183 (/Users/teamcity/buildAgent/work/cae0e6559deed4c4/runtime/src/main/kotlin/kotlin/native/concurrent/Internal.kt:69:54)
    at 17  test.kexe                           0x000000010424fe2f _ZN6Worker19processQueueElementEb + 3135
    at 18  test.kexe                           0x000000010424f1d6 _ZN12_GLOBAL__N_113workerRoutineEPv + 54
    at 19  libsystem_pthread.dylib             0x00007fff5dcdc109 _pthread_start + 148
    at 20  libsystem_pthread.dylib             0x00007fff5dcd7b8b thread_start + 15

MutexInvalidMutabilityTest.kt

import kotlinx.coroutines.delay
import kotlinx.coroutines.launch
import kotlinx.coroutines.newSingleThreadContext
import kotlinx.coroutines.runBlocking
import kotlinx.coroutines.sync.Mutex
import kotlinx.coroutines.sync.withLock
import kotlin.native.concurrent.ensureNeverFrozen
import kotlin.test.Test

class MutexInvalidMutabilityTest {
    @Test
    fun doTest() {
        runBlocking(newSingleThreadContext("thread")) {
            val mutex = Mutex().apply { ensureNeverFrozen() }
            launch {
                runCatching { mutex.withLock { delay(1000) } }.exceptionOrNull()?.printStackTrace()
            }
            launch {
                runCatching { mutex.withLock { delay(1000) } }.exceptionOrNull()?.printStackTrace()
            }
        }
    }
}