InvalidMutabilityException raised by withTimeout {} when the scope is frozen (1.5.0-RC-native-mt)

[andersio]

Environment:

• Kotlin 1.5.0
• Coroutines 1.5.0-RC-native-mt
• iosX64 target

Issues

Neither of these issues apply to 1.4.3-native-mt on Kotlin 1.4.32.

1. withTimeout {} throws InvalidMutabilityException, when the CoroutineScope it being launched in is frozen.
2. runBlocking {} does not stop spinning after InvalidMutabilityException is thrown.

Case to reproduce

    @Test
    fun reprod() = runTesting {
        this.freeze()

        try {
            withTimeout(Duration.seconds(10)) {
                print("Hello world")
            }
        } catch (error: Throwable) {
            print("Exception: $error")
            error.printStackTrace()

            throw error
        }
    }

    @Test
    fun reprod() = runTesting {
        try {
            coroutineScope {
                this.freeze()
                withTimeout(Duration.seconds(10)) {
                    print("Hello world")
                }
            }
        } catch (error: Throwable) {
            print("Exception: $error")
            error.printStackTrace()

            throw error
        }
    }

Stack trace

Exception: kotlin.native.concurrent.InvalidMutabilityException: mutation attempt of frozen kotlinx.coroutines.TimeoutCoroutine@a7c1fd08kotlin.native.concurrent.InvalidMutabilityException: mutation attempt of frozen kotlinx.coroutines.TimeoutCoroutine@a7c1fd08
Invalid connection: com.apple.coresymbolicationd
    at 0   test.kexe                           0x000000010ff16c3f kfun:kotlin.Throwable#<init>(kotlin.String?){} + 95 (/Users/teamcity1/teamcity_work/290aee0e088a1666/runtime/src/main/kotlin/kotlin/Throwable.kt:23:37)
    at 1   test.kexe                           0x000000010ff0fb5d kfun:kotlin.Exception#<init>(kotlin.String?){} + 93 (/Users/teamcity1/teamcity_work/290aee0e088a1666/runtime/src/main/kotlin/kotlin/Exceptions.kt:23:44)
    at 2   test.kexe                           0x000000010ff0fdcd kfun:kotlin.RuntimeException#<init>(kotlin.String?){} + 93 (/Users/teamcity1/teamcity_work/290aee0e088a1666/runtime/src/main/kotlin/kotlin/Exceptions.kt:34:44)
    at 3   test.kexe                           0x000000010ff4572d kfun:kotlin.native.concurrent.InvalidMutabilityException#<init>(kotlin.String){} + 93 (/Users/teamcity1/teamcity_work/290aee0e088a1666/runtime/src/main/kotlin/kotlin/native/concurrent/Freezing.kt:22:60)
    at 4   test.kexe                           0x000000010ff46f2f ThrowInvalidMutabilityException + 431 (/Users/teamcity1/teamcity_work/290aee0e088a1666/runtime/src/main/kotlin/kotlin/native/concurrent/Internal.kt:93:11)
    at 5   test.kexe                           0x00000001100b9600 MutationCheck + 128
    at 6   test.kexe                           0x0000000110122e0f kfun:kotlinx.coroutines.TimeoutCoroutine.<init>#internal + 303 (/opt/buildAgent/work/44ec6e850d5c63f0/kotlinx-coroutines-core/common/src/Timeout.kt:152:5)
    at 7   test.kexe                           0x0000000110121f85 kfun:kotlinx.coroutines#withTimeout(kotlin.Long;kotlin.coroutines.SuspendFunction1<kotlinx.coroutines.CoroutineScope,0:0>){0§<kotlin.Any?>}0:0 + 341 (/opt/buildAgent/work/44ec6e850d5c63f0/kotlinx-coroutines-core/common/src/Timeout.kt:44:22)
    at 8   test.kexe                           0x000000011012214a kfun:kotlinx.coroutines#withTimeout(kotlin.time.Duration;kotlin.coroutines.SuspendFunction1<kotlinx.coroutines.CoroutineScope,0:0>){0§<kotlin.Any?>}0:0 + 202 (/opt/buildAgent/work/44ec6e850d5c63f0/kotlinx-coroutines-core/common/src/Timeout.kt:72:12)
    at 9   test.kexe                           0x000000010feafa4a kfun:me.sphere.appcore.utils.LoopTests.$reprod$lambda-4COROUTINE$2.invokeSuspend#internal + 794 (/Users/anders/repos/ios/AppCore/appcore-utils/src/commonTest/kotlin/me/sphere/appcore/utils/LoopTests.kt:43:13)
    at 10  test.kexe                           0x000000010feaff7b kfun:me.sphere.appcore.utils.LoopTests.$reprod$lambda-4COROUTINE$2.invoke#internal + 331 (/Users/anders/repos/ios/AppCore/appcore-utils/src/commonTest/kotlin/me/sphere/appcore/utils/LoopTests.kt:39:31)
    at 11  test.kexe                           0x000000010fea8ca7 kfun:me.sphere.test.support.$runTesting$lambda-0COROUTINE$14.invokeSuspend#internal + 679 (/Users/anders/repos/ios/AppCore/appcore-test-utils/src/iosMain/kotlin/me/sphere/test/support/runTesting.kt:6:80)
    at 12  test.kexe                           0x000000010ff38a40 kfun:kotlin.coroutines.native.internal.BaseContinuationImpl#resumeWith(kotlin.Result<kotlin.Any?>){} + 800 (/Users/teamcity1/teamcity_work/290aee0e088a1666/runtime/src/main/kotlin/kotlin/coroutines/ContinuationImpl.kt:30:39)
    at 13  test.kexe                           0x0000000110182d70 kfun:kotlinx.coroutines.DispatchedTask#run(){} + 2880 (/opt/buildAgent/work/44ec6e850d5c63f0/kotlinx-coroutines-core/common/src/internal/DispatchedTask.kt:106:71)
    at 14  test.kexe                           0x0000000110103709 kfun:kotlinx.coroutines.EventLoopImplBase#processNextEvent(){}kotlin.Long + 905 (/opt/buildAgent/work/44ec6e850d5c63f0/kotlinx-coroutines-core/common/src/EventLoop.common.kt:277:22)
    at 15  test.kexe                           0x00000001101a723b kfun:kotlinx.coroutines#runEventLoop(kotlinx.coroutines.EventLoop?;kotlin.Function0<kotlin.Boolean>){} + 843 (/opt/buildAgent/work/44ec6e850d5c63f0/kotlinx-coroutines-core/native/src/Builders.kt:80:40)
    at 16  test.kexe                           0x00000001101a8ede kfun:kotlinx.coroutines.BlockingCoroutine.joinBlocking#internal + 430 (/opt/buildAgent/work/44ec6e850d5c63f0/kotlinx-coroutines-core/native/src/Builders.kt:67:9)
    at 17  test.kexe                           0x00000001101a6936 kfun:kotlinx.coroutines#runBlocking(kotlin.coroutines.CoroutineContext;kotlin.coroutines.SuspendFunction1<kotlinx.coroutines.CoroutineScope,0:0>){0§<kotlin.Any?>}0:0 + 1286 (/opt/buildAgent/work/44ec6e850d5c63f0/kotlinx-coroutines-core/native/src/Builders.kt:50:22)
    at 18  test.kexe                           0x00000001101a6e1e kfun:kotlinx.coroutines#runBlocking$default(kotlin.coroutines.CoroutineContext?;kotlin.coroutines.SuspendFunction1<kotlinx.coroutines.CoroutineScope,0:0>;kotlin.Int){0§<kotlin.Any?>}0:0 + 350 (/opt/buildAgent/work/44ec6e850d5c63f0/kotlinx-coroutines-core/native/src/Builders.kt:33:15)
    at 19  test.kexe                           0x000000010fea8854 kfun:me.sphere.test.support#runTesting(kotlin.coroutines.SuspendFunction1<kotlinx.coroutines.CoroutineScope,kotlin.Unit>){} + 228 (/Users/anders/repos/ios/AppCore/appcore-test-utils/src/iosMain/kotlin/me/sphere/test/support/runTesting.kt:6:66)
    at 20  test.kexe                           0x000000010feadace kfun:me.sphere.appcore.utils.LoopTests#reprod(){} + 158 (/Users/anders/repos/ios/AppCore/appcore-utils/src/commonTest/kotlin/me/sphere/appcore/utils/LoopTests.kt:39:20)
    at 21  test.kexe                           0x000000010feb9a28 kfun:me.sphere.appcore.utils.$LoopTests$test$0.$reprod$FUNCTION_REFERENCE$14.invoke#internal + 72 (/Users/anders/repos/ios/AppCore/appcore-utils/src/commonTest/kotlin/me/sphere/appcore/utils/LoopTests.kt:39:5)
    at 22  test.kexe                           0x000000010feb9c61 kfun:me.sphere.appcore.utils.$LoopTests$test$0.$reprod$FUNCTION_REFERENCE$14.$<bridge-UNNN>invoke(-1:0){}#internal + 97 (/Users/anders/repos/ios/AppCore/appcore-utils/src/commonTest/kotlin/me/sphere/appcore/utils/LoopTests.kt:39:5)
    at 23  test.kexe                           0x000000010ff727ad kfun:kotlin.native.internal.test.BaseClassSuite.TestCase#run(){} + 1325 (/Users/teamcity1/teamcity_work/290aee0e088a1666/runtime/src/main/kotlin/kotlin/native/internal/test/TestSuite.kt:85:26)
    at 24  test.kexe                           0x000000010ff6a280 kfun:kotlin.native.internal.test.TestRunner.run#internal + 3584 (/Users/teamcity1/teamcity_work/290aee0e088a1666/runtime/src/main/kotlin/kotlin/native/internal/test/TestRunner.kt:245:30)
    at 25  test.kexe                           0x000000010ff6b81e kfun:kotlin.native.internal.test.TestRunner.runIteration#internal + 3054 (/Users/teamcity1/teamcity_work/290aee0e088a1666/runtime/src/main/kotlin/kotlin/native/internal/test/TestRunner.kt:271:55)
    at 26  test.kexe                           0x000000010ff6c16f kfun:kotlin.native.internal.test.TestRunner#run(){}kotlin.Int + 1007 (/Users/teamcity1/teamcity_work/290aee0e088a1666/runtime/src/main/kotlin/kotlin/native/internal/test/TestRunner.kt:286:17)
    at 27  test.kexe                           0x000000010ff5fb28 kfun:kotlin.native.internal.test#testLauncherEntryPoint(kotlin.Array<kotlin.String>){}kotlin.Int + 312 (/Users/teamcity1/teamcity_work/290aee0e088a1666/runtime/src/main/kotlin/kotlin/native/internal/test/Launcher.kt:22:53)
    at 28  test.kexe                           0x000000010ff5fc1c kfun:kotlin.native.internal.test#main(kotlin.Array<kotlin.String>){} + 60 (/Users/teamcity1/teamcity_work/290aee0e088a1666/runtime/src/main/kotlin/kotlin/native/internal/test/Launcher.kt:26:20)
    at 29  test.kexe                           0x000000010feba7f7 Konan_start + 167 (/Users/teamcity1/teamcity_work/290aee0e088a1666/runtime/src/main/kotlin/kotlin/native/internal/test/Launcher.kt:25:1)

[andersio]

The issue seems to be that the object is already frozen when the init process attempts to set TimeoutCoroutine::time. Perhaps related to superclasses' use of initParentJob, which is documented to freeze this?

kotlinx.coroutines/kotlinx-coroutines-core/common/src/Timeout.kt

Lines 151 to 154 in 28fb12c

	private class TimeoutCoroutine<U, in T: U>(
	@JvmField val time: Long,
	uCont: Continuation<U> // unintercepted continuation
	) : ScopeCoroutine<T>(uCont.context, uCont), Runnable {

[qwwdfsad]

Fixed in 1.5.0-native-mt