Hi everyone I am facing a strange error while I run the `nat

Question

Hi everyone I am facing a strange error while I run the `nativeTest` task in a multi platform project using coroutines `1 5 2 native mt` I use `runBlocking` around each of my tests This works correctly when I run each test independently one by one But when I run the whole test suite at the start of the second test I get `Uncaught Kotlin exception kotlin IllegalStateException Cannot execute task because event loop was shut down` full stack trace in thread Did anyone ever faced this

Didier Villevalois · Answer

The full stack trace

Didier Villevalois · Answer

```Uncaught Kotlin exception kotlin IllegalStateException Cannot execute task because event loop was shut down at kfun kotlin Throwable lt init gt kotlin String 0x41da0b at kfun kotlin Exception lt init gt kotlin String 0x417987 at kfun kotlin RuntimeException lt init gt kotlin String 0x417b07 at kfun kotlin IllegalStateException lt init gt kotlin String 0x417d77 at kfun kotlinx coroutines loopWasShutDown kotlin Nothing 0x5de646 at kfun kotlinx coroutines DefaultExecutor enqueue kotlinx coroutines Runnable 0x5de373 at kfun kotlinx coroutines EventLoopImplBase enqueue kotlinx coroutines Runnable 0x561d26 at kfun kotlinx coroutines EventLoopImplBase dispatch kotlin coroutines CoroutineContext kotlinx coroutines Runnable 0x561c43 at kfun kotlinx coroutines internal DispatchedContinuation resumeWith kotlin Result lt 1 0 gt 0x5b6f4e at kfun kotlinx coroutines resume at kotlinx coroutines CancellableContinuationImpl lt 0 0 gt kotlin coroutines Continuation lt 0 0 gt kotlin Boolean 0 lt kotlin Any gt 0x5ba30b at kfun kotlinx coroutines internal shareableResume$lambda 1 internal 0x5ebebe at kfun kotlinx coroutines internal $shareableResume$lambda 1$FUNCTION REFERENCE$67 invoke internal 0x5ec22d at kfun kotlinx coroutines internal $shareableResume$lambda 1$FUNCTION REFERENCE$67 $ lt bridge UNN gt invoke internal 0x5ec3bd at WorkerLaunchpad 0x44994f at ZN6Worker19processQueueElementEb 0x80f4a4 at ZN6Worker4parkElb 0x810add at kfun kotlin native concurrent Worker park kotlin Long kotlin Boolean kotlin Boolean 0x44ce96 at kfun kotlinx coroutines WorkerThread parkNanos kotlin Long 0x5e2dc8 at kfun kotlinx coroutines runEventLoop kotlinx coroutines EventLoop kotlin Function0 lt kotlin Boolean gt 0x5db635 at kfun kotlinx coroutines BlockingCoroutine joinBlocking internal 0x5dcabd at kfun kotlinx coroutines runBlocking kotlin coroutines CoroutineContext kotlin coroutines SuspendFunction1 lt kotlinx coroutines CoroutineScope 0 0 gt 0 lt kotlin Any gt 0 0 0x5dc092 at kfun org zeromq tests utils testSuspend kotlin coroutines CoroutineContext kotlin coroutines SuspendFunction1 lt kotlinx coroutines CoroutineScope kotlin Unit gt 0x72a686 at kfun org zeromq tests utils testSuspend$default kotlin coroutines CoroutineContext kotlin coroutines SuspendFunction1 lt kotlinx coroutines CoroutineScope kotlin Unit gt kotlin Int 0x72a7ce at kfun org zeromq tests utils testWithEngine org zeromq Engine kotlin coroutines SuspendFunction1 lt org zeromq tests utils TestContextBuilder kotlin Unit gt 0x725a23 at kfun org zeromq tests utils contextTests kotlin collections List lt kotlin String gt kotlin coroutines SuspendFunction1 lt org zeromq tests utils TestContextBuilder kotlin Unit gt 0x724665 at kfun org zeromq tests utils contextTests$default kotlin collections List lt kotlin String gt kotlin coroutines SuspendFunction1 lt org zeromq tests utils TestContextBuilder kotlin Unit gt kotlin Int 0x724f3e at kfun org zeromq tests sockets PubSubTests connectBindTest 0x72aa3c at kfun org zeromq tests sockets $PubSubTests$test$0 $connectBindTest$FUNCTION REFERENCE$1 invoke internal 0x73b675 at kfun org zeromq tests sockets $PubSubTests$test$0 $connectBindTest$FUNCTION REFERENCE$1 $ lt bridge UNNN gt invoke 1 0 internal 0x73b86b at kfun kotlin native internal test BaseClassSuite TestCase run 0x472c5c at kfun kotlin native internal test TestRunner run internal 0x46a0bb at kfun kotlin native internal test TestRunner runIteration internal 0x46c8ba at kfun kotlin native internal test TestRunner run 0x46da5b at kfun kotlin native internal test testLauncherEntryPoint kotlin Array lt kotlin String gt 0x45dece at kfun kotlin native internal test main kotlin Array lt kotlin String gt 0x45dd89 at Konan start 0x45dffd at Init and run start 0x7fd670 at libc start main 0x7f2d36d57b75 at 0x405d31 at nil kotlinx coroutines CompletionHandlerException Exception in completion handler ResumeOnCompletion e08588 job e0c3f8 for JobImpl Cancelled e0c3f8 at kfun kotlin Exception lt init gt kotlin String kotlin Throwable 0x417a15 at kfun kotlin RuntimeException lt init gt kotlin String kotlin Throwable 0x417b95 at kfun kotlinx coroutines CompletionHandlerException lt init gt kotlin String kotlin Throwable 0x5660d5 at kfun kotlinx coroutines JobSupport notifyCompletion internal 0x56dc76 at kfun kotlinx coroutines JobSupport completeStateFinalization internal 0x56c7b8 at kfun kotlinx coroutines JobSupport finalizeFinishingState internal 0x56a401 at kfun kotlinx coroutines JobSupport tryMakeCompletingSlowPath internal 0x576b91 at kfun kotlinx coroutines JobSupport tryMakeCompleting internal 0x5762d3 at kfun kotlinx coroutines JobSupport makeCompleting kotlin Any kotlin Boolean 0x5759f4 at kfun kotlinx coroutines JobImpl completeExceptionally kotlin Throwable kotlin Boolean 0x57f8ed at kfun io ktor utils io internal AwaitingSlot cancel kotlin Throwable 0x67ee2a at kfun io ktor utils io ByteChannelSequentialBase close kotlin Throwable kotlin Boolean 0x610159 at kfun io ktor utils io ByteChannelNative close kotlin Throwable kotlin Boolean 0x6844e5 at kfun io ktor utils io ByteChannelSequentialBase cancel kotlin Throwable kotlin Boolean 0x60fea4 at kfun io ktor utils io $launchChannel$lambda 0COROUTINE$160 invokeSuspend internal 0x619126 at kfun kotlin coroutines native internal BaseContinuationImpl resumeWith kotlin Result lt kotlin Any gt 0x43d0a0 at kfun kotlinx coroutines internal DispatchedContinuation resumeWith kotlin Result lt 1 0 gt 0x5b7187 at kfun kotlinx coroutines resume at kotlinx coroutines CancellableContinuationImpl lt 0 0 gt kotlin coroutines Continuation lt 0 0 gt kotlin Boolean 0 lt kotlin Any gt 0x5ba30b at kfun kotlinx coroutines internal shareableResume$lambda 1 internal 0x5ebebe at kfun kotlinx coroutines internal $shareableResume$lambda 1$FUNCTION REFERENCE$67 invoke internal 0x5ec22d at kfun kotlinx coroutines internal $shareableResume$lambda 1$FUNCTION REFERENCE$67 $ lt bridge UNN gt invoke internal 0x5ec3bd at WorkerLaunchpad 0x44994f at ZN6Worker19processQueueElementEb 0x80f4a4 at ZN6Worker4parkElb 0x810add at kfun kotlin native concurrent Worker park kotlin Long kotlin Boolean kotlin Boolean 0x44ce96 at kfun kotlinx coroutines WorkerThread parkNanos kotlin Long 0x5e2dc8 at kfun kotlinx coroutines runEventLoop kotlinx coroutines EventLoop kotlin Function0 lt kotlin Boolean gt 0x5db635 at kfun kotlinx coroutines BlockingCoroutine joinBlocking internal 0x5dcabd at kfun kotlinx coroutines runBlocking kotlin coroutines CoroutineContext kotlin coroutines SuspendFunction1 lt kotlinx coroutines CoroutineScope 0 0 gt 0 lt kotlin Any gt 0 0 0x5dc092 at kfun org zeromq tests utils testSuspend kotlin coroutines CoroutineContext kotlin coroutines SuspendFunction1 lt kotlinx coroutines CoroutineScope kotlin Unit gt 0x72a686 at kfun org zeromq tests utils testSuspend$default kotlin coroutines CoroutineContext kotlin coroutines SuspendFunction1 lt kotlinx coroutines CoroutineScope kotlin Unit gt kotlin Int 0x72a7ce at kfun org zeromq tests utils testWithEngine org zeromq Engine kotlin coroutines SuspendFunction1 lt org zeromq tests utils TestContextBuilder kotlin Unit gt 0x725a23 at kfun org zeromq tests utils contextTests kotlin collections List lt kotlin String gt kotlin coroutines SuspendFunction1 lt org zeromq tests utils TestContextBuilder kotlin Unit gt 0x724665 at kfun org zeromq tests utils contextTests$default kotlin collections List lt kotlin String gt kotlin coroutines SuspendFunction1 lt org zeromq tests utils TestContextBuilder kotlin Unit gt kotlin Int 0x724f3e at kfun org zeromq tests sockets PubSubTests connectBindTest 0x72aa3c at kfun org zeromq tests sockets $PubSubTests$test$0 $connectBindTest$FUNCTION REFERENCE$1 invoke internal 0x73b675 at kfun org zeromq tests sockets $PubSubTests$test$0 $connectBindTest$FUNCTION REFERENCE$1 $ lt bridge UNNN gt invoke 1 0 internal 0x73b86b at kfun kotlin native internal test BaseClassSuite TestCase run 0x472c5c at kfun kotlin native internal test TestRunner run internal 0x46a0bb at kfun kotlin native internal test TestRunner runIteration internal 0x46c8ba at kfun kotlin native internal test TestRunner run 0x46da5b at kfun kotlin native internal test testLauncherEntryPoint kotlin Array lt kotlin String gt 0x45dece at kfun kotlin native internal test main kotlin Array lt kotlin String gt 0x45dd89 at Konan start 0x45dffd at Init and run start 0x7fd670 at libc start main 0x7f2d36d57b75 at 0x405d31 at nil Caused by kotlin IllegalStateException Cannot execute task because event loop was shut down at kfun kotlin Throwable lt init gt kotlin String 0x41da0b at kfun kotlin Exception lt init gt kotlin String 0x417987 at kfun kotlin RuntimeException lt init gt kotlin String 0x417b07 at kfun kotlin IllegalStateException lt init gt kotlin String 0x417d77 at kfun kotlinx coroutines loopWasShutDown kotlin Nothing 0x5de646 at kfun kotlinx coroutines DefaultExecutor enqueue kotlinx coroutines Runnable 0x5de373 at kfun kotlinx coroutines EventLoopImplBase enqueue kotlinx coroutines Runnable 0x561d26 at kfun kotlinx coroutines EventLoopImplBase dispatch kotlin coroutines CoroutineContext kotlinx coroutines Runnable 0x561c43 at kfun kotlinx coroutines dispatch at kotlinx coroutines CancellableContinuationImpl lt 0 0 gt 0 lt kotlin Any gt 0x5b9892 at kfun kotlinx coroutines CancellableContinuationImpl dispatchResume internal 0x554bcd at kfun kotlinx coroutines CancellableContinuationImpl resumeImpl internal 0x5554af at kfun kotlinx coroutines CancellableContinuationImpl resumeImpl$default kotlin Any kotlin Int kotlin Function1 lt kotlin Throwable kotlin Unit gt kotlin Int 0x555782 at kfun kotlinx coroutines CancellableContinuationImpl resumeWith kotlin Result lt 1 0 gt 0x55396e at kfun kotlinx coroutines ResumeOnCompletion invoke internal 0x57e8b4 at kfun kotlinx coroutines JobSupport notifyCompletion internal 0x56da9e at kfun kotlinx coroutines JobSupport completeStateFinalization internal 0x56c7b8 and 43 more common stack frames skipped Uncaught Kotlin exception kotlin Throwable The process was terminated due to the unhandled exception thrown in the coroutine StandaloneCoroutine Cancelling e07918 Dispatchers Unconfined Exception in completion handler ResumeOnCompletion e1b068 job e06f58 for JobImpl Cancelled e06f58 at kfun kotlinx coroutines handleCoroutineExceptionImpl kotlin coroutines CoroutineContext kotlin Throwable 0x5deaad at kfun kotlinx coroutines handleCoroutineException kotlin coroutines CoroutineContext kotlin Throwable 0x55c480 at kfun kotlinx coroutines StandaloneCoroutine handleJobException internal 0x54d2a5 at kfun kotlinx coroutines JobSupport finalizeFinishingState internal 0x56a6e8 at kfun kotlinx coroutines JobSupport tryMakeCompletingSlowPath internal 0x576b91 at kfun kotlinx coroutines JobSupport tryMakeCompleting internal 0x5762d3 at kfun kotlinx coroutines JobSupport makeCompletingOnce kotlin Any kotlin Any 0x575d98 at kfun kotlinx coroutines AbstractCoroutine resumeWith kotlin Result lt 1 0 gt 0x54c454 at kfun kotlin coroutines native internal BaseContinuationImpl resumeWith kotlin Result lt kotlin Any gt 0x43d3b5 ```