I m having some issues using `asCompletableFuture` It seems

Question

I m having some issues using `asCompletableFuture` It seems to hang if my coroutine throws an exception ``` class CompletableFutureTest Test fun testFailAsCompletableFuture val executeJob = async fail Test failed predictably val future = executeJob asCompletableFuture println asCompletableFuture future get println Execute job completed ``` I get this stacktrace in the log ``` Exception in thread ForkJoinPool commonPool worker 1 coroutine 1 kotlinx coroutines experimental CompletionHandlerException Exception in completion handler InvokeOnCompletion InvokeOnCompletion 377acc75 for coroutine 1 DeferredCoroutine CompletedExceptionally 685fc50a at kotlinx coroutines experimental JobSupport completeUpdateState JobSupport kt 226 at kotlinx coroutines experimental JobSupport updateState JobSupport kt 157 at kotlinx coroutines experimental JobSupport makeCompletingInternal JobSupport kt 568 at kotlinx coroutines experimental JobSupport makeCompletingOnce$kotlinx coroutines core JobSupport kt 552 at kotlinx coroutines experimental AbstractCoroutine resumeWithException AbstractCoroutine kt 110 at kotlin coroutines experimental jvm internal CoroutineImpl resume CoroutineImpl kt 41 at kotlinx coroutines experimental DispatchedTask$DefaultImpls run Dispatched kt 150 at kotlinx coroutines experimental DispatchedContinuation run Dispatched kt 14 at java util concurrent ForkJoinTask$RunnableExecuteAction exec ForkJoinTask java 1402 at java util concurrent ForkJoinTask doExec ForkJoinTask java 289 at java util concurrent ForkJoinPool$WorkQueue runTask ForkJoinPool java 1056 at java util concurrent ForkJoinPool runWorker ForkJoinPool java 1692 at java util concurrent ForkJoinWorkerThread run ForkJoinWorkerThread java 157 Caused by java lang AssertionError Test failed predictably at org junit Assert fail Assert java 88 at kotlin test junit JUnitAsserter fail JUnitSupport kt 56 at kotlin test AssertionsKt AssertionsKt fail Assertions kt 89 at kotlin test AssertionsKt fail Unknown Source at completable future test CompletableFutureTest$testFailAsCompletableFuture$executeJob$1 doResume CompletableFutureTest kt 14 at kotlin coroutines experimental jvm internal CoroutineImpl resume CoroutineImpl kt 42 7 more ```

Vsevolod Tolstopyatov [JB] · Answer

It looks like a bug <https github com Kotlin kotlinx coroutines issues 469>

Jonathan Walsh · Answer

thanks