java.lang.ClassCastException: at kotlinx.coroutines.CoroutineDispatcher.releaseInterceptedContinuation (CoroutineDispatcher.kt:108)

[dcampogiani]

Hi, after upgrading to Kotlin 1.5 and related dependencies we are getting this error:

kotlinx.coroutines.CoroutinesInternalError: 
  at kotlinx.coroutines.DispatchedTask.handleFatalException (DispatchedTask.kt:144)
  at kotlinx.coroutines.DispatchedTask.run (DispatchedTask.kt:115)
  at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely (CoroutineScheduler.kt:571)
  at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask (CoroutineScheduler.kt:750)
  at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker (CoroutineScheduler.kt:678)
  at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run (CoroutineScheduler.kt:665)
Caused by: java.lang.ClassCastException: 
  at kotlinx.coroutines.CoroutineDispatcher.releaseInterceptedContinuation (CoroutineDispatcher.kt:108)
  at kotlin.coroutines.jvm.internal.ContinuationImpl.releaseIntercepted (ContinuationImpl.kt:118)
  at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith (ContinuationImpl.kt:39)
  at kotlinx.coroutines.DispatchedTask.run (DispatchedTask.kt:106)
  at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely (CoroutineScheduler.kt:571)
  at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask (CoroutineScheduler.kt:750)
  at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker (CoroutineScheduler.kt:678)
  at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run (CoroutineScheduler.kt:665)

From our crash reporting tool I'm also getting additional info, here some examples:

Fatal Exception: x0.a.h0
Fatal exception in coroutines machinery for CancellableContinuation(DispatchedContinuation[Dispatchers.IO, Continuation at kotlinx.coroutines.channels.AbstractChannel.receiveCatching-JP2dKIU(AbstractChannel.kt:632)@f58ec7]){Completed}@ef89cf4. Please read KDoc to 'handleFatalException' method and report this incident to maintainers

Fatal Exception: x0.a.h0
Fatal exception in coroutines machinery for CancellableContinuation(DispatchedContinuation[Dispatchers.Default, Continuation at com.dropbox.flow.multicast.StoreRealActor$1.invokeSuspend(StoreRealActor.kt:42)@bde904b]){Completed}@1f640e6. Please read KDoc to 'handleFatalException' method and report this incident to maintainers

We've updated the following dependencies altogether to be compliant with Kotlin 1.5:

• org.jetbrains.kotlinx:kotlinx-coroutines-core:1.5.0
• org.jetbrains.kotlinx:kotlinx-coroutines-android:1.5.0
• org.jetbrains.kotlinx:kotlinx-coroutines-rx2:1.5.0
• org.jetbrains.kotlinx:kotlinx-coroutines-test:1.5.0
• org.jetbrains.kotlin:kotlin-reflect:1.5.10
• org.jetbrains.kotlin:kotlin-allopen:1.5.10
• org.jetbrains.kotlin:kotlin-gradle-plugin:1.5.10
• org.jetbrains.kotlin:kotlin-serialization:1.5.10
• org.jetbrains.kotlinx:kotlinx-metadata-jvm:0.3.0
• org.jetbrains.kotlinx:kotlinx-serialization-core:1.2.1
• org.jetbrains.kotlinx:kotlinx-serialization-cbor:1.2.1
• org.jetbrains.kotlinx:kotlinx-serialization-json:1.2.1
• com.dropbox.mobile.store:store4:4.0.2-KT15

We are not able to provide a code example because we can't find any reference to our code in the stack trace, I'll update this issue if we will be able to isolate the crash.

How can we fix this issue?
Thanks

[dkhalanskyjb]

Possibly related to #2736, an issue that is already fixed in the develop branch but not in master.

[yandroidUA]

Update to Kotlin 1.5.21 fix this issue for me

[qwwdfsad]

Fixed in coroutines 1.5.1