Fatal Exception: java.lang.ClassCastException

[michal-chojnacki]

One of the devices I have a lot of crashes like that:

Fatal Exception: java.lang.ClassCastException
       at java.util.concurrent.atomic.AtomicReferenceFieldUpdater$AtomicReferenceFieldUpdaterImpl.targetCheck(AtomicReferenceFieldUpdater.java:244)
       at java.util.concurrent.atomic.AtomicReferenceFieldUpdater$AtomicReferenceFieldUpdaterImpl.get(AtomicReferenceFieldUpdater.java:293)
       at java.util.concurrent.atomic.AtomicReferenceFieldUpdater.getAndSet(AtomicReferenceFieldUpdater.java:151)
       at kotlinx.coroutines.scheduling.WorkQueue.poll(WorkQueue.kt:65)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.findTaskWithCpuPermit(CoroutineScheduler.kt:969)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.findTask$kotlinx_coroutines_core(CoroutineScheduler.kt:944)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:725)

What can be the reason and how can I avoid such situations?
Device Rockchip RK3368-Box
Android 6.0.1
Kotlin version 1.3.21
Coroutines version 1.1.1

[qwwdfsad]

It is very suspicious. It looks like #490, but it is not.
Can you reproduce this problem locally or using an emulator?

[michal-chojnacki]

I wasn't able to reproduce it. However problem disappeared. I found at the code that Job wasn't canceled for one ViewModel during onCleared. Maybe this was the reason of this issue.

[qwwdfsad]

Ok, then I am closing this issue.
Feel free to reopen it if you will have this issue again

[xudshen]

I got the same problem here, but I haven't reproduced it yet.

Fatal Exception: java.lang.ClassCastException
       at java.util.concurrent.atomic.AtomicReferenceFieldUpdater$AtomicReferenceFieldUpdaterImpl.throwAccessCheckException(AtomicReferenceFieldUpdater.java:388)
       at java.util.concurrent.atomic.AtomicReferenceFieldUpdater$AtomicReferenceFieldUpdaterImpl.accessCheck(AtomicReferenceFieldUpdater.java:379)
       at java.util.concurrent.atomic.AtomicReferenceFieldUpdater$AtomicReferenceFieldUpdaterImpl.getAndSet(AtomicReferenceFieldUpdater.java:442)
       at kotlinx.coroutines.c.o.b(WorkQueue.kt:65)
       at kotlinx.coroutines.c.a$b.p(CoroutineScheduler.kt:950)
       at kotlinx.coroutines.c.a$b.k(CoroutineScheduler.kt:928)

And this crash happens all among the devices.

Kotlin version 1.3.0
Coroutines version 1.0.0