NPE in OperatorObserveOn RxJava 0.19

[niqo01]

One of my production user got the following NullPointerException:
Environment:

• rxjava-android: 0.19.0
• Android: 4.4.2
• Device: GT-I9505

java.lang.NullPointerException
       at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.pollQueue(OperatorObserveOn.java:135)
       at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.access$000(OperatorObserveOn.java:61)
       at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber$1.call(OperatorObserveOn.java:121)
       at rx.android.schedulers.HandlerThreadScheduler$InnerHandlerThreadScheduler$1.run(HandlerThreadScheduler.java:77)
       at android.os.Handler.handleCallback(Handler.java:733)
       at android.os.Handler.dispatchMessage(Handler.java:95)
       at android.os.Looper.loop(Looper.java:157)
       at android.app.ActivityThread.main(ActivityThread.java:5356)
       at java.lang.reflect.Method.invokeNative(Method.java)
       at java.lang.reflect.Method.invoke(Method.java:515)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
       at dalvik.system.NativeStart.main(NativeStart.java)

[niqo01]

I forgot the nice share Crashlytics feature: http://crashes.to/s/a5ab97ddcfc for complete details

[niqo01]

See #1354

[Bananeweizen]

You may want to comment on #1361, which should fix that issue.

[dpsm]

@niqo01 this should be fixed since 0.19.2. Do you still have the issue? @benjchristensen keep an eye on this issue since we might want to close once we confirm the issue is fixed.

[benjchristensen]

The observeOn operator is changed significantly in 0.20, so can anyone review and confirm whether this is still fixed in 0.20.0-RC3 or later?

[niqo01]

@dpsm I don't know how to reproduce myself, the only way I see is to deliver an update in production and wait and see our crash report tools. I ll update to 0.20, release and let you know if I see it again.

[benjchristensen]

pollQueue in observeOn has a null check and based on #1361 and then work in 0.20 I think this is fixed. Please open a new ticket if the issue returned in 0.20 somehow.