Crash on Dispose

[slava-osipov-qs]

In some case NRE is occured in one of Tasks. I can't identify this task, but I suspect this task was created in IBluetoothLowEnergyAdapter.ConnectToDevice. Here is the stack trace from Android app:

at nexus.core.Observable`1[T].Dispose () [0x0002a] in <9343cfd36c97470fa9139cbdfa0c7ad4>:0 
  at _HA.Disconnect () [0x00135] in <e62d62d0f0784f209c7d249a3316efd5>:0 
  at _HA._sA (nexus.protocols.ble.ConnectionState ) [0x0007b] in <e62d62d0f0784f209c7d249a3316efd5>:0 
  at System.Runtime.CompilerServices.AsyncMethodBuilderCore+<>c.<ThrowAsync>b__6_1 (System.Object state) [0x00000] in <58604b4522f748968296166e317b04b4>:0 
  at System.Threading.QueueUserWorkItemCallback.WaitCallback_Context (System.Object state) [0x00007] in <58604b4522f748968296166e317b04b4>:0 
  at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00071] in <58604b4522f748968296166e317b04b4>:0 
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00000] in <58604b4522f748968296166e317b04b4>:0 
  at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00021] in <58604b4522f748968296166e317b04b4>:0 
  at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <58604b4522f748968296166e317b04b4>:0 
  at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <58604b4522f748968296166e317b04b4>:0

It looks like one of IObserver<>'s is null. I can suggest to validate arguments in all methods, especially in Observable<T>.Subscribe

[nexussays]

Cheers, thanks for the report!