API MISUSE after disposing observeValueUpdateAndSetNotification

[David2XN]

Describe the bug

Following error occurs in Xcode Output after disposing disposable from observeValueUpdateAndSetNotification() when bluetooth is Off:

2019-03-14 15:56:18.536575+0100 test[286:5547] [CoreBluetooth] API MISUSE: <CBPeripheral: 0x282835040, identifier = FCADF30F-882E-3766-212A-81915268838D, name = pL*****, state = disconnected> can only accept commands while in the connected state
2019-03-14 15:56:18.536898+0100 test[286:5547] [CoreBluetooth] API MISUSE: <CBCentralManager: 0x280c407c0> can only accept this command while in the powered on state

To Reproduce
Steps to reproduce the behavior:

1. Connect to BLE device
2. Discover services and Characteristics
3. Call observeValueUpdateAndSetNotification(), subscribe to it and store its disposable (observeDisposable)
4. Turn Off Bluetooth in Control Center
5. observeDisposable?.dispose() = Dispose disposable from observeValueUpdateAndSetNotification() (performed in .observeConnection().filter{ !$0 })

Expected behavior
No Errors in XCode Output

Environment:

• Device: iPhone SE
• OS: 12.1.4 (build 16D57)
• Library version: 5.1.4
• Swift version: 4.2.1

[minixT]

Fixed in version 5.2.0