[tests] CBCentralManagerTest failing on macOS #7108
Description
Somehow a CoreBluetooth test is failing like this:
18:32:34.5113490 ***** CBCentralManagerTest
18:32:34.5121340 ***** Constructors
18:32:34.5161670 ***** RetrievePeripherals
18:32:34.5185270 2019-09-24 18:32:34.518 xammac_tests[71702:138096085]
18:32:34.5185730 Unhandled Exception:
18:32:34.5185900 ObjCRuntime.RuntimeException: Failed to marshal the Objective-C object 0x7ff62ff227f0 (type: MonoTouchFixtures_CoreBluetooth_CBCentralManagerTest_ManagerDelegate). Could not find an existing managed instance for this object, nor was it possible to create a new managed instance (because the type 'MonoTouchFixtures.CoreBluetooth.CBCentralManagerTest+ManagerDelegate' does not have a constructor that takes one IntPtr argument).
18:32:34.5186050 Additional information:
18:32:34.5186190 Selector: centralManagerDidUpdateState:
18:32:34.5186330 Method: MonoTouchFixtures.CoreBluetooth.CBCentralManagerTest/ManagerDelegate:UpdatedState (CoreBluetooth.CBCentralManager)
18:32:34.5186450
18:32:34.5187120 [ERROR] FATAL UNHANDLED EXCEPTION: ObjCRuntime.RuntimeException: Failed to marshal the Objective-C object 0x7ff62ff227f0 (type: MonoTouchFixtures_CoreBluetooth_CBCentralManagerTest_ManagerDelegate). Could not find an existing managed instance for this object, nor was it possible to create a new managed instance (because the type 'MonoTouchFixtures.CoreBluetooth.CBCentralManagerTest+ManagerDelegate' does not have a constructor that takes one IntPtr argument).
18:32:34.5187310 Additional information:
18:32:34.5187450 Selector: centralManagerDidUpdateState:
18:32:34.5187580 Method: MonoTouchFixtures.CoreBluetooth.CBCentralManagerTest/ManagerDelegate:UpdatedState (CoreBluetooth.CBCentralManager)
18:32:34.5187710
18:32:34.7760270 Test run failed.
Supposedly the TearDown happens because Asserts are raised and the CBCentralManager object is released too quickly.
However I couldn't not reproduce that locally (changing the values of various timeouts).