title: Switch Google Maps SDK & Mapkit in the same app cause crash
body: <p>I created a pretty simple app that uses MapKit and GoogleMaps frameworks and tried to switch between the two maps. I am using ARC (ios 6.1) and Google Maps SDK for iOS version: 1.1.1.2311. After a couple of switches the app crashes with <code>[EAGLContext setCurrentContext:]</code> – always in the MapKit code. There was some suggestions in a previous thread - to try setting <code>[EAGLContext setCurrentContext:nil]</code> at various places but it doesn’t help.</p>
  
  <pre><code>stack trace:
  Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
  Exception Codes: KERN_INVALID_ADDRESS at 0x0000000c
  Crashed Thread:  0
  
  Thread 0 name:  Dispatch queue: com.apple.main-thread
  Thread 0 Crashed:
  0   OpenGLES                        0x33beeb12 +[EAGLContext setCurrentContext:] + 74
  1   VectorKit                       0x383cada4 -[VGLGPU setPaused:] + 120
  2   VectorKit                       0x383bad70 -[VKMainLoop updateLinkState] + 492
  3   VectorKit                       0x383c7334 -[VKAnimation startWithStepHandler:completionHandler:] + 112
  4   VectorKit                       0x383d657a -[VKBuildingFootprintMapModel _reloadStyleAnimated:] + 474
  5   VectorKit                       0x383d6398 -[VKBuildingFootprintMapModel setActive:] + 84
  6   VectorKit                       0x383d5ef4 -[VKModelObject setSupermodel:] + 44
  7   VectorKit                       0x383d624a -[VKModelObject insertSubmodel:atIndex:] + 142
  8   VectorKit                       0x383d615a -[VKMapRasterizer addSubmodel:] + 322
  9   VectorKit                       0x383d5cb4 -[VKMapModel addSubmodel:] + 136
  10  VectorKit                       0x383cf1c4 -[VKMapModel forceMapType:] + 1532
  11  VectorKit                       0x383cc568 -[VKMapModel initWithTransform:shouldRasterize:] + 2016
  12  VectorKit                       0x383cbd80 -[VKMapModel initShouldRasterize:] + 36
  13  VectorKit                       0x383c9678 -[VKMapCanvas initWithFrame:shouldRasterize:] + 356
  14  VectorKit                       0x383c930e -[VKMapView initWithFrame:andGlobe:shouldRasterize:] + 642
  15  MapKit                          0x33599320 -[MKMapView _commonInitAndEnableLoading:fromIB:] + 720
  16  MapKit                          0x33598e9c -[MKMapView initWithFrame:] + 252
  17  saTest                          0x00017e2a -[AppleMapCtl loadView] (AppleMapCtl.m:27)
  </code></pre>