To reproduce:
1. Open project
2. Play/stop scene multiple times using CTRL+P until editor will crash (easiest to reproduce on 2017.1.0.a3)

Expected: editor will not crash when scene is played/stopped multiple times
Reproduced on: 5.5.0f3, 5.5.2p1, 5.6.0b10, 2017.1.0a3
Not reproduced on: 5.4 because of compiling errors

Note: if scene is played/stopped only by using mouse, editor will not crash

Not reproducible on OSX

========== OUTPUTING STACK TRACE ==================

0x00007FFAAB2B8FB5 (Leap) Leap::InteractionBox::toCString
0x00007FFAAB28790A (Leap) Leap::Controller::~Controller
0x00007FFAAB28FE36 (Leap) Leap::Controller::now
0x0000000021857394 (Mono JIT Code) (wrapper managed-to-native) Leap.LeapPINVOKE:delete_Controller (System.Runtime.InteropServices.HandleRef)
0x0000000021857033 (Mono JIT Code) Leap.Controller:Dispose ()
0x0000000021856CE1 (Mono JIT Code) Leap.Controller:Finalize ()
0x0000000000C91B58 (Mono JIT Code) (wrapper runtime-invoke) object:runtime_invoke_virtual_void__this__ (object,intptr,intptr,intptr)
0x00007FFAA9967FDC (mono) [c:\buildslave\mono\build\mono\metadata\gc.c:223] mono_gc_run_finalize
0x00007FFAA9A8B39A (mono) [c:\buildslave\mono\build\libgc\finalize.c:789] GC_invoke_finalizers
0x00007FFAA9968311 (mono) [c:\buildslave\mono\build\mono\metadata\gc.c:1056] finalizer_thread
0x00007FFAA99D34E3 (mono) [c:\buildslave\mono\build\mono\metadata\threads.c:685] start_wrapper
0x00007FFAA9A883DD (mono) [c:\buildslave\mono\build\libgc\win32_threads.c:599] thread_start
0x00007FFACBCC8364 (KERNEL32) BaseThreadInitThunk
0x00007FFACE1F70D1 (ntdll) RtlUserThreadStart

========== END OF STACKTRACE ===========