Reproduction steps:
1. Open the attached project.
2. Play the 'SampleScene' or build it for iOS device.

Actual behavior:
- Editor will freeze.
- iOS application will crash

...
frame #0: 0x000000010274d1b8 metaltest`::ProduceClone() [inlined] GetType at BaseObject.h:248 [opt]
frame #1: 0x000000010274d1b8 metaltest`::ProduceClone() at CloneObject.cpp:35 [opt]
frame #2: 0x000000010274c534 metaltest`::CollectAndProduceGameObjectHierarchy() [inlined] CollectAndProduceGameObject at CloneObject.cpp:69 [opt]
frame #3: 0x000000010274c520 metaltest`::CollectAndProduceGameObjectHierarchy() at CloneObject.cpp:121 [opt]
frame #4: 0x000000010274c18c metaltest`::CollectAndProduceClonedIsland() at CloneObject.cpp:209 [opt]
frame #5: 0x000000010274c8c0 metaltest`::CloneObjectImpl() at CloneObject.cpp:282 [opt]
...

Reproduced with:
Metal
iOS, Editor
2018.3.0a1, 2018.2.0b4, 2018.1.1f1, 2017.4.3f1

Not reproducible with:
2017.2.2p4
or
OpenGL

Note:
Full callstack attached in the edit.