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Bug
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    Resolution: Cannot Reproduce
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P1: Critical
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    Qt 3D Studio 1.0
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    None
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    macOS 10.13.2
Windows 10 
- Create a new project
 - Add 3 more layers (so you have master and 3 non-master layers)
 - Add a different basic item to each layer
 - Go to Perspective View
 - Delete the layer which has the item that shows
 - Go back to Scene Camera View
 
-> Crash (if not at once, go to perspective view and delete another layer)
Reproducible ~50%