Hovering over an item crashed my game

Put the summary of the bug you're having here
I hovered over an item that had custom attributes and my game crashed.
What I expected to happen was...:
Describe what you thought should happen here
I should have been able to see the attributes and enchantments on the item and my game should not have crashed.
What actually happened was...:
Describe what happened here
My game grashed and I was given a crash report
Steps to Reproduce:
To reproduce create an item with custom attributes and enchantments.