[MCPE-174872] Crash when changing item name in anvil

When you try to rename the game will crash

Follow these steps:

1. Start Minecraft

2. Create a world and enter the game

3. Get an anvil and an item

4. Put the anvil down then change the name => the game crashes

Linked issues

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We're tracking this issue in MCPE-174860, so this ticket is being resolved and linked as a duplicate.

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