Way to reproduce:
1) Name any item using an anvil and take it out of it.
2) Put it back in the anvil
3) Delete all the characters in its name
4) Press backspace one more time
5) Game has crashed (at least for me)
Linked issues
is duplicated by 5
MC-106917
Adding enchants to items via anvil and naming said items at the same time causes crash
Resolved
MC-107007
Hopper: java.lang.NullPointerException: Updating screen events
Resolved
MC-107052
Ctrl-Backspace CTD
Resolved
MC-107062
Hitting backspace in the anvil naming field when empty causes the game to crash
Resolved
MC-107126
I wanted to put protection 2 on a diamond chestplate in an anvil and I also wanted to rename it. When I deleted most all the letters except d, it just crashed.
Resolved
The game also crashes when attempting to delete an empty name when combining two items in an anvil.
It seems the only anvil interaction in which this doesn't crash the game is when renaming a previously unnamed item.