[MC-135000] Crash when try to summon Wither boss

I tried to summon wither boss and get crash

It happend when i place the first wither skull on top of the soulsand

Linked issues

duplicates 1

MC-134967 NullPointerException when placing Wither Skeleton Skulls Resolved

Attachments

crash-2018-07-27_08.05.09-client.txt

Comments 2

[Bot] Arisa 2018-07-27T01:02:06Z

Please attach the crash report ([minecraft|http://hopper.minecraft.net/help/finding-minecraft-data-folder]/crash-reports/crash-<DATE>-client.txt), otherwise we can not diagnose this issue.
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Asteraoth 2018-07-27T01:06:13Z

Duplicate of MC-134967.