Created a Wither Skeleton Spawn with the following command:
/setblock 150 -200 8 mob_spawner 0 replace {EntityId:Skeleton,SpawnData:{SkeletonType:1}}
Immediately afterwards, the game crashes for anyone who loads that chunk. I have attached the crash report.
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Comments 2
Malformed command, See the comments in MC-43567
Cannot confirm in 1.7.9 or 14w18b, see screenshots.