[MC-33465] spawner spawns stone, if there is no data for the item id

a spawner with the nbt data as seen in the first picture spawns the item stone, where there is no data of stone. a spawner with the data of the second picture spawns also stone, but it clearly has the data for spawning stone, so it does what it should. the fact that the spawner with not enough data spawns also stone is a bug

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kumasasa 2013-10-03T07:26:30Z

Please recreate that with a spawner created by setblock

josh la 2013-10-03T15:57:02Z

setblock ~ ~ ~5 52 0 destroy {EntityId:"Item"}
this does create a spawner wich has a block of stone spinning in it, but it wont spawn any stone, i dont know why, but as i looked at the data for that spawner, it has even less data in it...
as for the oicture, it does not have the spawnpotentials and not the spawndata tag. but the problem i described above all this, still occurs in 13w39b

Anon Ymus 2013-10-05T13:17:29Z

Stone is the first block (id 1), so it is a feature that Minecraft doesn't just crash when it tries to render an incomplete entity. Minecraft also can't spawn the entity because it is missing data tags.