If you try to look at a block of fire placed in an item frame the game crashes with the attached crash report. The item frame doesn't need to be directly visible. Looking at the same direction will already crash the game.
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Fire is only accessible through mods.
No. You can use the /give command.
The ID is 51.
crash reports, I'm having the same issue. the item frame isnt visible from where i was.
The most technical Blocks like 51(Fire) 55(Redstone) or 52(Mob Spawner) won't render as Item.
I didn't even have to put it in an item frame. Just doing the command crashes the game in 13w02a.