The bug
Anvils can be placed at a position certain blocks are already in, replacing them without dropping any item (exceptions: MC-40380).
See: http://youtu.be/8jv2ghTqxRE (ignore the item frame and painting part).
Affected blocks
Basically everything whose material is Material.CIRCUITS, see also orld.mayPlace(Block, BlockPos, boolean, EnumFacing, Entity) (MCP 9.40 names).
buttons
end_rod
flower_pot
ladder
lever
rails
redstone repeaters
redstone comparators
redstone_wire
skull
torch
tripwire
Related issues
is duplicated by
MC-1182
When an anvil falls on some objects, they disappear.
MC-1944
Anvil destroys Buttons when placed in the same block
MC-2496
Placing an anvil on same block as torch removes torch.
MC-3375
the dragon egg stransform into block falling
MC-3912
Anvil Bugs
MC-5668
Anvils will delete transparent items
MC-6527
Falling anvil destroying some items but not others
MC-6641
Anvil bug
MC-6950
Placing an anvil behind a torch (on the blockface the torch is held on) will make the torch disappear
MC-7976
Anvil Replaces Button
MC-9829
Anvils Damaged By Slabs
MC-14736
Anvil vs Button Bug
MC-27039
Buttons deleting
MC-32278
Anvil on Torch Placing Bug (Possibly other blocks too)
MC-44118
Losing items due to placing anvil
MC-52983
You can overwrite certain blocks by placing an anvil in the same space
MC-54704
Anvil Torch Bug
MC-55950
Placing anvil on the same block where a button is destroys the button
MC-58368
If you place an anvil on a block with a button, the anvil replaces the button.
MC-59111
Anvil and Torch bug
MC-71028
Anvil overrides blocks like redstone, torches, buttons
MC-73985
Redstone is deleted by anil
MC-85181
Anvils can replace end rods
MC-92845
Placing anvils on the same wall as torches deletes the torch
MC-106898
Placing anvil on block under a head deletes head.
MC-107373
Banner Destroys Anvil
MC-118683
Anvil and Torch/Redstone Torch/Lever/Button/Stone Button Problem
MC-118774
Placing Anvil On Block Behind Button Button Replaces Button
MC-120102
Place an anvil where a lever is and you can overrite it!
MC-126309
Replacing a placed Torch with Anvil
MC-130540
Bug with redstone dust and anvil.
MC-133654
Anvil can be placed in same block as button
MCL-3375
Anvil can destroy every semi-bloc (lever/torch ect...)
relates to
Comments
migrated
kumasasa
Confirmed. (The Item Frame will pop out with any other block too)
migrated
Confirmed.
trazlander
They did make it so that when falling anvils lands on any of those minor objects (torches, buttons, levers), it crushes and destroys them. I guess placing them on that block is similar to an anvil landing on that block, and you're just crushing that object by placing it there.
This might be working as intended.
migrated
Confirmed in 1.6.2.
migrated
Confirmed in 1.6.2, and even in 13w38c.
Ezekiel
Is this still a concern in the latest Minecraft version 14w08a? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.
migrated
Confirmed for 08a
migrated
Confirmed for 14w17a
migrated
Confirmed, It is possible to place an anvil in the same block as a button/lever/redstone torch/tall grass and a few others, the block is completely replaced by the anvil. MC Version: 14w18b
migrated
confirmed for 14w29b
Bentroen
Confirmed for the latest snapshots, pre-releases and 1.8.
rydian
Confirmed in 1.8.1-pre2.
http://gfycat.com/ObeseIllustriousAlbino
migrated
Confirmed in 1.8.1 pre-3.
rydian
Confirmed in 1.8.1-pre5.
marcono1234
Confirmed for 1.8.2-pre4
Cultist_O
This is still present in 15w32c
rydian
Still happening in 15w42a.
Bentroen
Confirmed for 15w44b.
rydian
Still happening in 15w46a, and a falling anvil that locks into the spot a torch is in will do the same thing.
rydian
Still happening in 15w47a.
migrated
Still in 16w06a but Paintings and Item Frames doesn't disapear
migrated
Confirmed for 1.9-pre1. Affects torches, levers, redstone torches, buttons (both), tripwire hooks, end rods and string.
rydian
Still happening in 1.9-pre2, still erasing items/blocks.
migrated
Can confirm for 1.9.1 Pre-3
migrated
Can confirmed for 1.9.4.
FaRo1
Confirmed for 1.10.
FaRo1
Confirmed for 1.10.1 for stone button, lever, torch, redstone dust, normal rail, end rod, tripwire hook, ladder and flower pot. Others are untested. But there certainly is no new general solution in this version.
[Mod]Les3awe
This issue has been fixed in 17w47a.
Nothing happening here when placing the anvil.