[MC-2591] Walking over the corner of lava deals damage

The bug

Sometimes, when you walk over the corner of a pool of lava, it will deal a heart of damage to you.

How to reproduce:

Lay out a ring of blocks with a 2x2 lava hole in the middle
Stand exactly in the middle on the outer edge of one side of the ring
Angle your camera to exactly the middle of the inner edge of the ring on either side left or right
Move in a straight line forwards while in survival mode (notice you will not "fall" down, but still take damage)

For a more exact setup, use a command block with the following command:

tp @p ~-1.5 ~0.5 ~0.5 -153.3 36.0

[media]

Linked issues

is duplicated by 1

MC-157663 If you stand on the edge of any not full block with lava aside you will burn even if lava level low Resolved

relates to 2

MC-1133 Whether or not a player experiences some effect is calculated based on the block under the center of the player Resolved

MC-163143 Standing near the edge of honey blocks in lava deals damage Resolved

Attachments

Comments 26

Anon Ymus 2012-11-24T17:03:15Z

Is there soulsand at the corner?

Tails 2012-12-26T02:27:55Z

Confirmed in 1.4.6 and reproducible with any kind of block. As seen in the screenshot standing at this angle and walking forward will damage you without falling into lava.

Rafael Ristovski 2013-04-25T12:45:07Z

I think this was a feature added when the particles coming off of lava and the plopping sound were added.

CubeTheThird 2013-09-26T03:06:39Z

Is this still a concern in the current Minecraft version 1.6.4 / Launcher version 1.2.5 ? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.

Hartspoon 2014-03-03T15:54:14Z

Still a concern in 14w08a.

16 more comments

Michael Wobst 2015-10-31T20:15:35Z

I tried really hard to reproduce it, but wasnt able to. Probably should be closing this issue considering its last update time.

Michael Wobst 2016-02-02T21:03:48Z

Tried to reproduce it once again with 16w04a this time, and wasn't able to reproduce it this time, too.
Can someone else confirm this being fixed?

CubeTheThird 2016-02-02T21:11:55Z

Was able to reproduce it in 16w04a

null 2016-06-23T16:40:05Z

Cannot reproduce in 1.10.2. However, you can get burnt when there is soul sand in the corner

kumasasa 2016-06-23T21:12:22Z

Isn't this duplicating MC-1133 ?

Anon Ymus 2016-06-24T14:07:13Z

I think only related because simply walking over lava shouldn't damage you.

FaRo1 2016-06-29T01:56:49Z

I think the reason why this happens is the same as why you can sprint over a gap of one block length: If you are behind the top half of a block, you go up on it (like on slabs or from slab to block). This also happens while falling. If you sprint over a one block wide gap, you don't fall enough to be under that 0,5 blocks mark, so you go up again. The same probably happens here: You can go down enough to be in the lava, but high enough to go up again. The real bug is that you don't get the usual 300+2x ticks of fire (in this case 300 or 302) afterwards.

null 2016-08-10T17:43:59Z

To reproduce, you must sprint over the corner of the lava at the right angle; you will not fall in but take half a heart of damage.

FaRo1 2016-08-21T18:13:47Z

Command for reproduction: teleport @p ~-.5 ~.5 ~.3 45 in a command block, one block further to negative X and positive Z lava, all four blocks around the lava is a solid block.

muzikbike 2018-07-07T10:22:24Z

Affects 1.13-pre6