[MC-53915] Primed tnt glitching through blocks

What I expected to happen:
The primed TNT would stay within the enclosed/blocked off cannon and blow it up.

What happened:
The primed TNT was blasted out THROUGH the cobblestone and out of the cannon.

How to replicate:
Build cannon with steps shown below, fill the two dispensers which are facing each other with TNT, fill the one other dispenser with TNT minecarts, flip the lever until all the minecarts have been dispensed onto the rails within the device, push the button.

Evidence:
The video attached (poor quality), the same video in better quality: https://www.youtube.com/watch?v=_3YaQI2lQqE

Linked issues

is duplicated by 3

MC-68688 TNT Glitches into Blocks Resolved

MC-106149 TNT appears to pass through blocks when pushed by water current Resolved

MC-115412 TNT Glitch Resolved

relates to 2

MC-12730 TNT falls through fences and walls when ignited whilst on top of them Reopened

MC-119577 Primed TNT can appear to move into or through blocks Open

Attachments

final.wmv

Comments 21

Dlawso the Really Lucky Rabbit 2014-04-28T19:11:46Z

These screenshots don't show the bug that is described. It only shows the contraption that is used. Please use a screenshot that ACTUALLY SHOWS the bug being performed.

Chali Chaligha 2014-04-28T19:28:30Z

Now I have an image of the glitch taking place,

Dlawso the Really Lucky Rabbit 2014-04-28T19:34:02Z

I'm sorry, but the image that was posted doesn't clearly show the bug taking place, as the TNT just exploded. Please make a screenshot showing the bug taking place before the TNT explodes.

EDIT: Found the issue. For the other blocks, you're using a powered rail, a sign, a ladder, and water. The powered rail, sign, and ladder act as a block, but the water does not. Therefore, the primed TNT will glitch because those things act as a block.

This works as intended.

Chali Chaligha 2014-04-28T19:52:27Z

I believe there has been a misunderstanding, minecart tnt explodes, forcing primed tnt through a cobblestone block as shown in the video

Chali Chaligha 2014-04-28T19:58:53Z

I apologize for the poor quality of the video yet do not know how to improve it as the file plays perfectly on my computer yet not as an attachment here.

11 more comments

Chali Chaligha 2014-04-28T20:04:37Z

here is the URL for the youtube video which shows the footage with greater clarity : https://www.youtube.com/watch?v=_3YaQI2lQqE&hd=1

Dlawso the Really Lucky Rabbit 2014-04-28T20:35:11Z

Checked the video, and it appears that the cannon works perfectly fine.

Invalid.

Chali Chaligha 2014-04-28T20:39:45Z

That's the whole point!! It shouldn't, it is SEALED.

Dlawso the Really Lucky Rabbit 2014-04-28T20:48:30Z

Chali, I don't know what your talking about. All I said was that the cannon has no issues, and the primed TNT is supposed to "glitch" through the block due to it being fired by a cannon.

Intended/Invalid.

Chali Chaligha 2014-04-28T20:51:11Z

No, the point is, it is a glitch because the cannon is entirely encased in cobblestone yet the tnt still fires out of it

Chali Chaligha 2014-04-28T20:51:56Z

It being the cannon.

Joshua Bonacorsi 2014-04-29T17:06:31Z

Tested and confirmed.

I have tested this cannon in multiple versions and the problem only exists in Minecraft 14w17a.
I have also tested this cannon ussing different materials and they all have the same result.

BTW why is it so important that you can seal the cannon without the TNT phasing though?

Chali Chaligha 2014-04-29T17:21:40Z

It is important because the tnt takes longer to fly in an arc than straight, therefore when loading the cannon with a greater charge of tnt minecarts, the tnt is propelled in a larger arc which it can't complete before it explodes. If however the tnt cannot phase through blocks, then on the real version of the cannon with an open ended barrel, the tnt is forced straight out taking a shorter time to cover the same distance. Thus when adding a greater charge, the tnt can go further if it does not glitch through blocks. I have done this in the past and when loading 27 minecarts with tnt into it, the tnt shot out the barrel (two blocks above ground) and flew 257 blocks before exploding on the ground. On the other hand now that the tnt glitches through, the cannon's max range is under 100 blocks as the larges number of tnt minecarts you can load it with is around 11 before the tnt explodes in the air.

Joshua Bonacorsi 2014-04-29T17:40:01Z

Oh... Okay.
Thanks for letting me know.