[MC-15820] Villages and witch huts sometimes don't generate properly

I created some super flat worlds and most of the time I found the villages in these conditions. Attention! Sometimes not all the villages have this bug.

The bug has been working from the snapshot 13w19a. Follow those steps to reproduce it:

Create a world and join
As soon as you see a village, leave the game.
Quickly re-join the same world and the bug should work.

Linked issues

is cloned by 1

MC-125007 World fails to generate decorations on seemingly random quarter chunks Reopened

is duplicated by 25

MC-2961 Some villages are generating wrong for no reason Resolved

MC-4106 generating flat world bug Resolved

MC-9014 problems loading village in superflat Resolved

MC-9190 Strange village generation Resolved

MC-11267 Server World Generator Bug Resolved

20 more links

relates to 6

MC-84800 Reloading a world during terrain generation causes some parts of the world to be generated in stripped parts (snow, trees, etc.) Resolved

MC-5737 World generating in stripped parts Resolved

MC-7294 Structures can be generated with different parts at different height Resolved

MC-96998 End Cities / Woodland Mansions don't generate completely when interrupting generation Resolved

MC-125615 Some end cities don't generate completely Resolved

1 more links

Attachments

Comments 38

Tails 2013-05-17T15:12:16Z

Please provide seed, preset string and coordinates.

Christian Marcocci 2013-05-17T15:19:07Z

Now I only found these two seed with the bug.
Seed1:-8464678981462005138
x: -187
y: 4
z: -260
Seed2:-5599721526539106282
x: 1205
y: 4
z: -982
I'm sure there are other worlds in these conditions in fact I'm looking for more.

fake fakes 2013-05-17T15:46:32Z

Tried the seeds, neither worked. Are you sure you are playing vanilla Minecraft?

Christian Marcocci 2013-05-17T15:48:16Z

I'm playing Minecraft snapshot13w19a. Are you sure you are playing 13w19a?

Christian Marcocci 2013-05-17T15:53:01Z

I recreated the worlds mentioned in the description by placing the seed but the villages were normal. I decided to create other worlds without seed, and the bug has come back. I don't know what to say

28 more comments

Tails 2013-05-17T15:54:12Z

Unable to reproduce either. Created both worlds in 13w19a, both look normal, see screenshots.

Christian Marcocci 2013-05-17T19:46:24Z

I'm doing a video that will make you understand how to reproduce the bug.
http://www.youtube.com/watch?v=3yJ6gaO-hQc

Christian Marcocci 2013-05-17T21:32:40Z

This bug also affects other structures that are generated by the game

Tails 2013-05-17T21:50:01Z

Confirmed by following the steps using the Seed #1.

Tails 2013-05-17T22:08:23Z

Following the steps I was able to reproduce the occasional reports of MC-5737 still not beeing fixed. But these should be kept separated since they are reproduced differently.

Christian Marcocci 2013-05-17T22:47:37Z

I was able to reproduce the bug of the world that is generated in stripped parts. See screenshots

WolfieMario 2013-05-18T05:57:08Z

This may not be relevant, but confirmed for versions dating as far back as 1.3.2 - I've had the bug in the past, but figured it was just a one-time quirk. Yes, I re-loaded the world as I was flying around (inevitably generating chunks just as I reloaded), and the glitch was permanent (whereas MC-5737 is apparently client-side with unglitched server-side terrain?).

I even observed the chunks back then, curious as to why they hadn't populated - in MCedit, they were not marked for population, indicating that the game unmarked them without actually populating them. I've never heard of half-populated chunks, but the screenshots seem to contain doubly-populated chunks - it seems "unmark chunk for population" and "populate chunk" aren't atomic actions with regards to saving chunks, but "populate chunk" on its own is atomic with regards to chunk saving? I find it odd that both "accidentally leave unpopulated" and "accidentally populate twice" are possible, although that may not quite be what's happening in the screenshots.

ileon 2013-05-30T18:52:59Z

The game generate the village twice.

Ezekiel 2013-07-11T19:42:50Z

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

(Automatic Message)

Christian Marcocci 2013-07-12T16:05:57Z

This bug also works in version 1.6

Sciger 2014-01-13T01:44:14Z

This bug still exists as of 14w02c, I have a screenshot of a very long strip of missing generation in the middle of a forest, can provide it if needed.

Christian Marcocci 2014-05-17T23:20:21Z

I was unable to reproduce the bug of the villages in 1.7.9. I came back in 1.6.4 version and it still works. This bug was fixed in 1.7 i think, because it is the first release where the bug doesn't works, after the 1.6.4

Arjan de Vries 2014-05-22T07:04:23Z

This bug still works. Some chunks get generated differently (are corrupted) when strolling to a place when chunks are still busy loading. I am not getting stripes, but I do get some chunks not appearing as they are supposed to. For example iof I let a world load perfectly a certain mountain may have a bunch of coal in it, but when I stroll to the location before the chunk is generated perfectly, the mountain wall looks different, with far less coal, flowers placed in another way and ponds that are different.

johndrinkwater 2014-09-03T23:03:20Z

Seen this recently in 1.7.9 as we prepared our unpopulated chunks ready for the 1.8 update. Willing to share the map data if it’ll help devs look into this.

Jasper van den Berg 2014-09-21T20:19:31Z

Confirmed for 1.8

bob 2015-02-01T11:53:38Z

Can confirm for 1.8.1

bob 2015-02-01T11:54:22Z

Cant really reproduce because I ran into a new area then quit then logged on later and saw this bug.

KingSupernova 2015-02-01T12:58:34Z

If you saw the bug, then what do you mean "Can't really reproduce"?

bob 2015-02-01T15:05:40Z

Good point

Jasper van den Berg 2015-04-17T19:29:34Z

Confirmed for 1.8.3
Multiplayer