When I stand on a solid block that has a water source block on top of it (=feet level) and a sign on top of the water source block (=eyes' level), I cannot always climb up on top of a block that has (or not) another water source block on top of it. It is difficult to describe it in one sentence so I uploaded a video on Youtube: http://youtu.be/NI98uWkYm1o and I uploaded here the two test worlds. Better description below.
I notice that it occurs differently in each of the four quadrants of the world but it is identical at different spots in the same quadrant.
Case 1, the player tries to escape from water to air/air (feet / eyes level):
If the player is in the first quadrant of the map (x>0 and z>0) direction doesn't matter, he can exit to all 4 cardinal directions.
If the player is in the second quadrant of the map (x>0 and z<0) it is impossible to exit to the south side.
If the player is in the third quadrant of the map (x<0 and z<0) it is impossible to exit to the south and east side.
If the player is in the forth quadrant of the map (x<0 and z>0) it is impossible to exit to the east side.
Case 2, the player tries to exit from water / air to water source block / air (feet / eyes level):
If the player is in the first quadrant of the map (x>0 and z>0) it is impossible to exit to the south and east side.
If the player is in the second quadrant of the map (x>0 and z<0) it is impossible to exit to the south north and east side.
If the player is in the third quadrant of the map (x<0 and z<0) it is impossible to exit to all four sides.
If the player is in the forth quadrant of the map (x<0 and z>0) it is impossible to exit to the south west and east side.
(There is a symmetry of behavior between the second and the forth quadrant.)
So this bug renders mob spawner farms impossible to work most of the time.
EDIT:
About the attached photos:
Lime wool means that the player can escape to that block.
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migrated
migrated
EDIT: This comment is about the new attachments:
Lime wool means that the player can escape to that block.
New world save uploaded.
migrated
Can a mod please mark this as confirmed. This report is exactly for the same bug as in MC-3510 just with extended description of the circumstances under which it occurs. MC-3510 was reported after this one here and instead of closing it as duplicate it gets confirmed while this one remains unconfirmed.
EDIT: Thank you very much!
kumasasa
Yessir!
migrated
This has been around forever, and has annoyed the hell out of me! lol
shufboyardee
Still goes on in 1.5.
Ezekiel
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.
migrated
still in 14w31a
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I'm not playing minecraft anymore so I don't keep track of the bugs I submitted but I checked this one and it is still affecting the game (1.7.10 and 14w31a).
galaxy_2alex
Is this still a concern in the current Minecraft version 1.8.1 Prerelease 3 / Launcher version 1.5.3 or later? 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
I didn't do 100% of the test cases, but quite a few of them are unchanged in 1.8.1-pre3
galaxy_2alex
Reopened, Thanks.
kumasasa
Is this still an issue in the current Minecraft Snapshot 15w49b or later? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.
shufboyardee
Just tested, it's all fixed, as of some 1.8 version.
pokechu22
NOT all fixed in 1.8.9.
All of the case 1 things are fixed in 1.8 (yay! those are the more annoying ones - the ones involving getting out of water). However, the case 2 ones are still present, albeit with a different configuration.
In any case involving trying to go from one water source block to another while facing east (+x) or south (+z), regardless of quadrant, the jump will fail.
To reproduce, build this thing:
[media]Note the direction I'm facing - south.
Then, get into the lower water, and try to swim to the upper water. It does not work. (This happens even if glowstone isn't used, BTW. I only did that to avoid ice).
I recommend changing the fix version for this ticket to 1.8. I can then create a ticket for the different version of this bug in 1.8.9.
migrated
We can't put older versions as fix version, sorry. Please do create a new ticket for your newly discovered/rediscovered flaws in 1.8.9 and make sure they also affect 16w02a.
pokechu22
Just tested it - the behavior I described is fixed in 16w02a (so I'm not going to bother creating another ticket since it's already fixed).
migrated
I am encountering this problem in the latest 1.13 pre-release (6).
Ray
cant hop up onto a block if in water of level 3 or lower.
pokechu22
This bug specifically was a directional one for negative coordinates. I think the issue you're having is MC-132632.