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MC-75022

Failed jump is tolerated/Impossible movements possible

Steps to reproduce & Justification:
  1. Player jumps, activates pressure plate and safely lands on the lamp.

  2. If the player activates pressure plate, it means that the position of the player is lower than half block.

  3. If the player landed on lamp block, it means that the position of the player is same or higher than a half block.

  4. Step two and step three cannot happen at the same time but in the step one they are.

Note: It is possible to reproduce this with lot of different block location/player movement, but I fint provided example most simple and easy. It might be caused by slight desync between server and client.

Demonstration Video

Linked issues

Comments 18

I can also confirm. Also, that's weird.

Still happens in 1.9

Just a warning to anyone looking at this, don't be thrown by the video's confusion about snow heights. The bug itself is still legitimate.

(to those unaware: 1 layer of snow has 0 height, 2 layers has 1/8 height, 4 layers has 3/8 height, etc)

8 more comments

Can confirm in 21w06a.

Can confirm in 21w07a.

Can confirm in 21w11a.

Can confirm in 21w17a.

Can confirm in 1.19.

yut951121

(Unassigned)

Confirmed

Networking

desync, impossible, jump, paradox, parkour, position

Minecraft 1.8.1, Minecraft 1.8.2-pre4, Minecraft 1.8.2-pre6, Minecraft 1.8.2, Minecraft 1.8.3, ..., 21w11a, 21w17a, 1.19, 1.19.3, 1.20.3 Release Candidate 1

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