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  1. Minecraft (Bedrock codebase)
  2. MCPE-30514

Certain Piston-to-Piston Interactions Result in a Crash

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    • Icon: Bug Bug
    • Resolution: Fixed
    • 1.5.3
    • 1.2.10.1
    • None
    • Confirmed
    • Windows
    • 92581

      Verification builds:

      1.2.10 Beta

      Summary:

      Certain interactions where a piston pushes another piston (directly or indirectly) result in a crash. They mostly seem to involve observers powering the pistons to trigger said crash. Sticky and normal pistons both result in crashes.

      Steps to Reproduce:

      Sample A - Replace the quartz block with an observer such that it powers the adjacent piston.
      Sample B - Remove one or both of the obsidian blocks holding down the flying machine, then update one of the far end observers on the left or right.
      Sample C - Update the observer on the left.
      Sample D - Update the observer on the right.

      Observed Results:

      The observer updates the piston, which begins to extend, then the game crashes.

      Expected Results:

      The piston extends as normal, pushing any other piston/observer, piston/slimeblock, and piston/piston combinations as normal.

      Screenshots/Videos attached:

      Yes

      Notes:

      I noticed that this seems to trigger a crash only when the first piston is initially powered by a short pulse (i.e. observer). Needs more testing.

        1. Sample A.png
          Sample A.png
          116 kB
        2. Sample B.png
          Sample B.png
          188 kB
        3. Sample C.png
          Sample C.png
          259 kB
        4. Sample D.png
          Sample D.png
          172 kB

            Mistahtokyo MaladjustedPlatypus
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              Created:
              Updated:
              Resolved:
              CHK: