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  1. Minecraft (Bedrock codebase)
  2. MCPE-163651

Comparators respond incorrectly to side + back input from redstone dust connected to a common power source

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    • Icon: Bug Bug
    • Resolution: Fixed
    • 1.19.70.22 Preview, 1.19.70
    • 1.19.40, 1.19.50.25 Preview, 1.19.41, 1.19.50, 1.19.51, 1.19.63
    • None
    • Confirmed
    • Multiple
    • 922512

      Steps to reproduce

      1. Place a comparator and a line/web of redstone dust that connects to the back and side inputs of the comparator, and a separate redstone dust line at its output.
      2. Place or activate a redstone power source in a position that makes the redstone power level at both comparator inputs be the same.
      3. Repeat this setup each direction and with the comparator in normal and subtract modes.
      4. Repeat the setup again but add a second comparator pointing the same direction but farther from the power source such that the redstone dust input at its back is at a higher level than the input at its side.

      Expected result

      The comparators always calculate the correct output.

      Observed result

      Half of the comparators calculate incorrect ouputs, and they go wrong in different ways depending on whether they are aligned with the X or Z axis.

      Subtract mode on comparators does not function when the main input and side input of the comparator are connected redstone, and when the comparator is facing east or west. The same is when it is not in subtract mode.

        1. Separate Inputs with Buffer.jpg
          1.19 MB
          Jaidan
        2. Separate Inputs (No Subtraction).jpg
          2.22 MB
          Jaidan
        3. Separate Inputs.jpg
          4.24 MB
          Jaidan
        4. Same Input with Buffer.jpg
          1.78 MB
          Jaidan
        5. Same Input.jpg
          2.59 MB
          Jaidan
        6. Minecraft 11_3_2022 12_46_19 AM-1.png
          690 kB
          eL_T
        7. Minecraft 10_26_2022 8_44_33 AM.png
          339 kB
          ArchThunder
        8. Minecraft 10_26_2022 8_44_23 AM.png
          369 kB
          ArchThunder
        9. Minecraft 10_26_2022 8_00_17 AM.png
          395 kB
          ArchThunder
        10. image-2022-12-06-10-07-25-683.png
          93 kB
          Aden Koperczak
        11. image-2022-12-06-10-07-03-910.png
          91 kB
          Aden Koperczak
        12. image-2022-10-26-19-12-36-061.png
          379 kB
          Ju_mao
        13. image_2022-10-25_215522934.png
          291 kB
          BatteryArc
        14. bug6.jpg
          780 kB
          WhiteCat_RS
        15. bug5.jpg
          822 kB
          WhiteCat_RS
        16. 68C6D440-6201-4E4D-A0B1-9FEA5B125666.jpeg
          572 kB
          [Mod] GoldenHelmet
        17. 130E9658-E3D9-401E-997F-34FCC0C8CE97.jpeg
          327 kB
          [Mod] GoldenHelmet

            BatteryArc BatteryArc
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              Created:
              Updated:
              Resolved:
              CHK: