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  1. Minecraft: Java Edition
  2. MC-132762

Observed signal strength observer abnormality


    • Icon: Bug Bug
    • Resolution: Fixed
    • Minecraft 1.13.1-pre1
    • Minecraft 1.13-pre6, Minecraft 1.13-pre7
    • None
    • Unconfirmed

      The output frequency of redstone dust connected observers differs depending on the signal strength observed by the first observer.

      The below is a 2-clock circuit, which two observers mimic when the first of them observes redstone dust with signal strength 2, 4, 6-8, or 10-15. However when the first observer observes redstone dust with signal strength 1, 3, 5, or 9, since 1.13-pre4 the second observer instead erratically produces 3-tick pulses with 1-tick delay (see lower stripe of redstone repeaters in the images below).

      Original, pre-edit description

      The circuit below used to drop items from the dropper at a steady rate until it was empty, but since v1.13-pre4 the drop rate is significantly higher when the comparator output signal strength is 1 (i.e. when the dropper inventory contains fewer than 42 items). The drop rate thus changes when the inventory count drops from 42 to 41.

      The issue is non-directional and could seem to pertain to the timings of the two observers:

      1. The issue goes away when removing the observer pointing into the dropper.
      2. The 2-clock signal (...11001100...) produced by the non-dropper-pointing observer remains unchanged as observed by a line of connected 1-tick repeaters.

      More generally it appears that the abnormality occurs when the non-dropper-pointing observer observes a 1-strength signal, cause if we move it one block further away from the comparator, the behavior instead shows when the output signal strength is 2:


        1. Example.gif
          3.61 MB
        2. Strength=1.png
          142 kB
        3. Strength=15.png
          141 kB
        4. Strength=1 problem.png
          Strength=1 problem.png
          45 kB
        5. Strength=2 problem.png
          Strength=2 problem.png
          89 kB
        6. Strength=3.png
          142 kB
        7. Strength=5.png
          143 kB
        8. Strength=9.png
          144 kB

            Unassigned Unassigned
            Nergalic Philip Børgesen
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