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  1. Minecraft: Java Edition
  2. MC-258203

/data modify thinks NBT is too large, but /data merge doesn't

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    • Confirmed
    • Commands

    Description

      The bug

      In some cases, a /data modify command will fail with the new "Resulting NBT too large" error, but an equivalent /data merge command will succeed.

      Unfortunately, as of yet I'm not able to work out the exact conditions for the discrepancy, but we do have a repro world!

      How to reproduce

      1. Download and open the attached world
      2. Run

      /data merge storage pandamium:temp {test:2}
      /data modify storage pandamium:temp test set value 3
      

      Expected result
      Both commands should succeed

      Actual result
      The second command fails with a "Resulting NBT too large" error

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              Unassigned Unassigned
              tryashtar [Mod] tryashtar
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              Dates

                Created:
                Updated:
                Resolved:
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