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  1. Minecraft: Java Edition
  2. MC-161559

"Tag not valid: null" when a knowledge book is used

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • None
    • 19w38b, 19w42a, 19w45b, 1.15 Pre-release 5, 1.15.2, 20w06a, 20w07a, 20w08a, 20w09a, 20w10a, 20w11a, 20w12a, 20w14a, 20w16a, 20w17a, 20w18a, 20w20b, 1.16 Pre-release 5, 1.16.1, 1.16.2 Pre-release 1, 1.16.2, 1.16.3, 1.16.4 Pre-release 1, 1.16.4, 20w45a, 20w46a, 20w48a, 20w51a, 21w03a, 1.16.5, 1.17.1, 21w37a, 1.18.1, 1.18.2, 1.19, 1.19.1, 1.19.2, 22w42a, 1.20.2
    • Confirmed
    • Items, Player
    • Low
    • Platform

      The bug

      When a player uses a knowledge book without Recipes, an error message is printed.

      How to reproduce

      1. /gamemode survival
      1. /item replace entity @s weapon.mainhand with minecraft:knowledge_book
      1. Use the item
        →  The following error message is printed. 
        Tag not valid: null

        1. MC-161559.png
          MC-161559.png
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            Unassigned Unassigned
            intsuc intsuc
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              Created:
              Updated:
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