MC-161559

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

The bug

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

How to reproduce

```
/gamemode survival
```

/item replace entity @s weapon.mainhand with minecraft:knowledge_book

Use the item
→ The following error message is printed.
```
Tag not valid: null
```

Status:Unresolved

Reporter:intsuc

Created:2019-09-21, 12:47 PM

Updated:2023-10-26, 06:58 PM

Votes:11

Watchers:5

Confirmation Status:Confirmed

Mojang Priority:Low

Category:Items, Player

Labels:knowledge_book

Affects Versions:

19w38b - 1.20.2

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

Fix Versions:-