Hovering with the mouse over an enchanted item causes a crash if the id contains capital letters
/give @p minecraft:diamond_sword{Enchantments:[{id:"Cookie",lvl:1}]}
Description: Rendering screen
i: Non [a-z0-9/._-] character in path of location: minecraft:Cookie
at ok.<init>(SourceFile:36)
at ok.<init>(SourceFile:41)
at awn.a(SourceFile:582)
at cmd.a(SourceFile:99)
at cmd.a(SourceFile:95)
at cnh.a(SourceFile:674)
at cmy.b(SourceFile:177)
at cnh.a(SourceFile:631)
at cvw.a(SourceFile:821)
at cim.c(SourceFile:820)
at cim.a(SourceFile:381)
at net.minecraft.client.main.Main.main(SourceFile:144)
Linked issues
is duplicated by 2
relates to 1
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Comments 2


Still an issue in 1.13-pre2. The mouse-over case apparently has been fixed, but you can still get it to crash for example if you use a axe to chop down a tree.
Run
/give @p minecraft:diamond_axe{Enchantments:[{id:"Cookie",lvl:1}]}
Chop down a tree
→
Maybe related to MC-124123