The bug
When you use "text":null
for command blocks and signs, an exception is thrown and in the worst case (falling_block
) the game crashes.
How to reproduce
/summon falling_block ~ ~5 ~ {Time:1,BlockState:{Name:"minecraft:oak_sign"},TileEntityData:{Text1:"{\"text\":null}"}}
Crash report
1.13.1: crash-2018-08-22_23.51.39-server.txt
Description: Ticking entity
java.lang.UnsupportedOperationException: JsonNull
at com.google.gson.JsonElement.getAsString(JsonElement.java:191)
at ij$a.a(SourceFile:215)
at ij$a.deserialize(SourceFile:174)
at com.google.gson.internal.bind.TreeTypeAdapter.read(TreeTypeAdapter.java:69)
at xj.a(SourceFile:497)
at xj.a(SourceFile:522)
at ij$a.a(SourceFile:369)
at bkb.b(SourceFile:56)
at amk.R_(SourceFile:178)
at axx.a(SourceFile:1243)
at td.a(SourceFile:575)
at axx.g(SourceFile:1218)
at axx.o_(SourceFile:1100)
at td.o_(SourceFile:491)
at net.minecraft.server.MinecraftServer.b(SourceFile:755)
at net.minecraft.server.MinecraftServer.a(SourceFile:681)
at dgg.a(SourceFile:131)
at net.minecraft.server.MinecraftServer.run(SourceFile:584)
at java.lang.Thread.run(Thread.java:745)
Linked issues
Attachments
Comments

Can confirm for 1.16.1, but crashes with a different error: