(1.16 Pre-Release 3) [^crash-2020-06-10_18.21.22-server.txt]
Description: Exception while ticking
java.lang.NullPointerException: Exception while ticking
at bil.a(SourceFile:88)
at gy.a(SourceFile:23)
at gu.dispense(SourceFile:15)
at bxc.a(SourceFile:89)
at bxc.a(SourceFile:112)
at cfi$a.a(SourceFile:865)
at zd.b(SourceFile:596)
at zd$$Lambda$3895/290764432.accept(Unknown Source)
at bqn.b(SourceFile:84)
at zd.a(SourceFile:351)
at net.minecraft.server.MinecraftServer.b(SourceFile:873)
at net.minecraft.server.MinecraftServer.a(SourceFile:813)
at eox.a(SourceFile:93)
at net.minecraft.server.MinecraftServer.v(SourceFile:672)
at net.minecraft.server.MinecraftServer.a(SourceFile:256)
at net.minecraft.server.MinecraftServer$$Lambda$3883/2115162896.run(Unknown Source)
at java.lang.Thread.run(Thread.java:745)Linked issues
is duplicated by 11
MC-188484
Game crashes when dispensing a shulkerbox from a dispenser
Resolved
MC-188487
Game crash when dispenser fires a shulker box
Resolved
MC-188546
The game crashed whilst exception while ticking Error: java.lang.NullPointerException: Exception while ticking
Resolved
MC-188548
Game crashes when indirectly powered dispenser places shulker box
Resolved
MC-188577
Minecraft Server crashes while running Multi-Item Sorter
Resolved
Attachments
Comments 12
First time IT happend after piglin went throw portal to overworld. And then crash after crash. Maybe because there id a lot of redstone in the area
For me when I got back into the world after crashing the shulker was duplicated - it was placed and at the same time an identical shulker was still in the dispenser.
Before I write the rest of this comment, all mappings in here will be Yarn mappings.
I looked into the cause of this crash, and it seems to be that the dispenser is calling BlockItem#place to place the shulker box. In that call, there is a check for whether the player is in creative mode, to see whether the items in the player's inventory should be decremented. Of course, the dispenser is not a player and passes in a "fake" or null player to this method. This causes a NullPointerError. This can be solved simply with a check for whether the player instance is null within that "if" statement.
EDIT: Disregard that fix. After some testing, I realized this just turns the dispensers into item duplicators. Instead, either revert the code to what it was before or apply the above fix and add a extra check to see if the item is being placed by a dispenser.
There's a fabric mod by AMereBagatelle which fixes this if anyone's interested. [[1]|https://cdn.discordapp.com/attachments/507982666755473427/720439410856034344/emptytagfix-1.0.0.jar]
If you're in the Fabric Project Discord server, the source is here.
EDIT: Just update to pre4 lol
Please provide more information about what exactly you were doing at the time of the crash - also, check if it still crashes without some of the data packs.