So basically I was messing around with commands in a world and I tried constantly teleporting the player to a phantom and I also wanted the player to be under the phantom so it looked like the phantom was carrying the player. So I did:
/execute as @e[type=phantom] at @s run execute as @a[distance=..1.5] at @s run tp @s @e[type=phantom,limit=1,distance=..2]
/execute as @e[type=phantom] at @s run execute as @a[distance=..1.5] at @s run tp @s ~ ~-1 ~
After I did these two commands and activated them I was teleporting to the phantom but then the world crashed with "Entity has invalid rotation" and when I tried logging in again I keep crashing.
I cared a lot about the world as I had a lot of command contraptions I've been working on for a long time.
(21w03a) [^crash-2021-01-26_16.57.49-server.txt]
---- Minecraft Crash Report ----
// This doesn't make any sense!
Time: 26/01/21 16:57
Description: Loading entity NBT
java.lang.IllegalStateException: Entity has invalid rotation
at aqu.g(SourceFile:1681)
at adk.a(SourceFile:337)
at adk.a(SourceFile:134)
at abp.c(SourceFile:113)
at abp.b(SourceFile:65)
at nu.a(SourceFile:235)
at abm.c(SourceFile:173)
at net.minecraft.server.MinecraftServer.b(SourceFile:881)
at net.minecraft.server.MinecraftServer.a(SourceFile:810)
at eue.a(SourceFile:93)
at net.minecraft.server.MinecraftServer.w(SourceFile:669)
at net.minecraft.server.MinecraftServer.a(SourceFile:257)
at net.minecraft.server.MinecraftServer$$Lambda$4463/390486284.run(Unknown Source)
at java.lang.Thread.run(Thread.java:745)
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- Head --
Thread: Server thread
Stacktrace:
at aqu.g(SourceFile:1681)
-- Entity being loaded --
Details:
Entity Type: minecraft:player (aaw)
Entity ID: 120
Entity Name: JarethTheRad
Entity's Exact location: 17.28, 70.29, 215.81
Entity's Block location: World: (17,70,215), Section: (at 1,6,7 in 1,4,13; chunk contains blocks 16,0,208 to 31,255,223), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Entity's Momentum: 0.04, -0.08, -0.07
Entity's Passengers: []
Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
at aqu.g(SourceFile:1681)
at adk.a(SourceFile:337)
at adk.a(SourceFile:134)
at abp.c(SourceFile:113)
at abp.b(SourceFile:65)
at nu.a(SourceFile:235)
at abm.c(SourceFile:173)
at net.minecraft.server.MinecraftServer.b(SourceFile:881)
at net.minecraft.server.MinecraftServer.a(SourceFile:810)
at eue.a(SourceFile:93)
at net.minecraft.server.MinecraftServer.w(SourceFile:669)
at net.minecraft.server.MinecraftServer.a(SourceFile:257)
at net.minecraft.server.MinecraftServer$$Lambda$4463/390486284.run(Unknown Source)
at java.lang.Thread.run(Thread.java:745)
-- System Details --
Details:
Minecraft Version: 21w03a
Minecraft Version ID: 21w03a
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 1224585664 bytes (1167 MB) / 2013265920 bytes (1920 MB) up to 2147483648 bytes (2048 MB)
CPUs: 2
JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
Player Count: 0 / 8; []
Data Packs: vanilla
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.
Please provide the full crash log from the crash-reports folder.