mod：Wyrmroost-1.16.3-1.2.10.jar
create-mc1.16.3_v0.3c.jar
In 1.16.4,the bug made my game crash unexpectedly：
WIth Wyrmroost, I ride a dragon, and in some unexpected circumstances, it will make my game crash.
I guess the dragon was rewritten with the code of the Minecart.
If you see it, please test it. Thank you

Here is the log：
// Hey, that tickles! Hehehe!

Time: 21-1-10 11:23
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
at com.simibubi.create.content.contraptions.components.structureMovement.train.capability.CapabilityMinecartController.tick(CapabilityMinecartController.java:105) ~[?:mc1.16.3_v0.3c] {re:classloading}
at com.simibubi.create.events.ClientEvents.onTick(ClientEvents.java:84) ~[?:mc1.16.3_v0.3c] {re:classloading}
at net.minecraftforge.eventbus.ASMEventHandler_85_ClientEvents_onTick_ClientTickEvent.invoke(.dynamic) ~[?:?] {}
at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:85) ~[eventbus-3.0.5-service.jar:?] {}
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:297) ~[eventbus-3.0.5-service.jar:?] {}
at net.minecraftforge.fml.hooks.BasicEventHooks.onPostClientTick(BasicEventHooks.java:110) ~[?:?] {re:classloading}
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1542) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.func_195542_b(Minecraft.java:953) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:607) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
at net.minecraft.client.main.Main.main(Main.java:184) ~[1.16.4.jar:?] {re:classloading,pl:runtimedistcleaner:A}
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_181] {}
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_181] {}
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_181] {}
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_181] {}
at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:51) ~[forge-1.16.4-35.1.36.jar:35.1] {}
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.6.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.6.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.6.jar:?] {}
at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.6.jar:?] {}
at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.6.jar:?] {}

A detailed walkthrough of the error, its code path and all known details is as follows:

I foundI found the relevant statement in the code.
Create/src/main/java/com/simibubi/create/content/contraptions/components/structureMovement/train/capability/CapabilityMinecartController.java
[

minecraft-exported-logs-2021-01-10T23-23-57.log

](url)
modlist.zip

Same problem here, mainly occurs when walking through an Immersive Portals nether portal (direction doesn't matter, though it doesn't happen every time)

I just got the exact same error riding a horse

Time: 10/01/21 2:03 PM
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
at com.simibubi.create.content.contraptions.components.structureMovement.train.capability.CapabilityMinecartController.tick(CapabilityMinecartController.java:105) ~[create:mc1.16.3_v0.3c] {re:classloading}
at com.simibubi.create.events.ClientEvents.onTick(ClientEvents.java:84) ~[create:mc1.16.3_v0.3c] {re:classloading}
at net.minecraftforge.eventbus.ASMEventHandler_1117_ClientEvents_onTick_ClientTickEvent.invoke(.dynamic) ~[?:?] {}
at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:85) ~[eventbus-3.0.5-service.jar:?] {}
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:297) ~[eventbus-3.0.5-service.jar:?] {}
at net.minecraftforge.fml.hooks.BasicEventHooks.onPostClientTick(BasicEventHooks.java:110) ~[forge:?] {re:classloading}
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1542) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,xf:fml:randompatches:RandomPatches Minecraft Transformer,pl:mixin:APP:assets/botania/botania.mixins.json:AccessorMinecraft,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.func_195542_b(Minecraft.java:953) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,xf:fml:randompatches:RandomPatches Minecraft Transformer,pl:mixin:APP:assets/botania/botania.mixins.json:AccessorMinecraft,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:607) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,xf:fml:randompatches:RandomPatches Minecraft Transformer,pl:mixin:APP:assets/botania/botania.mixins.json:AccessorMinecraft,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.main.Main.main(Main.java:184) ~[minecraft-1.16.4-client.jar:?] {re:classloading,pl:runtimedistcleaner:A}
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_271] {}
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_271] {}
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_271] {}
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_271] {}
at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:51) ~[forge-1.16.4-35.1.13-launcher.jar:35.1] {}
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.6.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.6.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.6.jar:?] {}
at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.6.jar:?] {re:classloading}
at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.6.jar:?] {re:classloading}
at io.github.zekerzhayard.forgewrapper.installer.Main.main(Main.java:50) [ForgeWrapper-1.4.2.jar:?] {}
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_271] {}
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_271] {}
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_271] {}
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_271] {}
at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:196) [NewLaunch.jar:?] {}
at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:231) [NewLaunch.jar:?] {}
at org.multimc.EntryPoint.listen(EntryPoint.java:143) [NewLaunch.jar:?] {}
at org.multimc.EntryPoint.main(EntryPoint.java:34) [NewLaunch.jar:?] {}

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --
Thread: Render thread
Stacktrace:
at com.simibubi.create.content.contraptions.components.structureMovement.train.capability.CapabilityMinecartController.tick(CapabilityMinecartController.java:105) ~[create:mc1.16.3_v0.3c] {re:classloading}
at com.simibubi.create.events.ClientEvents.onTick(ClientEvents.java:84) ~[create:mc1.16.3_v0.3c] {re:classloading}
at net.minecraftforge.eventbus.ASMEventHandler_1117_ClientEvents_onTick_ClientTickEvent.invoke(.dynamic) ~[?:?] {}
at net.minecraftforge.eventbus.ASMEventHandler.invoke(ASMEventHandler.java:85) ~[eventbus-3.0.5-service.jar:?] {}
at net.minecraftforge.eventbus.EventBus.post(EventBus.java:297) ~[eventbus-3.0.5-service.jar:?] {}
at net.minecraftforge.fml.hooks.BasicEventHooks.onPostClientTick(BasicEventHooks.java:110) ~[forge:?] {re:classloading}
-- Affected level --
Details:
All players: 1 total; [ClientPlayerEntity['TheoAramis'/15757, l='ClientLevel', x=6790.24, y=70.78, z=3086.52]]
Chunk stats: Client Chunk Cache: 1089, 743
Level dimension: minecraft:overworld
Level spawn location: World: (6933,112,3172), Chunk: (at 5,7,4 in 433,198; contains blocks 6928,0,3168 to 6943,255,3183), Region: (13,6; contains chunks 416,192 to 447,223, blocks 6656,0,3072 to 7167,255,3583)
Level time: 15256025 game time, 3256575 day time
Server brand: forge
Server type: Non-integrated multiplayer server
Stacktrace:
at net.minecraft.client.world.ClientWorld.func_72914_a(ClientWorld.java:447) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,xf:fml:xaeroworldmap:xaero_wm_clientworldclass,xf:fml:xaerominimap:xaero_clientworldclass,pl:mixin:APP:abnormals_core.mixins.json:client.ClientWorldMixin,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2024) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,xf:fml:randompatches:RandomPatches Minecraft Transformer,pl:mixin:APP:assets/botania/botania.mixins.json:AccessorMinecraft,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:628) ~[?:?] {re:mixin,pl:accesstransformer:B,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,xf:fml:randompatches:RandomPatches Minecraft Transformer,pl:mixin:APP:assets/botania/botania.mixins.json:AccessorMinecraft,pl:mixin:A,pl:runtimedistcleaner:A}
at net.minecraft.client.main.Main.main(Main.java:184) ~[minecraft-1.16.4-client.jar:?] {re:classloading,pl:runtimedistcleaner:A}
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_271] {}
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_271] {}
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_271] {}
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_271] {}
at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:51) ~[forge-1.16.4-35.1.13-launcher.jar:35.1] {}
at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.6.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.6.jar:?] {}
at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.6.jar:?] {}
at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.6.jar:?] {re:classloading}
at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.6.jar:?] {re:classloading}
at io.github.zekerzhayard.forgewrapper.installer.Main.main(Main.java:50) [ForgeWrapper-1.4.2.jar:?] {}
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_271] {}
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_271] {}
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_271] {}
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_271] {}
at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:196) [NewLaunch.jar:?] {}
at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:231) [NewLaunch.jar:?] {}
at org.multimc.EntryPoint.listen(EntryPoint.java:143) [NewLaunch.jar:?] {}
at org.multimc.EntryPoint.main(EntryPoint.java:34) [NewLaunch.jar:?] {}

This was addressed in 0.3e, feel free to re-open if its still an issue. Cheers~