Crash error when using /mmob spawn model3 and colliding vehicle with blocks

[XXY233]

When using /mmob spawn model3 and driving the spawned vehicle entity into blocks (e.g. walls), the server throws multiple warnings and stack traces related to entity damage handling.

[22:19:22 WARN]: java.lang.IllegalArgumentException: Health value (20.031993865966797) must be between 0 and 20.0. (attribute base value: 20.0)
[22:19:22 WARN]:        at com.google.common.base.Preconditions.checkArgument(Preconditions.java:483)
[22:19:22 WARN]:        at org.bukkit.craftbukkit.entity.CraftLivingEntity.setHealth(CraftLivingEntity.java:131)
[22:19:22 WARN]:        at Magic-11.2.3.jar//com.elmakers.mine.bukkit.utility.platform.base_v26_1.CompatibilityUtilsBase.damage(CompatibilityUtilsBase.java:375)
[22:19:22 WARN]:        at Magic-11.2.3.jar//com.elmakers.mine.bukkit.action.builtin.RideEntityAction.crash(RideEntityAction.java:676)
[22:19:22 WARN]:        at Magic-11.2.3.jar//com.elmakers.mine.bukkit.action.builtin.RideEntityAction.perform(RideEntityAction.java:299)
[22:19:22 WARN]:        at Magic-11.2.3.jar//com.elmakers.mine.bukkit.action.ActionContext.perform(ActionContext.java:43)
[22:19:22 WARN]:        at Magic-11.2.3.jar//com.elmakers.mine.bukkit.action.ActionHandler.perform(ActionHandler.java:221)
[22:19:22 WARN]:        at Magic-11.2.3.jar//com.elmakers.mine.bukkit.batch.ActionBatch.process(ActionBatch.java:38)
[22:19:22 WARN]:        at Magic-11.2.3.jar//com.elmakers.mine.bukkit.magic.Mage.processPendingBatches(Mage.java:2034)
[22:19:22 WARN]:        at Magic-11.2.3.jar//com.elmakers.mine.bukkit.magic.MagicController.processPendingBatches(MagicController.java:1623)
[22:19:22 WARN]:        at Magic-11.2.3.jar//com.elmakers.mine.bukkit.tasks.BatchUpdateTask.run(BatchUpdateTask.java:14)
[22:19:22 WARN]:        at org.bukkit.craftbukkit.scheduler.CraftTask.run(CraftTask.java:78)
[22:19:22 WARN]:        at org.bukkit.craftbukkit.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:474)
[22:19:22 WARN]:        at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1793)
[22:19:22 WARN]:        at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1646)
[22:19:22 WARN]:        at net.minecraft.server.dedicated.DedicatedServer.tickServer(DedicatedServer.java:444)
[22:19:22 WARN]:        at net.minecraft.server.MinecraftServer.processPacketsAndTick(MinecraftServer.java:1704)
[22:19:22 WARN]:        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1374)
[22:19:22 WARN]:        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:304)
[22:19:22 WARN]:        at java.base/java.lang.Thread.run(Thread.java:1474)
[22:19:46 WARN]: java.lang.IllegalArgumentException: Direct entity must be set if causing entity is set
[22:19:46 WARN]:        at org.bukkit.craftbukkit.damage.CraftDamageSourceBuilder.build(CraftDamageSourceBuilder.java:45)
[22:19:46 WARN]:        at Magic-11.2.3.jar//com.elmakers.mine.bukkit.utility.platform.base_v26_1.CompatibilityUtilsBase.damage(CompatibilityUtilsBase.java:371)
[22:19:46 WARN]:        at Magic-11.2.3.jar//com.elmakers.mine.bukkit.action.builtin.RideEntityAction.crash(RideEntityAction.java:676)
[22:19:46 WARN]:        at Magic-11.2.3.jar//com.elmakers.mine.bukkit.action.builtin.RideEntityAction.perform(RideEntityAction.java:299)
[22:19:46 WARN]:        at Magic-11.2.3.jar//com.elmakers.mine.bukkit.action.ActionContext.perform(ActionContext.java:43)
[22:19:46 WARN]:        at Magic-11.2.3.jar//com.elmakers.mine.bukkit.action.ActionHandler.perform(ActionHandler.java:221)
[22:19:46 WARN]:        at Magic-11.2.3.jar//com.elmakers.mine.bukkit.batch.ActionBatch.process(ActionBatch.java:38)
[22:19:46 WARN]:        at Magic-11.2.3.jar//com.elmakers.mine.bukkit.magic.Mage.processPendingBatches(Mage.java:2034)
[22:19:46 WARN]:        at Magic-11.2.3.jar//com.elmakers.mine.bukkit.magic.MagicController.processPendingBatches(MagicController.java:1623)
[22:19:46 WARN]:        at Magic-11.2.3.jar//com.elmakers.mine.bukkit.tasks.BatchUpdateTask.run(BatchUpdateTask.java:14)
[22:19:46 WARN]:        at org.bukkit.craftbukkit.scheduler.CraftTask.run(CraftTask.java:78)
[22:19:46 WARN]:        at org.bukkit.craftbukkit.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:474)
[22:19:46 WARN]:        at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1793)
[22:19:46 WARN]:        at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1646)
[22:19:46 WARN]:        at net.minecraft.server.dedicated.DedicatedServer.tickServer(DedicatedServer.java:444)
[22:19:46 WARN]:        at net.minecraft.server.MinecraftServer.processPacketsAndTick(MinecraftServer.java:1704)
[22:19:46 WARN]:        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1374)
[22:19:46 WARN]:        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:304)
[22:19:46 WARN]:        at java.base/java.lang.Thread.run(Thread.java:1474)

[NathanWolf]

Strangely this would imply it's dealing negative damage ... not sure how that would happen.

[XXY233]

Hi! Actually, the main issue I wanted to report is the java.lang.IllegalArgumentException: Direct entity must be set if causing entity is set exception.

I'm not sure why the negative damage happens either. It seems to occur at the same time, but it's much harder to reproduce.

From my testing, both exceptions occur when the vehicle is almost destroyed (only a tiny amount of health remaining) and then crashes into a wall. However, the negative damage exception is inconsistent and doesn't happen every time.

The Direct entity must be set if causing entity is set exception, on the other hand, is very easy to reproduce. Just reduce the vehicle's health until it's almost dead, then drive it into a wall, and the exception occurs consistently.

Also, I noticed that in my report yesterday I accidentally lost the blank line before the second exception, which made it look like there was only one stack trace. I've edited the report and restored the line break, so the two exceptions are now clearly separated. 😵

[NathanWolf]

oh.. haha, well I guess if you crash while driving backwards it might apply negative damage 🤦

I just released 11.2.4 with a fix. I'll upload a new dev build, too.

I think that should fix both of these issues.

I did this a while ago but never clicked the comment button ...

[XXY233]

Thanks for the quick fix!

I tested again with 11.2.4, and unfortunately I'm still getting the Direct entity must be set if causing entity is set exception.

I've uploaded the complete log here: https://mclo.gs/cn0qCri

I've also attached a video showing how to reproduce it.

2026-07-17.14-03-48.mp4