better handling of unknown exceptions

src/main/java/carpet/mixins/Entity_horseFixMixin.java

@@ -0,0 +1,35 @@
+package carpet.mixins;
+
+import carpet.settings.CarpetSettings;
+import net.minecraft.client.network.packet.EntityPositionS2CPacket;
+import net.minecraft.entity.Entity;
+import net.minecraft.entity.mob.MobEntity;
+import net.minecraft.server.world.ServerWorld;
+import net.minecraft.world.World;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(Entity.class)
+public abstract class Entity_horseFixMixin
+{
+    @Shadow private Entity vehicle;
+
+    @Shadow public abstract World getEntityWorld();
+
+    @Inject(method = "stopRiding", at = @At("HEAD"))
+    private void resetNavigation(CallbackInfo ci)
+    {
+        if (vehicle != null && vehicle instanceof MobEntity && CarpetSettings.horseWanderingFix)
+        {
+            ((MobEntity) vehicle).getNavigation().stop();
+            if (!getEntityWorld().isClient)
+            {
+                ((ServerWorld) getEntityWorld()).method_14178().sendToNearbyPlayers((Entity)(Object)this, new EntityPositionS2CPacket(vehicle));
+            }
+        }
+    }
+
+}

src/main/java/carpet/settings/CarpetSettings.java

@@ -401,4 +401,11 @@ public class CarpetSettings
 
     @Rule(desc = "Spawning requires much less CPU and Memory", category = OPTIMIZATION)
     public static boolean lagFreeSpawning = false;
+
+    @Rule(
+            desc = "Prevents horses and other mobs to wander into the distance after dismounting",
+            extra = "Fixes issues with various Joergens wandering off and disappearing client-side",
+            category = BUGFIX
+    )
+    public static boolean horseWanderingFix = false;
 }