[SEVERE] Could not pass event ItemInfoEvent to ChestShop v3.50t0040
org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427)
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
at com.Acrobot.ChestShop.ChestShop.callEvent(ChestShop.java:274)
at com.Acrobot.ChestShop.Commands.ItemInfo.onCommand(ItemInfo.java:45)
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:186)
at org.bukkit.craftbukkit.v1_4_6.CraftServer.dispatchCommand(CraftServer.java:554)
at net.minecraft.server.v1_4_6.PlayerConnection.handleCommand(PlayerConnection.java:990)
at net.minecraft.server.v1_4_6.PlayerConnection.chat(PlayerConnection.java:908)
at net.minecraft.server.v1_4_6.PlayerConnection.a(PlayerConnection.java:852)
at net.minecraft.server.v1_4_6.Packet3Chat.handle(Packet3Chat.java:44)
at net.minecraft.server.v1_4_6.NetworkManager.b(NetworkManager.java:290)
at net.minecraft.server.v1_4_6.PlayerConnection.d(PlayerConnection.java:112)
at net.minecraft.server.v1_4_6.ServerConnection.b(SourceFile:39)
at net.minecraft.server.v1_4_6.DedicatedServerConnection.b(SourceFile:30)
at net.minecraft.server.v1_4_6.MinecraftServer.r(MinecraftServer.java:585)
at net.minecraft.server.v1_4_6.DedicatedServer.r(DedicatedServer.java:224)
at net.minecraft.server.v1_4_6.MinecraftServer.q(MinecraftServer.java:481)
at net.minecraft.server.v1_4_6.MinecraftServer.run(MinecraftServer.java:416)
at net.minecraft.server.v1_4_6.ThreadServerApplication.run(SourceFile:849)
Caused by: java.lang.IllegalArgumentException: Instant potions cannot be extended
at org.apache.commons.lang.Validate.isTrue(Validate.java:157)
at org.bukkit.potion.Potion.setHasExtendedDuration(Potion.java:246)
at org.bukkit.potion.Potion.extend(Potion.java:130)
at org.bukkit.potion.Potion.fromDamage(Potion.java:380)
at org.bukkit.potion.Potion.fromItemStack(Potion.java:389)
at com.Acrobot.ChestShop.Listeners.ItemInfoListener.addPotionInfo(ItemInfoListener.java:44)
at sun.reflect.GeneratedMethodAccessor592.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)