java.lang.NullPointerException for event(:player_inventory)

[MangelMaxime]

Hi,

I would like to use the following event :player_inventory but when I tried to load my plugin using this event with the following code :

class InventoryManagement
    include Purugin::Plugin
    description 'Inventory Management', 0.1

    def on_enable
        puts 'Hello inventory'
        event(:player_inventory) do |e|
            puts 'hi'
        end
    end

    def on_disbale
        puts 'Bye inventory'
    end

end

I get a java NullPointException on the line 7 which is the following :

event(:player_inventory) do |e| 

Here is the full trace :

Error occurred (in the plugin loader) while enabling Inventory Management v0.1 (Is it up to date?)
java.lang.NullPointerException
    at org.bukkit.plugin.java.JavaPluginLoader.createRegisteredListeners(org/bukkit/plugin/java/JavaPluginLoader.java:404) ~[craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at org.purugin.RubyPluginLoader.createRegisteredListeners(org/purugin/RubyPluginLoader.java:66) ~[?:?]
    at org.bukkit.plugin.SimplePluginManager.registerEvents(org/bukkit/plugin/SimplePluginManager.java:506) ~[craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at java.lang.reflect.Method.invoke(java/lang/reflect/Method.java:606) ~[?:1.7.0_51]
    at RUBY.event(file:/Volumes/Data/Developpement/Minecraft/bukkit/purugin/plugins/purugin-0.7.1-bukkit-1.7.2-R0.2.jar!/purugin/event.rb:212) ~[?:?]
    at RUBY.on_enable(/Volumes/Data/Developpement/Minecraft/bukkit/purugin/plugins/InventoryManagement.rb:7) ~[?:?]
    at RUBY.onEnable(file:/Volumes/Data/Developpement/Minecraft/bukkit/purugin/plugins/purugin-0.7.1-bukkit-1.7.2-R0.2.jar!/purugin/plugin.rb:142) ~[?:?]
    at InventoryManagement_1469695719.onEnable(InventoryManagement_1469695719.gen:13) ~[?:?]
    at InventoryManagement_1469695719.onEnable(InventoryManagement_1469695719.gen:13) ~[?:?]
    at org.purugin.RubyPluginLoader.enablePlugin(org/purugin/RubyPluginLoader.java:49) ~[?:?]
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(org/bukkit/plugin/SimplePluginManager.java:384) ~[craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at java.lang.reflect.Method.invoke(java/lang/reflect/Method.java:606) ~[?:1.7.0_51]
    at RUBY.onEnable(jar:file:/Volumes/Data/Developpement/Minecraft/bukkit/purugin/plugins/purugin-0.7.1-bukkit-1.7.2-R0.2.jar!/purugin.rb:71) ~[?:?]
    at org.jruby.RubyHash.each(org/jruby/RubyHash.java:1339) ~[jruby-complete-1.7.11.jar:?]
    at RUBY.onEnable(jar:file:/Volumes/Data/Developpement/Minecraft/bukkit/purugin/plugins/purugin-0.7.1-bukkit-1.7.2-R0.2.jar!/purugin.rb:71) ~[?:?]
    at org.purugin.PuruginPlugin.onEnable(org/purugin/PuruginPlugin.java:30) [purugin-0.7.1-bukkit-1.7.2-R0.2.jar:?]
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(org/bukkit/plugin/java/JavaPlugin.java:218) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(org/bukkit/plugin/java/JavaPluginLoader.java:457) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(org/bukkit/plugin/SimplePluginManager.java:384) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugin(org/bukkit/craftbukkit/v1_7_R1/CraftServer.java:298) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at org.bukkit.craftbukkit.v1_7_R1.CraftServer.enablePlugins(org/bukkit/craftbukkit/v1_7_R1/CraftServer.java:280) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at org.bukkit.craftbukkit.v1_7_R1.CraftServer.reload(org/bukkit/craftbukkit/v1_7_R1/CraftServer.java:630) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at org.bukkit.Bukkit.reload(org/bukkit/Bukkit.java:279) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at org.bukkit.command.defaults.ReloadCommand.execute(org/bukkit/command/defaults/ReloadCommand.java:23) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at org.bukkit.command.SimpleCommandMap.dispatch(org/bukkit/command/SimpleCommandMap.java:196) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at org.bukkit.craftbukkit.v1_7_R1.CraftServer.dispatchCommand(org/bukkit/craftbukkit/v1_7_R1/CraftServer.java:542) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at org.bukkit.craftbukkit.v1_7_R1.CraftServer.dispatchServerCommand(org/bukkit/craftbukkit/v1_7_R1/CraftServer.java:529) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at net.minecraft.server.v1_7_R1.DedicatedServer.aw(net/minecraft/server/v1_7_R1/DedicatedServer.java:286) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at net.minecraft.server.v1_7_R1.DedicatedServer.u(net/minecraft/server/v1_7_R1/DedicatedServer.java:251) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at net.minecraft.server.v1_7_R1.MinecraftServer.t(net/minecraft/server/v1_7_R1/MinecraftServer.java:545) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at net.minecraft.server.v1_7_R1.MinecraftServer.run(net/minecraft/server/v1_7_R1/MinecraftServer.java:457) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) ~[craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(net/minecraft/server/v1_7_R1/SourceFile:617) [craftbukkit-1.7.2-R0.2.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]

For information, I have tried severals other PlayerEvent and they work without problems. So I don't really understand why this is happening for this one.

[enebo]

This is really mysterious...However, I just noticed this event has been deprecated:

/**
 * Represents a player related inventory event; note that this event never
 * actually did anything
 *
 * @deprecated Use {@link InventoryClickEvent} or {@link InventoryOpenEvent}
 *     instead, or one of the other inventory events in {@link
 *     org.bukkit.event.inventory}.
 */

I did try those events and they work fine. So I might remove player_inventory from Purugin since it is going away anyways and just punt on this.

[MangelMaxime]

Ok. But the problem is that InventoryOpenEvent is not fired when a player open his on inventory by pressing the 'E' key by default.

How ever this fact is not your concern. Thanks for the answer.

[enebo]

Ah yeah hopefully Bukkit ends up fixing that otherwise this deprecation is not so nice...

[MangelMaxime]

Yes that sure. But as far as I remember this event have never been fired by the player inventory.