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    <title>Mojang Studios Jira</title>
    <link>https://bugs.mojang.com</link>
    <description>This file is an XML representation of an issue</description>
    <language>en</language>    <build-info>
        <version>9.12.2</version>
        <build-number>9120002</build-number>
        <build-date>10-01-2024</build-date>
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<item>
            <title>[MC-10558] Internal error when using /effect with an id &gt;31</title>
                <link>https://bugs.mojang.com/browse/MC-10558</link>
                <project id="10400" key="MC">Minecraft: Java Edition</project>
                    <description>&lt;p&gt;If you use /effect and set the id value to be greater than 31 instead of displaying &quot;There is no such mob effect with that id&quot; it displays the internal error message that means the command has generally broken.&lt;/p&gt;

&lt;p&gt;See attachment (the outputs are from me trying numbers 30 to 33. I have also tried this with 43 (i was entering random numbers as parameters when I tried this)&lt;/p&gt;

&lt;p&gt;The exact command I ran was &quot; /effect @p 33 &quot; in case it is something else causing the message.&lt;/p&gt;</description>
                <environment></environment>
        <key id="24520">MC-10558</key>
            <summary>Internal error when using /effect with an id &gt;31</summary>
                <type id="1" iconUrl="https://bugs.mojang.com/secure/viewavatar?size=xsmall&amp;avatarId=18903&amp;avatarType=issuetype">Bug</type>
                                    <status id="5" iconUrl="https://bugs.mojang.com/images/icons/statuses/resolved.png" description="A resolution has been taken, and it is awaiting verification by reporter. From here issues are either reopened, or are closed.">Resolved</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="1">Fixed</resolution>
                                        <assignee username="jeb">[Mojang] Jeb (Jens Bergensten)</assignee>
                                    <reporter username="mickeyjm">Sir Lord Jeff</reporter>
                        <labels>
                            <label>command</label>
                            <label>effect</label>
                            <label>effects</label>
                            <label>internal</label>
                    </labels>
                <created>Thu, 28 Feb 2013 20:05:29 +0100</created>
                <updated>Wed, 6 May 2015 09:05:45 +0200</updated>
                            <resolved>Fri, 1 Mar 2013 13:53:47 +0100</resolved>
                                    <version>Snapshot 13w09b</version>
                                    <fixVersion>Snapshot 13w09c</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                            <comments>
                            <comment id="58368" author="kumasasa" created="Mon, 1 Apr 2013 21:37:18 +0200"  >&lt;p&gt;Remove the problematic potion effects with an NBT editor, e.g. NBT explorer.&lt;br/&gt;
See the format here : &lt;a href=&quot;http://www.minecraftwiki.net/wiki/Player.dat&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://www.minecraftwiki.net/wiki/Player.dat&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="58366" author="max1249" created="Mon, 1 Apr 2013 21:30:42 +0200"  >&lt;p&gt;i cant join my world.&lt;br/&gt;
i used /effect 0 500 1&lt;br/&gt;
Why?!?!?&lt;br/&gt;
when i join the world i only see the dirt wallpaper... &lt;img class=&quot;emoticon&quot; src=&quot;https://bugs.mojang.com/images/icons/emoticons/sad.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt; HELP ME PLEASSSSEEEE&lt;/p&gt;</comment>
                            <comment id="49021" author="mincrmatt12" created="Sat, 2 Mar 2013 14:29:33 +0100"  >&lt;p&gt;it does this because, although there can be 32 potion effects, some of which are for modders, anything above this limit causes the index in the list of potions to exceed maximum&lt;/p&gt;</comment>
                            <comment id="48457" author="kumasasa" created="Thu, 28 Feb 2013 21:17:48 +0100"  >&lt;p&gt;Confirmed:&lt;/p&gt;
&lt;div class=&quot;code panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;codeContent panelContent&quot;&gt;
&lt;pre class=&quot;code-java&quot;&gt;2013-02-28 21:16:59 [CLIENT] [INFO] [CHAT] &#186;cThere is no such mob effect with ID 31
2013-02-28 21:17:05 [CLIENT] [INFO] [CHAT] &#186;cAn unknown error occurred &lt;span class=&quot;code-keyword&quot;&gt;while&lt;/span&gt; attempting to perform &lt;span class=&quot;code-keyword&quot;&gt;this&lt;/span&gt; command
java.lang.ArrayIndexOutOfBoundsException: 32
        at ae.b(SourceFile:40)
        at y.a(SourceFile:51)
        at jg.d(SourceFile:478)
        at jg.a(SourceFile:460)
        at cw.a(SourceFile:44)
        at ch.b(SourceFile:59)
        at jg.d(SourceFile:59)
        at jh.b(SourceFile:35)
        at bja.b(SourceFile:84)
        at net.minecraft.server.MinecraftServer.r(SourceFile:480)
        at net.minecraft.server.MinecraftServer.q(SourceFile:397)
        at bix.q(SourceFile:122)
        at net.minecraft.server.MinecraftServer.run(SourceFile:331)
        at go.run(SourceFile:573)
&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;</comment>
                    </comments>
                    <attachments>
                            <attachment id="22804" name="Error.PNG" size="9782" author="mickeyjm" created="Thu, 28 Feb 2013 20:05:29 +0100"/>
                    </attachments>
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