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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-827] Server Crash when client logs in with invalid difficulty</title>
                <link>https://bugs.mojang.com/browse/MC-827</link>
                <project id="10400" key="MC">Minecraft: Java Edition</project>
                    <description>&lt;p&gt;The server (privately hosted on my PC and have had no issues in previous versions) crashes within seconds upon any user logging into it without fail since the 1.4.2 version of the client and server have been updated.&lt;/p&gt;

&lt;p&gt;This happens in a brand new world/seed and in our existing seeds/worlds from previous versions.&lt;/p&gt;

&lt;p&gt;Server log generates the following:&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;SEVERE] Encountered an unexpected exception ArrayIndexOutOfBoundsException
java.lang.ArrayIndexOutOfBoundsException: 4
	at qa.bD(SourceFile:261)
	at xr.a(SourceFile:162)
	at xr.a(SourceFile:139)
	at ie.b(SourceFile:106)
	at net.minecraft.server.MinecraftServer.r(SourceFile:717)
	at hg.r(SourceFile:233)
	at net.minecraft.server.MinecraftServer.q(SourceFile:661)
	at net.minecraft.server.MinecraftServer.run(SourceFile:595)
	at fp.run(SourceFile:818)
[SEVERE] This crash report has been saved to: D:\Minecraft\1.4.2 Server\.\crash-reports\crash-2012-10-26_18.03.47-server.txt&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;p&gt;See attached crash report for further information.  Apologies if this is a repeat issue, I did briefly scan the other issue titles.&lt;/p&gt;</description>
                <environment>Vanilla Minecraft Version 1.4.2 and Server 1.4.2&lt;br/&gt;
Windows 7 x64&lt;br/&gt;
Java Version 6 Update 37</environment>
        <key id="12107">MC-827</key>
            <summary>Server Crash when client logs in with invalid difficulty</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="dinnerbone">[Mojang] Nathan Adams</assignee>
                                    <reporter username="haz">Shaun Wawro</reporter>
                        <labels>
                            <label>crash</label>
                            <label>server</label>
                    </labels>
                <created>Sat, 27 Oct 2012 03:21:56 +0200</created>
                <updated>Fri, 7 Jul 2017 06:45:06 +0200</updated>
                            <resolved>Mon, 29 Oct 2012 13:55:08 +0100</resolved>
                                    <version>Minecraft 1.4.2</version>
                                    <fixVersion>Minecraft 1.4.3</fixVersion>
                                                        <votes>4</votes>
                                    <watches>2</watches>
                                                                            <comments>
                            <comment id="14988" author="pmerriam" created="Mon, 29 Oct 2012 14:12:24 +0100"  >&lt;p&gt;&lt;img class=&quot;emoticon&quot; src=&quot;https://bugs.mojang.com/images/icons/emoticons/thumbs_up.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt; Confirmed - my error.  Typo on the difficulty line.  22 where I wanted to type 2.  Thank you! &lt;/p&gt;</comment>
                            <comment id="14982" author="dinnerbone" created="Mon, 29 Oct 2012 13:55:08 +0100"  >&lt;p&gt;This is fixed in the next version, however the issue stems from having an invalid difficulty. Don&apos;t do that. &lt;img class=&quot;emoticon&quot; src=&quot;https://bugs.mojang.com/images/icons/emoticons/biggrin.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/p&gt;</comment>
                            <comment id="14895" author="falkreon" created="Mon, 29 Oct 2012 03:05:57 +0100"  >&lt;p&gt;I wonder if this is related to &lt;a href=&quot;https://bugs.mojang.com/browse/MC-984&quot; title=&quot;Internal exception: java.io.IOException: Bad packet id 249&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-984&quot;&gt;&lt;del&gt;MC-984&lt;/del&gt;&lt;/a&gt;? Our users are kicked off with bad packets the instant they login, or negative key lengths, or a number of other problems, and nothing is modded. I hope they fix this, it&apos;s frustrating.&lt;/p&gt;</comment>
                            <comment id="14769" author="ultrons" created="Sun, 28 Oct 2012 20:29:57 +0100"  >&lt;p&gt;Seems to happen when I changed to difficulty 4 on server settings. On Linux and Windows.&lt;/p&gt;</comment>
                            <comment id="14504" author="pmerriam" created="Sat, 27 Oct 2012 22:00:35 +0200"  >&lt;p&gt;I&apos;m seeing the same issue on our private ubuntu server.  &lt;br/&gt;
Unmodded MC 1.4.2.Server runs fine until a user connects.  As soon as user connects, server crashes.  Crash report attached.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10102">
                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="14818">MC-2941</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
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                <attachments>
                            <attachment id="11108" name="crash-2012-10-26_18.03.47-server.txt" size="1408" author="haz" created="Sat, 27 Oct 2012 03:21:56 +0200"/>
                            <attachment id="11187" name="crash-2012-10-26_22.04.17-server.txt" size="1482" author="pmerriam" created="Sat, 27 Oct 2012 22:00:30 +0200"/>
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