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    <language>en-us</language>    <build-info>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-1435] Crash in MapReduce when mapper emits value that contains recursive structure</title>
                <link>https://jira.mongodb.org/browse/SERVER-1435</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Whenever a MapReduce mapper emits an object that has a recursive structure, mongod crashes with a segmentation fault. For example:&lt;/p&gt;

&lt;p&gt;function map() {&lt;br/&gt;
   var x = &lt;/p&gt;
{foo:1}
&lt;p&gt;;&lt;br/&gt;
   x.bar = x;&lt;br/&gt;
   emit(this._id, x);&lt;br/&gt;
}&lt;/p&gt;

&lt;p&gt;Removing the line &quot;x.bar = x;&quot; solves the issue. Although recursivity in M/R should probably be disallowed, the database should of course not crash.&lt;/p&gt;</description>
                <environment>GNU/Debian, x64&lt;br/&gt;
&lt;br/&gt;
db version v1.4.4, pdfile version 4.5&lt;br/&gt;
Sun Jul 18 17:28:59 git version: 9dcac11bd72c7cb34ca278313f033efcdd4908eb&lt;br/&gt;
</environment>
        <key id="12473">SERVER-1435</key>
            <summary>Crash in MapReduce when mapper emits value that contains recursive structure</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="eliot">Eliot Horowitz</assignee>
                                    <reporter username="tommyvdv">Tommy V</reporter>
                        <labels>
                    </labels>
                <created>Sun, 18 Jul 2010 11:31:52 +0000</created>
                <updated>Tue, 12 Jul 2016 00:28:59 +0000</updated>
                            <resolved>Sun, 18 Jul 2010 18:46:48 +0000</resolved>
                                    <version>1.4.4</version>
                                    <fixVersion>1.5.6</fixVersion>
                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="15895" author="eliot" created="Sun, 18 Jul 2010 18:46:48 +0000"  >&lt;p&gt;Not planning on backportsing since a bit of a complex fix and its only on bad user data&lt;/p&gt;</comment>
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