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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-1388] Assertion failure on $or $in empty array</title>
                <link>https://jira.mongodb.org/browse/SERVER-1388</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I&apos;m getting an assertion failure (line db/queryutil.cpp:706) whenever &quot;{$in: []}&quot; appears within an $or. A nontrivial $in works fine, and &quot;{$in: []}&quot; works fine at the top level of the query (I&apos;ve attached a transcript to illustrate this).&lt;/p&gt;

&lt;p&gt;The application-level workaround is obvious &#8212; if you&apos;re building a query where $in appears within $or, omit the $in if the array happens to be empty &#8212; so this isn&apos;t urgent for me (not nearly as much as $or is a lifesaver &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/smile.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt; ), but it&apos;s inconvenient, and moreover this could be a much subtler issue in a bigger project with complex queries, especially if some list is &quot;usually&quot; empty.&lt;/p&gt;</description>
                <environment>Ubuntu Lucid</environment>
        <key id="12398">SERVER-1388</key>
            <summary>Assertion failure on $or $in empty array</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="3">Duplicate</resolution>
                                        <assignee username="eliot">Eliot Horowitz</assignee>
                                    <reporter username="jyrinx">Luke Maurer</reporter>
                        <labels>
                    </labels>
                <created>Fri, 9 Jul 2010 17:05:14 +0000</created>
                <updated>Tue, 29 May 2012 14:53:23 +0000</updated>
                            <resolved>Sat, 17 Dec 2011 04:28:20 +0000</resolved>
                                    <version>1.5.4</version>
                                                    <component>Querying</component>
                                        <votes>0</votes>
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