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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-23754] $unwind should error when it encounters arrays within arrays</title>
                <link>https://jira.mongodb.org/browse/SERVER-23754</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p/&gt;
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&lt;p/&gt;

&lt;p&gt;This is not very intuitive, and there doesn&apos;t seem to be any obvious reasonable output, so we should error in this case.&lt;/p&gt;</description>
                <environment></environment>
        <key id="280039">SERVER-23754</key>
            <summary>$unwind should error when it encounters arrays within arrays</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="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="backlog-query-optimization">Backlog - Query Optimization</assignee>
                                    <reporter username="charlie.swanson@mongodb.com">Charlie Swanson</reporter>
                        <labels>
                            <label>query-44-grooming</label>
                            <label>storch</label>
                    </labels>
                <created>Fri, 15 Apr 2016 16:41:52 +0000</created>
                <updated>Tue, 6 Dec 2022 04:27:55 +0000</updated>
                                                                            <component>Aggregation Framework</component>
                                        <votes>1</votes>
                                    <watches>10</watches>
                                                                                                                <comments>
                            <comment id="2186513" author="charlie.swanson" created="Wed, 20 Mar 2019 18:38:55 +0000"  >&lt;p&gt;Yea looks wrong to me. Want to fix it? I&apos;m not sure if there&apos;s another DOCS ticket that&apos;s more appropriate.&#160;&lt;/p&gt;</comment>
                            <comment id="2186500" author="asya" created="Wed, 20 Mar 2019 18:33:46 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=charlie.swanson&quot; class=&quot;user-hover&quot; rel=&quot;charlie.swanson&quot;&gt;charlie.swanson&lt;/a&gt; is the docs ticket linked here wrong?  it&apos;s about $lookup on array, and this ticket is about $unwind on (nested) array... &lt;/p&gt;</comment>
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            <issuekey id="44103">SERVER-6436</issuekey>
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