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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-6127] $project uasserts if an expected nested field has a non object parent in any source document</title>
                <link>https://jira.mongodb.org/browse/SERVER-6127</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p/&gt;
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&lt;p/&gt;

&lt;p&gt;Observed behavior: $project asserts if a field path references a non object parent.&lt;br/&gt;
Expected behavior: $project treats the field path as missing.&lt;/p&gt;</description>
                <environment></environment>
        <key id="41677">SERVER-6127</key>
            <summary>$project uasserts if an expected nested field has a non object parent in any source document</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="matt.dannenberg">Matt Dannenberg</assignee>
                                    <reporter username="aaron">Aaron Staple</reporter>
                        <labels>
                    </labels>
                <created>Tue, 19 Jun 2012 06:05:23 +0000</created>
                <updated>Mon, 11 Jul 2016 18:33:28 +0000</updated>
                            <resolved>Fri, 29 Jun 2012 18:55:14 +0000</resolved>
                                                    <fixVersion>2.2.0-rc0</fixVersion>
                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="138054" author="auto" created="Fri, 29 Jun 2012 18:49:11 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-06-25T08:10:06-07:00&apos;, u&apos;email&apos;: u&apos;dannenberg.matt@gmail.com&apos;, u&apos;name&apos;: u&apos;Matt Dannenberg&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-6127&quot; title=&quot;$project uasserts if an expected nested field has a non object parent in any source document&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-6127&quot;&gt;&lt;del&gt;SERVER-6127&lt;/del&gt;&lt;/a&gt; remove uassert from aggro pathparsing&lt;/p&gt;

&lt;p&gt;$project returns undefined instead of an error when a nested document doesnt&lt;br/&gt;
exist along the specified path&lt;br/&gt;
corresponding test added&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/dda980dcfda0e05738686fe7fdad6e1e6a6466e3&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/dda980dcfda0e05738686fe7fdad6e1e6a6466e3&lt;/a&gt;&lt;/p&gt;</comment>
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