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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-74060] Pipeline clone() can lead to dangling opCtx pointers</title>
                <link>https://jira.mongodb.org/browse/SERVER-74060</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When a pipeline is cloned() with no argument (treated as a &lt;tt&gt;null&lt;/tt&gt; ExpressionContext), some stages will create their own &lt;a href=&quot;https://github.com/10gen/mongo/blob/56b8b371ceca0f51d8e030885e3b6ee63603d64d/src/mongo/db/pipeline/document_source_union_with.h#L79-L82&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;new expression context&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;The result is a pipeline where the stages do not share the same ExpressionContext, which is wrong.&lt;/p&gt;

&lt;p&gt;This ticket is to&lt;br/&gt;
(a) Fix clone() and define what it means to clone a pipeline without a new operation context. What does it mean for DocumentSources with a sub-pipeline?&lt;br/&gt;
(c) Add invariants to check that the members of a pipeline are using the same ExpressionContext in various places.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="2265727">SERVER-74060</key>
            <summary>Pipeline clone() can lead to dangling opCtx pointers</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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="13201">Fixed</resolution>
                                        <assignee username="alyssa.clark@mongodb.com">Alyssa Clark</assignee>
                                    <reporter username="ian.boros@mongodb.com">Ian Boros</reporter>
                        <labels>
                    </labels>
                <created>Wed, 15 Feb 2023 18:41:55 +0000</created>
                <updated>Mon, 6 Nov 2023 16:30:22 +0000</updated>
                            <resolved>Thu, 23 Feb 2023 22:08:50 +0000</resolved>
                                                    <fixVersion>7.0.0-rc0</fixVersion>
                    <fixVersion>6.0.12</fixVersion>
                                                        <votes>0</votes>
                                    <watches>9</watches>
                                                                                                                <comments>
                            <comment id="5857626" author="xgen-internal-githook" created="Mon, 6 Nov 2023 16:18:22 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Alyssa Wagenmaker&apos;, &apos;email&apos;: &apos;alyssa.wagenmaker@mongodb.com&apos;, &apos;username&apos;: &apos;awagenmaker&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-74060&quot; title=&quot;Pipeline clone() can lead to dangling opCtx pointers&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-74060&quot;&gt;&lt;del&gt;SERVER-74060&lt;/del&gt;&lt;/a&gt; enforce consistent opCtx across all pipeline sources&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 5c57a8874e277424a3b993b14c04be60d25b6742)&lt;br/&gt;
Branch: v6.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d2a538e88cde4692f183b560a63a6efbed52e13d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d2a538e88cde4692f183b560a63a6efbed52e13d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5226860" author="xgen-internal-githook" created="Thu, 23 Feb 2023 21:53:26 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Alyssa Wagenmaker&apos;, &apos;email&apos;: &apos;alyssa.wagenmaker@mongodb.com&apos;, &apos;username&apos;: &apos;awagenmaker&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-74060&quot; title=&quot;Pipeline clone() can lead to dangling opCtx pointers&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-74060&quot;&gt;&lt;del&gt;SERVER-74060&lt;/del&gt;&lt;/a&gt; enforce consistent opCtx across all pipeline sources&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/5c57a8874e277424a3b993b14c04be60d25b6742&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/5c57a8874e277424a3b993b14c04be60d25b6742&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="2489746">SERVER-82749</issuekey>
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