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        <build-date>13-04-2023</build-date>
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            <title>[SERVER-81783] Investigate a segfault when not rebuilding VariableEnvironment after memo implementation phase</title>
                <link>https://jira.mongodb.org/browse/SERVER-81783</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;After running the memo implementation phase, we currently&#160;rebuild the env for each resulting plan &lt;a href=&quot;https://github.com/10gen/mongo/blob/a161212b8ad68ab67dba46a1d2e1ebef60f4e8a6/src/mongo/db/query/optimizer/opt_phase_manager.cpp#L267-L272&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;. The rebuild and the following assertion were initially added for debugging purposes but now appear to be hiding a bug that can cause a segmentation fault if the env is not rebuilt after running physical rewrites. We should investigate and fix the segfault, and only call rebuild in debug builds. See &lt;a href=&quot;https://github.com/10gen/mongo/pull/15928#issuecomment-1743312234&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this comment&lt;/a&gt; for a more detailed description of the segmentation fault.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2457120">SERVER-81783</key>
            <summary>Investigate a segfault when not rebuilding VariableEnvironment after memo implementation phase</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="henri.nikku@mongodb.com">Henri Nikku</reporter>
                        <labels>
                            <label>M9</label>
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                <created>Tue, 3 Oct 2023 10:47:59 +0000</created>
                <updated>Mon, 16 Oct 2023 08:44:05 +0000</updated>
                                                                                                <votes>0</votes>
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