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    <title>MongoDB Jira</title>
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    <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-49827] [SBE] Fix latent bug in ExpressionPostVisitor causing a failure in &quot;sanity.js&quot;</title>
                <link>https://jira.mongodb.org/browse/SERVER-49827</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;After the fix for &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49123&quot; title=&quot;Support $size in SBE&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49123&quot;&gt;&lt;del&gt;SERVER-49123&lt;/del&gt;&lt;/a&gt;&#160;landed in master, I noticed a new failure starting happening in the &quot;sanity.js&quot; test from the old SBE branch.&lt;/p&gt;

&lt;p&gt;Upon investigating the new failure, I discovered that there was a latent bug in generateTraverse() in &quot;sbe_stage_builder_expression.cpp&quot; that has been there for a while. If you look at generateTraverse() around line 304, you&apos;ll see a TraverseStage being constructed without a depth limit - let&apos;s call this TraverseStage &quot;T&quot;. Based on what I know about the code, I&apos;m fairly confident that not having a depth limit on TraverseStage T is wrong.&lt;/p&gt;

&lt;p&gt;Prior to the fix for &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49123&quot; title=&quot;Support $size in SBE&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49123&quot;&gt;&lt;del&gt;SERVER-49123&lt;/del&gt;&lt;/a&gt; (which included the fix for the &quot;TraverseStage depth limit&quot; bug), TraverseStage T happened to produce correct results (at least for the cases that &quot;sanity.js&quot; exercises) because another TraverseStage with a depth limit was filtering out all the array values first before they could reach TraverseStage T. When the &quot;TraverseStage depth limit&quot; bug got fixed, this latent bug emerged (because now there isn&apos;t another TraverseStage earlier in the plan tree filtering out array values before they reach TraverseStage T).&lt;/p&gt;

&lt;p&gt;The goal of this task is to fix the latent bug in ExpressionPostVisitor so that the &quot;sanity.js&quot; test passes (ignoring the $abs related failures, which is a separate issue).&lt;/p&gt;</description>
                <environment></environment>
        <key id="1417766">SERVER-49827</key>
            <summary>[SBE] Fix latent bug in ExpressionPostVisitor causing a failure in &quot;sanity.js&quot;</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="13201">Fixed</resolution>
                                        <assignee username="andrew.paroski@mongodb.com">Drew Paroski</assignee>
                                    <reporter username="andrew.paroski@mongodb.com">Drew Paroski</reporter>
                        <labels>
                            <label>qexec-team</label>
                    </labels>
                <created>Thu, 23 Jul 2020 04:50:04 +0000</created>
                <updated>Sun, 29 Oct 2023 22:05:21 +0000</updated>
                            <resolved>Thu, 23 Jul 2020 23:24:30 +0000</resolved>
                                                    <fixVersion>4.7.0</fixVersion>
                                    <component>Querying</component>
                                        <votes>0</votes>
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                                                                                                                <comments>
                            <comment id="3299833" author="xgen-internal-githook" created="Thu, 23 Jul 2020 23:14:49 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Drew Paroski&apos;, &apos;email&apos;: &apos;drew.paroski@mongodb.com&apos;, &apos;username&apos;: &apos;paroski&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49827&quot; title=&quot;[SBE] Fix latent bug in ExpressionPostVisitor causing a failure in &amp;quot;sanity.js&amp;quot;&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49827&quot;&gt;&lt;del&gt;SERVER-49827&lt;/del&gt;&lt;/a&gt; &lt;span class=&quot;error&quot;&gt;&amp;#91;SBE&amp;#93;&lt;/span&gt; Fix latent bug in ExpressionPostVisitor causing a failure in &quot;sanity.js&quot;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/20a929019d14e7fab4f9c6f5acf01e2544f37a7a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/20a929019d14e7fab4f9c6f5acf01e2544f37a7a&lt;/a&gt;&lt;/p&gt;</comment>
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