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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-2451] seg fault when cursor invalidated during explain yield</title>
                <link>https://jira.mongodb.org/browse/SERVER-2451</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If we can&apos;t recover from a yield when explain is enabled, then inside finish() _c will be zero and we will seg fault in the call to noteScan().  I&apos;ll be checking in a test and can fix this too if you want - can we fix by asserting in this case?  Otherwise it looks like we could grab the necessary info from the cursor in the beginning of running the query before any yielding happens.&lt;/p&gt;</description>
                <environment></environment>
        <key id="14375">SERVER-2451</key>
            <summary>seg fault when cursor invalidated during explain yield</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="9">Done</resolution>
                                        <assignee username="aaron">Aaron Staple</assignee>
                                    <reporter username="aaron">Aaron Staple</reporter>
                        <labels>
                    </labels>
                <created>Tue, 1 Feb 2011 01:33:45 +0000</created>
                <updated>Tue, 12 Jul 2016 00:20:30 +0000</updated>
                            <resolved>Tue, 1 Feb 2011 05:15:52 +0000</resolved>
                                                    <fixVersion>1.7.6</fixVersion>
                                    <component>Concurrency</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="22929" author="auto" created="Tue, 1 Feb 2011 05:14:01 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;astaple&apos;, u&apos;name&apos;: u&apos;Aaron&apos;, u&apos;email&apos;: u&apos;aaron@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-2451&quot; title=&quot;seg fault when cursor invalidated during explain yield&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-2451&quot;&gt;&lt;del&gt;SERVER-2451&lt;/del&gt;&lt;/a&gt; guard dropped cursor on explain yield&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8330ff07664b1bbc1a966e5d224520872fbb245a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8330ff07664b1bbc1a966e5d224520872fbb245a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="22909" author="eliot" created="Tue, 1 Feb 2011 03:04:07 +0000"  >&lt;p&gt;Yes, asserting is fine.&lt;/p&gt;</comment>
                            <comment id="22898" author="aaron" created="Tue, 1 Feb 2011 01:45:25 +0000"  >&lt;p&gt;It&apos;s probably better if we just assert - the multikey flag of the index might change during a yield.  And if we do lose the cursor part way though the results like n, nscanned, etc can be bogus anyway.&lt;/p&gt;</comment>
                            <comment id="22897" author="auto" created="Tue, 1 Feb 2011 01:36:03 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;astaple&apos;, u&apos;name&apos;: u&apos;Aaron&apos;, u&apos;email&apos;: u&apos;aaron@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-2451&quot; title=&quot;seg fault when cursor invalidated during explain yield&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-2451&quot;&gt;&lt;del&gt;SERVER-2451&lt;/del&gt;&lt;/a&gt; test for seg fault when yielding during explain&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c4c41d831e6b65f6e11f274cd65b149bc53c45aa&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c4c41d831e6b65f6e11f274cd65b149bc53c45aa&lt;/a&gt;&lt;/p&gt;</comment>
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