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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-988] mysterious &apos;pure virtual method called&apos; failure</title>
                <link>https://jira.mongodb.org/browse/SERVER-988</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&amp;lt;&lt;a href=&quot;http://buildbot.mongodb.org/builders/OS%20X%2010.4%2032-bit/builds/459/steps/test_3/logs/stdio&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://buildbot.mongodb.org/builders/OS%20X%2010.4%2032-bit/builds/459/steps/test_3/logs/stdio&lt;/a&gt;&amp;gt;&lt;br/&gt;
&amp;lt;&lt;a href=&quot;http://buildbot.mongodb.org/builders/OS%20X%2010.5%2064-bit/builds/646/steps/test_3/logs/stdio&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://buildbot.mongodb.org/builders/OS%20X%2010.5%2064-bit/builds/646/steps/test_3/logs/stdio&lt;/a&gt;&amp;gt;&lt;/p&gt;

&lt;p&gt;probably trying to use a freed object, not sure which one&lt;/p&gt;

&lt;p&gt;let me know if you want me to work on it&lt;/p&gt;</description>
                <environment></environment>
        <key id="11733">SERVER-988</key>
            <summary>mysterious &apos;pure virtual method called&apos; failure</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="mathias@mongodb.com">Mathias Stearn</assignee>
                                    <reporter username="aaron">Aaron Staple</reporter>
                        <labels>
                    </labels>
                <created>Thu, 8 Apr 2010 14:29:38 +0000</created>
                <updated>Tue, 12 Jul 2016 00:29:42 +0000</updated>
                            <resolved>Thu, 8 Apr 2010 21:07:51 +0000</resolved>
                                                    <fixVersion>1.5.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="13888" author="eliot" created="Mon, 26 Apr 2010 13:51:19 +0000"  >&lt;p&gt;in a release&lt;/p&gt;</comment>
                            <comment id="13522" author="auto" created="Thu, 8 Apr 2010 19:57:59 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;login&apos;: &apos;RedBeard0531&apos;, &apos;name&apos;: &apos;Mathias Stearn&apos;, &apos;email&apos;: &apos;mathias@10gen.com&apos;}
&lt;p&gt;Message: Prevent calls to pure virtual functions in MongoFile &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-988&quot; title=&quot;mysterious &amp;#39;pure virtual method called&amp;#39; failure&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-988&quot;&gt;&lt;del&gt;SERVER-988&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;The issue was that during construction and destruction an object&apos;s vtable&lt;br/&gt;
points to the current type rather than the most derived type. ~MongoFile() tried&lt;br/&gt;
to take a lock, but the function holding the lock tried to use the object,&lt;br/&gt;
calling either the close() or flush() virtual methods. The solution was to move&lt;br/&gt;
the call that needed the lock to the most derived class&apos;s destructor. The&lt;br/&gt;
easiest way to increase the probability of this crash is by using --syncdelay 1.&lt;br/&gt;
&lt;a href=&quot;http://github.com/mongodb/mongo/commit/dfa0c41aa11ae1d97576e1b72180f0a398d4894a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://github.com/mongodb/mongo/commit/dfa0c41aa11ae1d97576e1b72180f0a398d4894a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="13518" author="aaron" created="Thu, 8 Apr 2010 16:50:24 +0000"  >&lt;p&gt;seems like you&apos;re looking into it.  Go ahead and reassign to me if you want me to investigate at some point instead.&lt;/p&gt;</comment>
                            <comment id="13513" author="auto" created="Thu, 8 Apr 2010 15:58:46 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;login&apos;: &apos;astaple&apos;, &apos;name&apos;: &apos;Aaron&apos;, &apos;email&apos;: &apos;aaron@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-988&quot; title=&quot;mysterious &amp;#39;pure virtual method called&amp;#39; failure&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-988&quot;&gt;&lt;del&gt;SERVER-988&lt;/del&gt;&lt;/a&gt; debug&lt;br/&gt;
&lt;a href=&quot;http://github.com/mongodb/mongo/commit/5a235ba8f6477b8c20a943303a6c9c002e1505a5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://github.com/mongodb/mongo/commit/5a235ba8f6477b8c20a943303a6c9c002e1505a5&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="13508" author="eliot" created="Thu, 8 Apr 2010 14:31:18 +0000"  >&lt;p&gt;sure&lt;br/&gt;
it has to do with the MMF abstraction dwight added.&lt;br/&gt;
started happening right after that&lt;/p&gt;</comment>
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