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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-3335] Probably undefined behaviour</title>
                <link>https://jira.mongodb.org/browse/SERVER-3335</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In the latest git pull I noticed the following:&lt;/p&gt;

&lt;p&gt;db/repl.h:89 - unique_ptr&amp;lt;ThreadPool&amp;gt; tp;&lt;br/&gt;
ReplSource class has an auto_ptr to ThreadPool (which is a non-copyable)&lt;/p&gt;

&lt;p&gt;db/repl.c:353 - v.push_back( shared_ptr&amp;lt; ReplSource &amp;gt;( new ReplSource( s ) ) );&lt;br/&gt;
Does a cope of one ReplSource to another.&lt;/p&gt;

&lt;p&gt;As there is no copy contructor for ReplSource .. if &apos;s&apos; has a &apos;tp&apos; assigned, something bad will happen.&lt;/p&gt;

&lt;p&gt;Most likely the new ReplSource will get the first ReplSource&apos;s thread pool, and the first one&apos;s will become null.&lt;/p&gt;

&lt;p&gt;Probably the designed behaviour would be to have the new ReplSource build its own thread pool, and not steal &apos;s&apos;s one.&lt;/p&gt;

&lt;p&gt;I guess the fix would be to give ReplSource a copy constructor, that handles auto_ptr&amp;lt;ThreadPool&amp;gt; correctly (by leaving the original, and creating a new one for the new copy).&lt;/p&gt;</description>
                <environment>N/A</environment>
        <key id="18710">SERVER-3335</key>
            <summary>Probably undefined behaviour</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="eliot">Eliot Horowitz</assignee>
                                    <reporter username="matiu">Matthew Sherborne</reporter>
                        <labels>
                            <label>replication</label>
                            <label>threads</label>
                    </labels>
                <created>Sat, 25 Jun 2011 12:12:55 +0000</created>
                <updated>Tue, 12 Jul 2016 00:19:00 +0000</updated>
                            <resolved>Sun, 26 Jun 2011 05:14:20 +0000</resolved>
                                    <version>1.9.0</version>
                                    <fixVersion>1.9.1</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="39260" author="auto" created="Sun, 26 Jun 2011 05:14:23 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;login&apos;: u&apos;erh&apos;, u&apos;name&apos;: u&apos;Eliot Horowitz&apos;, u&apos;email&apos;: u&apos;eliot@10gen.com&apos;}
&lt;p&gt;Message: safer access &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-3335&quot; title=&quot;Probably undefined behaviour&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-3335&quot;&gt;&lt;del&gt;SERVER-3335&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/5cbe8caea270c855fa2698f9e73da07a2d6f5a29&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/5cbe8caea270c855fa2698f9e73da07a2d6f5a29&lt;/a&gt;&lt;/p&gt;</comment>
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