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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-15047] Timestamp class relies on undefined behavior</title>
                <link>https://jira.mongodb.org/browse/SERVER-15047</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The OpTime class assumes that it can dereference a casted pointer to its first uint32_t data member and read both data members out as a combined uint64_t. This is undefined behavior and is an aliasing violation.&lt;/p&gt;

&lt;p&gt;In addition, OpTime has a specified memory ordering but does not use endian conversion primitives to ensure that it is properly serialized when written to the network or stable storage.&lt;/p&gt;</description>
                <environment></environment>
        <key id="154957">SERVER-15047</key>
            <summary>Timestamp class relies on undefined behavior</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="milkie@mongodb.com">Eric Milkie</assignee>
                                    <reporter username="andrew.morrow@mongodb.com">Andrew Morrow</reporter>
                        <labels>
                    </labels>
                <created>Tue, 26 Aug 2014 20:44:26 +0000</created>
                <updated>Sat, 19 Sep 2015 00:27:41 +0000</updated>
                            <resolved>Wed, 8 Apr 2015 20:29:40 +0000</resolved>
                                                    <fixVersion>3.1.2</fixVersion>
                                    <component>Internal Code</component>
                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="876877" author="xgen-internal-githook" created="Thu, 9 Apr 2015 12:03:00 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;milkie&apos;, u&apos;name&apos;: u&apos;Eric Milkie&apos;, u&apos;email&apos;: u&apos;milkie@10gen.com&apos;}
&lt;p&gt;Message: Revert &quot;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15047&quot; title=&quot;Timestamp class relies on undefined behavior&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-15047&quot;&gt;&lt;del&gt;SERVER-15047&lt;/del&gt;&lt;/a&gt; Remove undefined behavior from Timestamp&quot;&lt;/p&gt;

&lt;p&gt;This reverts commit e87716a9286b6aa6f63a513012e55f6e42f634a2.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/48f14493a3751483b67144897a44ed3297720f8c&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/48f14493a3751483b67144897a44ed3297720f8c&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="876293" author="xgen-internal-githook" created="Wed, 8 Apr 2015 20:27:29 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;milkie&apos;, u&apos;name&apos;: u&apos;Eric Milkie&apos;, u&apos;email&apos;: u&apos;milkie@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15047&quot; title=&quot;Timestamp class relies on undefined behavior&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-15047&quot;&gt;&lt;del&gt;SERVER-15047&lt;/del&gt;&lt;/a&gt; Remove undefined behavior from Timestamp&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e87716a9286b6aa6f63a513012e55f6e42f634a2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e87716a9286b6aa6f63a513012e55f6e42f634a2&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="873812" author="milkie" created="Mon, 6 Apr 2015 19:13:19 +0000"  >&lt;p&gt;Class being renamed to &quot;Timestamp&quot;; still has aliasing/endian problems.  To be fixed with this work ticket.&lt;/p&gt;</comment>
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