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    <title>MongoDB Jira</title>
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    <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>[CDRIVER-1051] ASAN/UBSAN: misaligned address</title>
                <link>https://jira.mongodb.org/browse/CDRIVER-1051</link>
                <project id="10030" key="CDRIVER">C Driver</project>
                    <description>&lt;p&gt;CRAN reports some misaligned address errors for mongolite:&lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;&lt;a href=&quot;http://www.stats.ox.ac.uk/pub/bdr/memtests/clang-UBSAN/mongolite-Ex.Rout&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;clang-ubsan&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;&lt;a href=&quot;http://www.stats.ox.ac.uk/pub/bdr/memtests/gcc-ASAN/mongolite/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;gcc-asan&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;&lt;a href=&quot;http://www.stats.ox.ac.uk/pub/bdr/memtests/gcc-UBSAN/mongolite-Ex.Rout&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;gss-ubsan&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;I did compile the with &lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;-DBSON_EXTRA_ALIGN&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;. Is there something I can do to fix this?&lt;/p&gt;</description>
                <environment></environment>
        <key id="243667">CDRIVER-1051</key>
            <summary>ASAN/UBSAN: misaligned address</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="bjori">Hannes Magnusson</assignee>
                                    <reporter username="Jeroenooms">Jeroen Ooms [X]</reporter>
                        <labels>
                    </labels>
                <created>Sun, 13 Dec 2015 12:59:23 +0000</created>
                <updated>Mon, 25 Jul 2022 14:08:27 +0000</updated>
                            <resolved>Mon, 18 Jul 2016 23:27:59 +0000</resolved>
                                                    <fixVersion>1.4.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1328089" author="jeroenooms" created="Tue, 19 Jul 2016 08:49:18 +0000"  >&lt;p&gt;Actually the warnings appear without BSON_EXTRA_ALIGN.&lt;/p&gt;</comment>
                            <comment id="1327735" author="bjori" created="Mon, 18 Jul 2016 23:28:00 +0000"  >&lt;p&gt;There isn&apos;t anything we can do about the alignment warning when you compile with BSON_EXTRA_ALIGN. We recommend to set that to off.&lt;/p&gt;

&lt;p&gt;As for the overflow warning in the scram mechanism, if you can still reproduce that please file a separate ticket for it.&lt;/p&gt;

&lt;p&gt;We are working on automatic similar checks in our CI infrastructure btw, se linked tickets.&lt;/p&gt;</comment>
                            <comment id="1187750" author="jeroenooms" created="Mon, 29 Feb 2016 15:13:15 +0000"  >&lt;p&gt;FYI here are ASAN/UBSAN for GCC6:&lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;&lt;a href=&quot;http://www.stats.ox.ac.uk/pub/bdr/memtests/gcc6-ASAN/mongolite/00check.log&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://www.stats.ox.ac.uk/pub/bdr/memtests/gcc6-ASAN/mongolite/00check.log&lt;/a&gt;&lt;/li&gt;
	&lt;li&gt;&lt;a href=&quot;http://www.stats.ox.ac.uk/pub/bdr/memtests/gcc6-UBSAN/mongolite-Ex.Rout&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://www.stats.ox.ac.uk/pub/bdr/memtests/gcc6-UBSAN/mongolite-Ex.Rout&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;My repo maintainers keep complaining about this; hopefully these can be fixed soon &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/smile.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="244599">CDRIVER-1055</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="2097764">CDRIVER-4434</issuekey>
        </issuelink>
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                                        <issuelink>
            <issuekey id="217087">CDRIVER-747</issuekey>
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