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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-3191] BSONObj::operator= issue with aliasing</title>
                <link>https://jira.mongodb.org/browse/SERVER-3191</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;the following was failing:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;after = after&lt;span class=&quot;error&quot;&gt;&amp;#91;&amp;quot;opcounters&amp;quot;&amp;#93;&lt;/span&gt;.Obj();&lt;br/&gt;
this worked:&lt;br/&gt;
+        after = after&lt;span class=&quot;error&quot;&gt;&amp;#91;&amp;quot;opcounters&amp;quot;&amp;#93;&lt;/span&gt;.Obj().copy();&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;After was &apos;owned&apos;.  i&apos;m guessing there is an issue with assignment of bsonobj&apos;s and aliasing &amp;#8211; i.e. when one assigns to one&apos;s self.  I don&apos;t really understand the Holder class so if aaron can fix that would be great.&lt;/p&gt;

&lt;p&gt;Ideally we would not slow things down with checks or things as this almost never happens.  if there is a solution that maintains speed, great; if not if we can dassert on aliased assignment that would work well.  note lhs.this != rhs.this as the object on the rhs is a subobject.&lt;/p&gt;</description>
                <environment></environment>
        <key id="17879">SERVER-3191</key>
            <summary>BSONObj::operator= issue with aliasing</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="dwight@mongodb.com">Dwight Merriman</assignee>
                                    <reporter username="dwight@mongodb.com">Dwight Merriman</reporter>
                        <labels>
                    </labels>
                <created>Fri, 3 Jun 2011 18:53:56 +0000</created>
                <updated>Mon, 29 Aug 2011 15:56:53 +0000</updated>
                            <resolved>Fri, 3 Jun 2011 20:42:20 +0000</resolved>
                                                                    <component>Internal Client</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="36034" author="eliot" created="Fri, 3 Jun 2011 20:42:20 +0000"  >&lt;p&gt;I actually things are correct as is and this was just a bug in the code using it.&lt;/p&gt;</comment>
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