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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>
    </build-info>


<item>
            <title>[SERVER-31721] Invalid $expr within $and can segfault on call to optimize</title>
                <link>https://jira.mongodb.org/browse/SERVER-31721</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This is only an issue in 3.5/3.6 and not in 3.4 or earlier.&lt;/p&gt;</description>
                <environment></environment>
        <key id="451107">SERVER-31721</key>
            <summary>Invalid $expr within $and can segfault on call to optimize</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="13201">Fixed</resolution>
                                        <assignee username="james.wahlin@mongodb.com">James Wahlin</assignee>
                                    <reporter username="james.wahlin@mongodb.com">James Wahlin</reporter>
                        <labels>
                    </labels>
                <created>Wed, 25 Oct 2017 19:40:18 +0000</created>
                <updated>Mon, 30 Oct 2023 23:12:32 +0000</updated>
                            <resolved>Fri, 27 Oct 2017 17:59:08 +0000</resolved>
                                    <version>3.6.0-rc1</version>
                                    <fixVersion>3.6.0-rc2</fixVersion>
                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1711403" author="xgen-internal-githook" created="Fri, 27 Oct 2017 17:58:46 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;james@mongodb.com&apos;, &apos;name&apos;: &apos;James Wahlin&apos;, &apos;username&apos;: &apos;jameswahlin&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-31721&quot; title=&quot;Invalid $expr within $and can segfault on call to optimize&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-31721&quot;&gt;&lt;del&gt;SERVER-31721&lt;/del&gt;&lt;/a&gt; invalid $expr within $and/$or can segfault on call to optimize&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1032951961fdd2fabb580e5e5bafd9201cfcf678&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1032951961fdd2fabb580e5e5bafd9201cfcf678&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1709225" author="james.wahlin@10gen.com" created="Wed, 25 Oct 2017 20:05:47 +0000"  >&lt;p&gt;I believe this is double free during ListOfMatchExpression::getOptimizer() call.&lt;/p&gt;

&lt;p&gt;In ListOfMatchExpression::getOptimizer(), we assign ownership for each MatchExpression child to a unique_ptr and MatchExpression::optimize() on the child:&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/blob/4a03a53a6a420c0baf9fd687a447fd6d942a1c84/src/mongo/db/matcher/expression_tree.cpp#L73-L75&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/4a03a53a6a420c0baf9fd687a447fd6d942a1c84/src/mongo/db/matcher/expression_tree.cpp#L73-L75&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;If an exception is thrown during this call then we will free the child MatchExpression as part of the unique_ptr going out of scope.&lt;/p&gt;

&lt;p&gt;As the stack unwinds, the ListOfMatchExpression parent object is freed. As part of its destruction, it attempts to free each of its children, resulting in the double free:&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/blob/4a03a53a6a420c0baf9fd687a447fd6d942a1c84/src/mongo/db/matcher/expression_tree.cpp#L40-L44&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/4a03a53a6a420c0baf9fd687a447fd6d942a1c84/src/mongo/db/matcher/expression_tree.cpp#L40-L44&lt;/a&gt;&lt;/p&gt;


</comment>
                            <comment id="1709194" author="james.wahlin@10gen.com" created="Wed, 25 Oct 2017 19:48:42 +0000"  >&lt;p&gt;Looks like this is due to an attempt to free a pointer which does not point to an allocated object:&lt;/p&gt;
&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;   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;mongod(73870,0x7000107cf000) malloc: *** error for object 0x103d38730: pointer being freed was not allocated&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;*** set a breakpoint in malloc_error_break to debug&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;Process 73870 stopped&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;* thread #2, name = &apos;conn1&apos;, stop reason = signal SIGABRT&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;    frame #0: 0x00007fffc7939d42 libsystem_kernel.dylib`__pthread_kill + 10&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;libsystem_kernel.dylib`__pthread_kill:&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;-&amp;gt;  0x7fffc7939d42 &amp;lt;+10&amp;gt;: jae    0x7fffc7939d4c            ; &amp;lt;+20&amp;gt;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;    0x7fffc7939d44 &amp;lt;+12&amp;gt;: movq   %rax, %rdi&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;    0x7fffc7939d47 &amp;lt;+15&amp;gt;: jmp    0x7fffc7932caf            ; cerror_nocancel&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;    0x7fffc7939d4c &amp;lt;+20&amp;gt;: retq   &lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;Target 0: (mongod) stopped.&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;(lldb) bt&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;* thread #2, name = &apos;conn1&apos;, stop reason = signal SIGABRT&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;  * frame #0: 0x00007fffc7939d42 libsystem_kernel.dylib`__pthread_kill + 10&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;    frame #1: 0x00007fffc7a27457 libsystem_pthread.dylib`pthread_kill + 90&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;    frame #2: 0x00007fffc789f420 libsystem_c.dylib`abort + 129&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;    frame #3: 0x00007fffc798efe7 libsystem_malloc.dylib`free + 530&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;    frame #4: 0x000000010132aa22 mongod`mongo::ListOfMatchExpression::~ListOfMatchExpression(this=0x0000000103d38700) at expression_tree.cpp:42&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;    frame #5: 0x000000010132b7de mongod`mongo::AndMatchExpression::~AndMatchExpression() [inlined] mongo::AndMatchExpression::~AndMatchExpression(this=0x0000000103d38700) at expression_tree.h:112&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
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						&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;   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;    frame #6: 0x000000010132b7d9 mongod`mongo::AndMatchExpression::~AndMatchExpression() [inlined] mongo::AndMatchExpression::~AndMatchExpression(this=0x0000000103d38700) at expression_tree.h:112&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;    frame #7: 0x000000010132b7d9 mongod`mongo::AndMatchExpression::~AndMatchExpression(this=0x0000000103d38700) at expression_tree.h:112&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;    frame #8: 0x000000010132c388 mongod`std::__1::__function::__func&amp;lt;mongo::ListOfMatchExpression::getOptimizer() const::$_0, std::__1::allocator&amp;lt;mongo::ListOfMatchExpression::getOptimizer() const::$_0&amp;gt;, std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt; (std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;)&amp;gt;::operator()(std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;&amp;amp;&amp;amp;) [inlined] std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt;::operator(__ptr=0x0000000103d38700)(mongo::MatchExpression*) const at memory:2397&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;    frame #9: 0x000000010132c382 mongod`std::__1::__function::__func&amp;lt;mongo::ListOfMatchExpression::getOptimizer() const::$_0, std::__1::allocator&amp;lt;mongo::ListOfMatchExpression::getOptimizer() const::$_0&amp;gt;, std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt; (std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;)&amp;gt;::operator()(std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;&amp;amp;&amp;amp;) [inlined] std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;::reset(mongo::MatchExpression*) at memory:2603&lt;/span&gt;&lt;/pre&gt;
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				&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;   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;    frame #10: 0x000000010132c377 mongod`std::__1::__function::__func&amp;lt;mongo::ListOfMatchExpression::getOptimizer() const::$_0, std::__1::allocator&amp;lt;mongo::ListOfMatchExpression::getOptimizer() const::$_0&amp;gt;, std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt; (std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;)&amp;gt;::operator()(std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;&amp;amp;&amp;amp;) [inlined] std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;::~unique_ptr() at memory:2571&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;    frame #11: 0x000000010132c377 mongod`std::__1::__function::__func&amp;lt;mongo::ListOfMatchExpression::getOptimizer() const::$_0, std::__1::allocator&amp;lt;mongo::ListOfMatchExpression::getOptimizer() const::$_0&amp;gt;, std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt; (std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;)&amp;gt;::operator()(std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;&amp;amp;&amp;amp;) [inlined] std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;::~unique_ptr() at memory:2571&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;    frame #12: 0x000000010132c377 mongod`std::__1::__function::__func&amp;lt;mongo::ListOfMatchExpression::getOptimizer() const::$_0, std::__1::allocator&amp;lt;mongo::ListOfMatchExpression::getOptimizer() const::$_0&amp;gt;, std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt; (std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;)&amp;gt;::operator()(std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;&amp;amp;&amp;amp;) [inlined] decltype(std::__1::forward&amp;lt;mongo::ListOfMatchExpression::getOptimizer() const::$_0&amp;amp;&amp;gt;(fp)(std::__1::forward&amp;lt;std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt; &amp;gt;(fp0))) std::__1::__invoke&amp;lt;mongo::ListOfMatchExpression::getOptimizer() const::$_0&amp;amp;, std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt; &amp;gt;(mongo::ListOfMatchExpression::getOptimizer() const::$_0&amp;amp;&amp;amp;&amp;amp;, std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;&amp;amp;&amp;amp;) at type_traits:4291&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    frame #13: 0x000000010132c2c0 mongod`std::__1::__function::__func&amp;lt;mongo::ListOfMatchExpression::getOptimizer() const::$_0, std::__1::allocator&amp;lt;mongo::ListOfMatchExpression::getOptimizer() const::$_0&amp;gt;, std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt; (std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;)&amp;gt;::operator()(std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;&amp;amp;&amp;amp;) [inlined] std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt; std::__1::__invoke_void_return_wrapper&amp;lt;std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt; &amp;gt;::__call&amp;lt;mongo::ListOfMatchExpression::getOptimizer() const::$_0&amp;amp;, std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt; &amp;gt;(mongo::ListOfMatchExpression::getOptimizer() const::$_0&amp;amp;&amp;amp;&amp;amp;, std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;&amp;amp;&amp;amp;) at __functional_base:328&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;    frame #14: 0x000000010132c2c0 mongod`std::__1::__function::__func&amp;lt;mongo::ListOfMatchExpression::getOptimizer() const::$_0, std::__1::allocator&amp;lt;mongo::ListOfMatchExpression::getOptimizer() const::$_0&amp;gt;, std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt; (std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;)&amp;gt;::operator(this=&amp;lt;unavailable&amp;gt;, __arg=&amp;lt;unavailable&amp;gt;)(std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;&amp;amp;&amp;amp;) at functional:1552&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;    frame #15: 0x00000001007eeb18 mongod`mongo::MatchExpression::optimize(std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;) [inlined] std::__1::function&amp;lt;std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt; (std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;)&amp;gt;::operator(this=0x000000010132bfb0)(std::__1::unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt;) const at functional:1911&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;    frame #16: 0x00000001007eeb02 mongod`mongo::MatchExpression::optimize(expression=unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt; @ 0x00007000107cca30) at expression.h:135&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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-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;    frame #17: 0x000000010128c516 mongod`mongo::CanonicalQuery::init(this=0x0000000103d39690, opCtx=0x0000000103d38b50, qr=&amp;lt;unavailable&amp;gt;, canHaveNoopMatchNodes=false, root=unique_ptr&amp;lt;mongo::MatchExpression, std::__1::default_delete&amp;lt;mongo::MatchExpression&amp;gt; &amp;gt; @ 0x00007000107ccac0, collator=unique_ptr&amp;lt;mongo::CollatorInterface, std::__1::default_delete&amp;lt;mongo::CollatorInterface&amp;gt; &amp;gt; @ 0x00007000107ccab8) at canonical_query.cpp:226&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</comment>
                    </comments>
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&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;   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;db.coll.drop();&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;db.coll.insert({});&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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-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;db.coll.find({$and: [{x: 1}, {$expr: { $anyElementTrue: undefined }}]});&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;</customfieldvalue>

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