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    <language>en-us</language>    <build-info>
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        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-28941] MatchExpressionWhere can discard errors when it&apos;s shallowCloned</title>
                <link>https://jira.mongodb.org/browse/SERVER-28941</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This was uncovered by BF-3588:&lt;/p&gt;

&lt;p/&gt;
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					&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;[ReplicaSetFixture:job15:primary] 2017-03-16T17:57:56.018+0000 I COMMAND  [conn36] command test.max_time_ms appName: &quot;MongoDB Shell&quot; command: find { find: &quot;max_time_ms&quot;, filter: { $where: function () {&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;[ReplicaSetFixture:job15:primary]         if (this.slow) {&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;[ReplicaSetFixture:job15:primary]             sleep(2 * 1000);&lt;/span&gt;&lt;/pre&gt;
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		&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;[ReplicaSetFixture:job15:primary]   ... }, batchSize: 3.0, maxTimeMS: 2000.0 } planSummary: COLLSCAN exception: $where compile error code:28692 numYields:0 reslen:191 locks:{ Global: { acquireCount: { r: 6 } }, MMAPV1Journal: { acquireCount: { r: 2 } }, Database: { acquireCount: { r: 3 } }, Collection: { acquireCount: { R: 3 } } } protocol:op_command 2269ms&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[js_test:max_time_ms] 2017-03-16T17:57:56.073+0000 	&quot;operationTime&quot; : Timestamp(1489687073, 17),&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[js_test:max_time_ms] 2017-03-16T17:57:56.077+0000 	&quot;ok&quot; : 0,&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;[js_test:max_time_ms] 2017-03-16T17:57:56.078+0000 	&quot;errmsg&quot; : &quot;$where compile error&quot;,&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&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;[js_test:max_time_ms] 2017-03-16T17:57:56.078+0000 	&quot;code&quot; : 28692,&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&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;[js_test:max_time_ms] 2017-03-16T17:57:56.079+0000 	&quot;codeName&quot; : &quot;Location28692&quot;&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&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;[js_test:max_time_ms] 2017-03-16T17:57:56.080+0000 } : expected batch 1 (query) to not hit the time limit&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;[js_test:max_time_ms] 2017-03-16T17:57:56.080+0000 doassert@src/mongo/shell/assert.js:18:14&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;[js_test:max_time_ms] 2017-03-16T17:57:56.080+0000 assert.doesNotThrow@src/mongo/shell/assert.js:363:13&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;[js_test:max_time_ms] 2017-03-16T17:57:56.081+0000 @jstests/core/max_time_ms.js:363:1&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;p/&gt;

&lt;p&gt;The failure is a uassert failure that happens at the top of &lt;tt&gt;bool WhereMatchExpression::matches(const MatchableDocument* doc, MatchDetails* details)&lt;/tt&gt;, which is after the javascript function is actually compiled in &lt;tt&gt;Status WhereMatchExpression::init(StringData dbName)&lt;/tt&gt;.&lt;/p&gt;

&lt;p&gt;In &lt;tt&gt;Status WhereMatchExpression::init(StringData dbName)&lt;/tt&gt;, if the javascript engine actually failed to compile the function, I think you&apos;d get a javascript-specific error code rather than &quot;$where compile error&quot;. In fact, I can&apos;t see a way for you to ever have &lt;tt&gt;_func == 0&lt;/tt&gt; unless init had failed and its error silently discarded.&lt;/p&gt;

&lt;p&gt;The only place that we call init and silently discard its error is in the &lt;tt&gt;unique_ptr&amp;lt;MatchExpression&amp;gt; WhereMatchExpression::shallowClone()&lt;/tt&gt; function.&lt;/p&gt;</description>
                <environment></environment>
        <key id="376933">SERVER-28941</key>
            <summary>MatchExpressionWhere can discard errors when it&apos;s shallowCloned</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="jonathan.reams@mongodb.com">Jonathan Reams</assignee>
                                    <reporter username="jonathan.reams@mongodb.com">Jonathan Reams</reporter>
                        <labels>
                    </labels>
                <created>Mon, 24 Apr 2017 15:25:59 +0000</created>
                <updated>Mon, 30 Oct 2023 23:17:15 +0000</updated>
                            <resolved>Mon, 1 May 2017 15:58:48 +0000</resolved>
                                                    <fixVersion>3.5.7</fixVersion>
                                    <component>JavaScript</component>
                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1561474" author="xgen-internal-githook" created="Mon, 1 May 2017 15:58:28 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;jbreams&apos;, u&apos;name&apos;: u&apos;Jonathan Reams&apos;, u&apos;email&apos;: u&apos;jbreams@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28941&quot; title=&quot;MatchExpressionWhere can discard errors when it&amp;#39;s shallowCloned&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28941&quot;&gt;&lt;del&gt;SERVER-28941&lt;/del&gt;&lt;/a&gt; MatchExpressionWhere can discard errors when it&apos;s shallowCloned&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8665131a118e9515fc18ba0d41dcc773874f1529&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8665131a118e9515fc18ba0d41dcc773874f1529&lt;/a&gt;&lt;/p&gt;</comment>
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