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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>[SERVER-40343] Better handling of errors from PCRE in $regex expressions</title>
                <link>https://jira.mongodb.org/browse/SERVER-40343</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;During $regex* aggregate expression evaluation, errors thrown by &apos;pcre_exec&apos; are not propagated. It might be incorrect in some cases when error was thrown because of a threshold breach.&lt;/p&gt;</description>
                <environment></environment>
        <key id="723459">SERVER-40343</key>
            <summary>Better handling of errors from PCRE in $regex expressions</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="arun.banala@mongodb.com">Arun Banala</assignee>
                                    <reporter username="arun.banala@mongodb.com">Arun Banala</reporter>
                        <labels>
                    </labels>
                <created>Tue, 26 Mar 2019 18:06:39 +0000</created>
                <updated>Sun, 29 Oct 2023 22:22:36 +0000</updated>
                            <resolved>Mon, 1 Apr 2019 14:50:06 +0000</resolved>
                                                    <fixVersion>4.1.9</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2197706" author="xgen-internal-githook" created="Mon, 1 Apr 2019 14:46:41 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;arun.banala@mongodb.com&apos;, &apos;name&apos;: &apos;Arun Banala&apos;, &apos;username&apos;: &apos;banarun&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40343&quot; title=&quot;Better handling of errors from PCRE in $regex expressions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40343&quot;&gt;&lt;del&gt;SERVER-40343&lt;/del&gt;&lt;/a&gt; Better handling of errors from PCRE in $regex expressions&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/1d8ddd2d2d480bc0b840b506c3630c82be8c09a2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/1d8ddd2d2d480bc0b840b506c3630c82be8c09a2&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2193151" author="arun.banala" created="Wed, 27 Mar 2019 14:23:33 +0000"  >&lt;p&gt;Agreed. We will only change $regex agg expressions to throw errors.&#160;&lt;/p&gt;</comment>
                            <comment id="2193080" author="david.storch" created="Wed, 27 Mar 2019 13:59:49 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=arun.banala&quot; class=&quot;user-hover&quot; rel=&quot;arun.banala&quot;&gt;arun.banala&lt;/a&gt; &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=bernard.gorman&quot; class=&quot;user-hover&quot; rel=&quot;bernard.gorman&quot;&gt;bernard.gorman&lt;/a&gt;, to clarify: do you intend to change both the $regex* agg expressions and the $regex match expression to throw in this case? I don&apos;t think we should change the $regex match expression&apos;s behavior, since, with the exception of &lt;tt&gt;$expr&lt;/tt&gt;, match expressions do not throw runtime errors.&lt;/p&gt;</comment>
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                                                                <inwardlinks description="is related to">
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            <issuekey id="627175">SERVER-37848</issuekey>
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