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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>[SERVER-398] Having leading comments in Javascript can break db.eval()</title>
                <link>https://jira.mongodb.org/browse/SERVER-398</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This works:&lt;/p&gt;

&lt;p&gt;&amp;gt; db.eval(/&lt;b&gt;dieinafire&lt;/b&gt;/function()&lt;/p&gt;
{return [true];})&lt;br/&gt;
&lt;span class=&quot;error&quot;&gt;&amp;#91;true&amp;#93;&lt;/span&gt;&lt;br/&gt;
&lt;br/&gt;
As does this:&lt;br/&gt;
&lt;br/&gt;
&amp;gt; db.eval(&quot;function(){return [true];}
&lt;p&gt;&quot;)&lt;br/&gt;
&lt;span class=&quot;error&quot;&gt;&amp;#91;true&amp;#93;&lt;/span&gt;&lt;/p&gt;

&lt;p&gt;Starting with a string with a comment does not:&lt;/p&gt;

&lt;p&gt;&amp;gt; db.eval(&quot;/&lt;b&gt;dieinafire&lt;/b&gt;/function()&lt;/p&gt;
{return [true];}
&lt;p&gt;&quot;)&lt;br/&gt;
null&lt;/p&gt;

&lt;p&gt;mstearn in #mongodb said:&lt;/p&gt;

&lt;p&gt;&amp;lt; mstearn&amp;gt; yup, function literal vs sting with function&lt;/p&gt;

&lt;p&gt;So I guess this is a known behavior.  However, it&apos;s completely non-&lt;br/&gt;
obvious when you run into it via a client library.&lt;/p&gt;

&lt;p&gt;Is there a way to db.eval() javascript code that starts with a comment&lt;br/&gt;
via pymongo?&lt;/p&gt;

&lt;p&gt;Obviously for now I&apos;ve just removed the comment, but I wasted an&lt;br/&gt;
afternoon trying to figure out why in the world some perfectly valid&lt;br/&gt;
Javascript wasn&apos;t executing.&lt;/p&gt;

&lt;p&gt;Thanks,&lt;br/&gt;
schmichael&lt;/p&gt;</description>
                <environment></environment>
        <key id="10824">SERVER-398</key>
            <summary>Having leading comments in Javascript can break db.eval()</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="eliot">Eliot Horowitz</assignee>
                                    <reporter username="eliot">Eliot Horowitz</reporter>
                        <labels>
                    </labels>
                <created>Fri, 30 Oct 2009 20:50:01 +0000</created>
                <updated>Tue, 12 Jul 2016 00:29:09 +0000</updated>
                            <resolved>Tue, 10 Nov 2009 13:40:49 +0000</resolved>
                                                    <fixVersion>1.1.4</fixVersion>
                                    <component>JavaScript</component>
                                        <votes>1</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="11116" author="auto" created="Tue, 10 Nov 2009 13:40:46 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Eliot Horowitz&apos;, &apos;email&apos;: &apos;eliot@10gen.com&apos;}
&lt;p&gt;Message: handle comments at the beginning of code &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-398&quot; title=&quot;Having leading comments in Javascript can break db.eval()&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-398&quot;&gt;&lt;del&gt;SERVER-398&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;http://github.com/mongodb/mongo/commit/8af511ef9b8fab64893960b776b3682de6fb7932&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://github.com/mongodb/mongo/commit/8af511ef9b8fab64893960b776b3682de6fb7932&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="11046" author="schmichael" created="Mon, 2 Nov 2009 17:04:01 +0000"  >&lt;p&gt;Wrapping my code in a pymongo.code.Code() object allows me to start with a comment.  Perhaps a leading comment only breaks the data_code BSON type and not the data_code_w_scope type?&lt;/p&gt;</comment>
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