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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-5227] Updates fail when zero-length keys exist</title>
                <link>https://jira.mongodb.org/browse/SERVER-5227</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This was reported in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-2051&quot; title=&quot;Disallow empty string keys &quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-2051&quot;&gt;SERVER-2051&lt;/a&gt;, but appears to be a bug of its own (although the problem might be masked if the change in that ticket was made):&lt;/p&gt;

&lt;p&gt;&amp;gt; db.left.insert(&lt;/p&gt;
{field1: &quot;whatever&quot;, &quot;&quot;: null}
&lt;p&gt;)&lt;br/&gt;
&amp;gt; db.left.update(&lt;/p&gt;
{&quot;field1&quot;: &quot;whatever&quot;}
&lt;p&gt;, {$set: {&quot;field2&quot;: &quot;test&quot;}}, false, true)&lt;br/&gt;
LEFT_SUBFIELD only supports Object:  not: 10&lt;/p&gt;

&lt;p&gt;On a quick look at the source, it looks like the result of compareDottedFieldNames is incorrect when r is the null string.&lt;/p&gt;

&lt;p&gt;Probably related:&lt;/p&gt;

&lt;p&gt;&amp;gt; db.left.insert(&lt;/p&gt;
{field1: &quot;whatever&quot;}
&lt;p&gt;)&lt;br/&gt;
&amp;gt; db.left.update(&lt;/p&gt;
{&quot;field1&quot;: &quot;whatever&quot;}
&lt;p&gt;, {$set: {&quot;&quot;: &quot;test&quot;}}, false, true)&lt;br/&gt;
ModSet::createNewFromMods - RIGHT_SUBFIELD should be impossible&lt;/p&gt;</description>
                <environment></environment>
        <key id="32374">SERVER-5227</key>
            <summary>Updates fail when zero-length keys exist</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="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="glenn">Glenn Maynard</reporter>
                        <labels>
                            <label>update</label>
                    </labels>
                <created>Tue, 6 Mar 2012 21:11:27 +0000</created>
                <updated>Fri, 9 Mar 2012 21:07:36 +0000</updated>
                            <resolved>Thu, 8 Mar 2012 22:18:40 +0000</resolved>
                                    <version>2.0.3</version>
                                                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="96977" author="glenn" created="Thu, 8 Mar 2012 22:07:32 +0000"  >&lt;p&gt;Looks like it works.  I&apos;ll leave a note in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-2051&quot; title=&quot;Disallow empty string keys &quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-2051&quot;&gt;SERVER-2051&lt;/a&gt; as well.  (I can&apos;t find how to close this bug.  Surely reporters can close their own tickets?)&lt;/p&gt;</comment>
                            <comment id="96062" author="milkie" created="Tue, 6 Mar 2012 21:28:16 +0000"  >&lt;p&gt;Hi Glenn.&lt;br/&gt;
Does the code fix in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-2651&quot; title=&quot;update breaks with blank field name&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-2651&quot;&gt;&lt;del&gt;SERVER-2651&lt;/del&gt;&lt;/a&gt; help here?&lt;/p&gt;</comment>
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