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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>
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<item>
            <title>[CSHARP-3687] Fixing legacy LINQ tests on latest </title>
                <link>https://jira.mongodb.org/browse/CSHARP-3687</link>
                <project id="10041" key="CSHARP">C# Driver</project>
                    <description>&lt;p&gt;Lately, some of legacy linq tests started to fail: &lt;a href=&quot;https://evergreen.mongodb.com/task_log_raw/dot_net_driver_secure_tests__version~latest_os~windows_64_topology~standalone_auth~auth_ssl~ssl_test_net452_patch_5f4dafd4db327e15fd957d68f5f3e5188f681197_60aca6ded6d80a7ef55073e3_21_05_25_07_27_27/0?type=T#L1589&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://evergreen.mongodb.com/task_log_raw/dot_net_driver_secure_tests__version~latest_os~windows_64_topology~standalone_auth~auth_ssl~ssl_test_net452_patch_5f4dafd4db327e15fd957d68f5f3e5188f681197_60aca6ded6d80a7ef55073e3_21_05_25_07_27_27/0?type=T#L1589&lt;/a&gt;. &lt;br/&gt;
Apparently something was changed on the server side since now tests can return more records than before (in one of tests that I checked, previously we return 4 documents, but now we have 5). This behavior was introduced recently so we should clarify the reason for this&lt;/p&gt;</description>
                <environment></environment>
        <key id="1756361">CSHARP-3687</key>
            <summary>Fixing legacy LINQ tests on latest </summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="10300" iconUrl="https://jira.mongodb.org/images/icons/priorities/medium.svg">Unknown</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="robert@mongodb.com">Robert Stam</assignee>
                                    <reporter username="dmitry.lukyanov@mongodb.com">Dmitry Lukyanov</reporter>
                        <labels>
                    </labels>
                <created>Tue, 25 May 2021 14:02:50 +0000</created>
                <updated>Thu, 12 Aug 2021 14:52:35 +0000</updated>
                            <resolved>Thu, 12 Aug 2021 14:52:35 +0000</resolved>
                                                                    <component>Linq</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="3949537" author="jeff.yemin" created="Mon, 19 Jul 2021 14:41:04 +0000"  >&lt;p&gt;Probably can just close this &lt;/p&gt;</comment>
                            <comment id="3848679" author="james.kovacs" created="Fri, 28 May 2021 22:55:58 +0000"  >&lt;p&gt;The other test failures on 5.0-rc0 are variations on the above theme but performing a regex on an element in an array such as:&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;db.people.find({&quot;a.0&quot;: {$not: /^T/}})&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;db.people.find({&quot;a.0&quot;: {$not: /m$/}})&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;db.people.find({&quot;a.0&quot;: {$not: /o/s}})&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>
                            <comment id="3848666" author="james.kovacs" created="Fri, 28 May 2021 22:30:21 +0000"  >&lt;p&gt;This appears to be a bug introduced in MongoDB 5.0. Details are in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-57300&quot; title=&quot;{$exists:false} on array elements returns incorrect results on MongoDB 5.0&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-57300&quot;&gt;&lt;del&gt;SERVER-57300&lt;/del&gt;&lt;/a&gt;. The short version is that &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;   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;&quot;_t.0&quot;: { $exists: false}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt; now returns incorrect results.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10010">
                    <name>Duplicate</name>
                                            <outwardlinks description="duplicates">
                                        <issuelink>
            <issuekey id="1767705">CSHARP-3704</issuekey>
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                            <issuelinktype id="10520">
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                                                                <inwardlinks description="is caused by">
                                        <issuelink>
            <issuekey id="1761498">SERVER-57300</issuekey>
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            <issuekey id="1767705">CSHARP-3704</issuekey>
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