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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>
    </build-info>


<item>
            <title>[SERVER-53828] Fix unsequenced modifications in oplog_applier_impl_test.cpp</title>
                <link>https://jira.mongodb.org/browse/SERVER-53828</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Building on XCode clang:&lt;br/&gt;
Apple clang version 12.0.0 (clang-1200.0.32.28)&lt;br/&gt;
Target: x86_64-apple-darwin20.2.0&lt;br/&gt;
Thread model: posix&lt;br/&gt;
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin&lt;/p&gt;

&lt;p&gt;oplog_applier_impl_test.cpp:1620:78: error: unsequenced modification and access to &apos;seconds&apos; &lt;span class=&quot;error&quot;&gt;&amp;#91;-Werror,-Wunsequenced&amp;#93;&lt;/span&gt;&lt;/p&gt;

&lt;p&gt;Occurs in 4 places.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1592326">SERVER-53828</key>
            <summary>Fix unsequenced modifications in oplog_applier_impl_test.cpp</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="billy.donahue@mongodb.com">Billy Donahue</assignee>
                                    <reporter username="billy.donahue@mongodb.com">Billy Donahue</reporter>
                        <labels>
                    </labels>
                <created>Fri, 15 Jan 2021 16:25:34 +0000</created>
                <updated>Sun, 29 Oct 2023 21:58:46 +0000</updated>
                            <resolved>Fri, 22 Jan 2021 02:20:00 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                    <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="3577035" author="xgen-internal-githook" created="Fri, 22 Jan 2021 00:44:56 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Billy Donahue&apos;, &apos;email&apos;: &apos;billy.donahue@mongodb.com&apos;, &apos;username&apos;: &apos;BillyDonahue&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-53828&quot; title=&quot;Fix unsequenced modifications in oplog_applier_impl_test.cpp&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-53828&quot;&gt;&lt;del&gt;SERVER-53828&lt;/del&gt;&lt;/a&gt; fix unsequenced operations in 2 tests&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2124bf2d0f31bc21af6f3104a9025c2da8b9e14b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2124bf2d0f31bc21af6f3104a9025c2da8b9e14b&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3568056" author="billy.donahue" created="Fri, 15 Jan 2021 19:26:12 +0000"  >&lt;p&gt;CR &lt;a href=&quot;https://mongodbcr.appspot.com/740880039&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://mongodbcr.appspot.com/740880039&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3568050" author="billy.donahue" created="Fri, 15 Jan 2021 19:25:06 +0000"  >&lt;p&gt;I think changing the Duration constructor to take the count by value instead of by reference exposed this bug.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/mongodb/mongo/blob/master/src/mongo/db/repl/oplog_applier_impl_test.cpp#L1620&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/master/src/mongo/db/repl/oplog_applier_impl_test.cpp#L1620&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;There are a few places in the test that do this pattern:&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;    int seconds = 1;&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;    auto makeOp = [&amp;amp;seconds](const NamespaceString&amp;amp; nss) {&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;        return makeInsertDocumentOplogEntry(&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;            {Timestamp(Seconds(seconds), 0), 1LL}, nss, BSON(&quot;_id&quot; &amp;lt;&amp;lt; seconds++));&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&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;   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;    };&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;And it&apos;s indeterminate whether &lt;tt&gt;Seconds(seconds)&lt;/tt&gt; is executed before or after the &lt;tt&gt;seconds++&lt;/tt&gt;.&lt;/p&gt;



&lt;p&gt;PS: I&apos;m also throwing in another XCode warning-made-error having to do with an unnecessary loop variable copy.&lt;br/&gt;
Doing both of these clears my build.&lt;/p&gt;</comment>
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