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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>[SERVER-55066] maybe-uninitialized warning in timelib</title>
                <link>https://jira.mongodb.org/browse/SERVER-55066</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I saw this on gcc-10 when compiling with &lt;tt&gt;-O3&lt;/tt&gt;. It doesn&apos;t show up with &lt;tt&gt;-O2&lt;/tt&gt;, probably due to less aggressive inlining not making it visible to the compiler.&lt;/p&gt;

&lt;p/&gt;
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					&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;src/third_party/timelib-2018.01/parse_tz.c:677:24: error: &apos;transition_time&apos; may be used uninitialized in this function [-Werror=maybe-uninitialized]&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;It seems like a valid warning since `transition_time` won&apos;t be initialized if this return path is taken &lt;a href=&quot;https://github.com/mongodb/mongo/blob/144e0d0f355dd5ec13a1aa135a1f59a90d234aa5/src/third_party/timelib-2018.01/parse_tz.c#L622&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/144e0d0f355dd5ec13a1aa135a1f59a90d234aa5/src/third_party/timelib-2018.01/parse_tz.c#L622&lt;/a&gt;. Initializing to 0 at &lt;a href=&quot;https://github.com/mongodb/mongo/blob/144e0d0f355dd5ec13a1aa135a1f59a90d234aa5/src/third_party/timelib-2018.01/parse_tz.c#L671&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/144e0d0f355dd5ec13a1aa135a1f59a90d234aa5/src/third_party/timelib-2018.01/parse_tz.c#L671&lt;/a&gt; seems to silence the warning.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1644594">SERVER-55066</key>
            <summary>maybe-uninitialized warning in timelib</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="13203">Gone away</resolution>
                                        <assignee username="mohammad.dashti@mongodb.com">Mohammad Dashti</assignee>
                                    <reporter username="mathias@mongodb.com">Mathias Stearn</reporter>
                        <labels>
                    </labels>
                <created>Tue, 9 Mar 2021 16:54:27 +0000</created>
                <updated>Fri, 27 Oct 2023 20:46:11 +0000</updated>
                            <resolved>Mon, 24 May 2021 17:34:25 +0000</resolved>
                                                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3819940" author="JIRAUSER1259138" created="Mon, 24 May 2021 20:39:08 +0000"  >&lt;p&gt;Thanks David for fixing the label to the correct one.&lt;/p&gt;</comment>
                            <comment id="3818995" author="david.storch" created="Mon, 24 May 2021 17:34:25 +0000"  >&lt;p&gt;I have changed the resolution to &quot;Gone Away&quot; rather than &quot;Fixed&quot;, since there are no commits to the code base against this ticket.&lt;/p&gt;</comment>
                            <comment id="3777496" author="JIRAUSER1259138" created="Mon, 17 May 2021 17:05:37 +0000"  >&lt;p&gt;Thanks &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=redbeard0531&quot; class=&quot;user-hover&quot; rel=&quot;redbeard0531&quot;&gt;redbeard0531&lt;/a&gt; for reporting this and &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=acm&quot; class=&quot;user-hover&quot; rel=&quot;acm&quot;&gt;acm&lt;/a&gt; for double-checking it.&#160;&lt;/p&gt;

&lt;p&gt;This issue does not exist in the latest version of &lt;tt&gt;timelib&lt;/tt&gt;, which is already upgraded via &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-56371&quot; title=&quot;Upgrade timelib to 2021.06&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-56371&quot;&gt;&lt;del&gt;SERVER-56371&lt;/del&gt;&lt;/a&gt;. In this version,&#160;The code paths in master (and the latest&#160;&lt;tt&gt;2021.06&lt;/tt&gt;) don&apos;t have this, and in every case it is setting the &lt;tt&gt;transition_time&lt;/tt&gt; to something:&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/blob/61f662b283f983f8c498a7a5e4c0e8348b452e4d/src/third_party/timelib-2021.06/parse_tz.c#L808&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/61f662b283f983f8c498a7a5e4c0e8348b452e4d/src/third_party/timelib-2021.06/parse_tz.c#L808&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3754115" author="JIRAUSER1257467" created="Tue, 4 May 2021 14:36:16 +0000"  >&lt;p&gt;Query will verify is this issue still exist in the latest version&#160;&lt;/p&gt;</comment>
                            <comment id="3663310" author="acm" created="Sat, 13 Mar 2021 20:48:03 +0000"  >&lt;p&gt;I just encountered this with toolchain v3 while evaluating &lt;tt&gt;&amp;#45;O3&lt;/tt&gt; for &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-55133&quot; title=&quot;Evaluate impact of building with -O3&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-55133&quot;&gt;&lt;del&gt;SERVER-55133&lt;/del&gt;&lt;/a&gt; as well, so it isn&apos;t just newer GCC.&lt;/p&gt;</comment>
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