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    <title>Mojang Studios Jira</title>
    <link>https://bugs.mojang.com</link>
    <description>This file is an XML representation of an issue</description>
    <language>en</language>    <build-info>
        <version>9.12.2</version>
        <build-number>9120002</build-number>
        <build-date>10-01-2024</build-date>
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<item>
            <title>[MC-8340] Comparators do not update their state when blocking or unblocking a chest with a block on top</title>
                <link>https://bugs.mojang.com/browse/MC-8340</link>
                <project id="10400" key="MC">Minecraft: Java Edition</project>
                    <description>&lt;p&gt;I found this bug where comparators dont output any signal from a chest, when the chest has a block on top. I&apos;m not sure if it&apos;s intended, but I thought I might as well post it. It allows for a cool clock like in the third screenshot, However the clock creates major lag spikes on servers after 1 minute or so, more lag than it should.&lt;br/&gt;
Since I don&apos;t seem to be able to upload screenshots, I uploaded them to imgur:&lt;br/&gt;
&lt;a href=&quot;http://imgur.com/advoWtp&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://imgur.com/advoWtp&lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;http://imgur.com/Fyh17O0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://imgur.com/Fyh17O0&lt;/a&gt;&lt;br/&gt;
&lt;a href=&quot;http://imgur.com/9q6GdZb&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://imgur.com/9q6GdZb&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="21258">MC-8340</key>
            <summary>Comparators do not update their state when blocking or unblocking a chest with a block on top</summary>
                <type id="1" iconUrl="https://bugs.mojang.com/secure/viewavatar?size=xsmall&amp;avatarId=18903&amp;avatarType=issuetype">Bug</type>
                                    <status id="4" iconUrl="https://bugs.mojang.com/images/icons/statuses/reopened.png" description="This issue was once resolved, but the resolution was deemed incorrect. From here issues are either marked assigned or resolved.">Reopened</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="dicotheredstoner">DicoTheRedstoner</reporter>
                        <labels>
                    </labels>
                <created>Fri, 25 Jan 2013 16:49:35 +0100</created>
                <updated>Wed, 21 Aug 2024 10:20:01 +0200</updated>
                                            <version>Snapshot 13w04a</version>
                    <version>Snapshot 13w07a</version>
                    <version>Snapshot 13w10b</version>
                    <version>Minecraft 1.5</version>
                    <version>Snapshot 13w11a</version>
                    <version>Minecraft 1.6.1</version>
                    <version>Minecraft 1.6.2</version>
                    <version>Minecraft 1.7.4</version>
                    <version>Minecraft 14w02c</version>
                    <version>Minecraft 14w03b</version>
                    <version>Minecraft 14w04a</version>
                    <version>Minecraft 14w04b</version>
                    <version>Minecraft 14w05a</version>
                    <version>Minecraft 14w05b</version>
                    <version>Minecraft 1.8.1</version>
                    <version>Minecraft 1.8.2-pre6</version>
                    <version>Minecraft 15w40b</version>
                    <version>Minecraft 1.10.2</version>
                    <version>Minecraft 16w38a</version>
                    <version>Minecraft 1.11.2</version>
                    <version>Minecraft 1.13-pre6</version>
                    <version>Minecraft 1.13-pre7</version>
                    <version>1.15.2</version>
                    <version>20w21a</version>
                    <version>1.16.1</version>
                    <version>1.16.2 Pre-release 1</version>
                    <version>1.16.2 Release Candidate 1</version>
                    <version>1.16.2</version>
                    <version>1.16.3 Release Candidate 1</version>
                    <version>1.16.3</version>
                    <version>20w48a</version>
                    <version>1.20.4</version>
                                    <fixVersion>Snapshot 13w05a</fixVersion>
                                                        <votes>20</votes>
                                    <watches>10</watches>
                                                                            <comments>
                            <comment id="854147" author="JIRAUSER566325" created="Tue, 1 Dec 2020 18:42:35 +0100"  >&lt;p&gt;Can confirm in 20w48a.&lt;/p&gt;</comment>
                            <comment id="787181" author="darth cobby" created="Fri, 14 Aug 2020 12:39:15 +0200"  >&lt;p&gt;&lt;a href=&quot;https://bugs.mojang.com/secure/ViewProfile.jspa?name=moosefreak&quot; class=&quot;user-hover&quot; rel=&quot;moosefreak&quot;&gt;moosefreak&lt;/a&gt;, that is &lt;a href=&quot;https://bugs.mojang.com/browse/MC-100302&quot; title=&quot;Comparators don&amp;#39;t give output of blocked chest&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-100302&quot;&gt;MC-100302&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="768072" author="moosefreak" created="Sun, 19 Jul 2020 11:09:59 +0200"  >&lt;p&gt;Still an issue in 1.16.1, items can go into a chest via hoppers when a block is on top, but items can&apos;t be detected inside a chest when a block is on top.&lt;/p&gt;</comment>
                            <comment id="703322" author="darth cobby" created="Thu, 21 May 2020 19:59:40 +0200"  >&lt;p&gt;Confirmed in 1.15.2 and 20w21a.&lt;/p&gt;</comment>
                            <comment id="334840" author="farogaming" created="Thu, 13 Oct 2016 15:45:34 +0200"  >&lt;p&gt;Is this now WAI because hoppers also can&apos;t interact with blocked chests?&lt;/p&gt;</comment>
                            <comment id="217881" author="kingsupernova" created="Mon, 2 Feb 2015 12:21:58 +0100"  >&lt;p&gt;Please don&apos;t repeat the horrible mistake of &lt;a href=&quot;https://bugs.mojang.com/browse/MC-108&quot; title=&quot;Droppers, Dispensers and Pistons activate when blocks are providing power diagonally or two blocks above&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-108&quot;&gt;&lt;del&gt;MC-108&lt;/del&gt;&lt;/a&gt; and leave this extremely glitchy behavior in the game just because a few people find it useful. Bugs should be fixed, not left in the game to confuse and irritate every player that tries to build something. There are already enough inconsistent behaviors in the game, as more and more start to accumulate, the game will eventually become unplayable. It&apos;s just not worth it.&lt;/p&gt;</comment>
                            <comment id="217520" author="yut951121" created="Fri, 30 Jan 2015 18:50:09 +0100"  >&lt;p&gt;This is still in 1.8.2-pre6, but fixing this bug would be very sad because lot of contraptions already made use of this&lt;/p&gt;</comment>
                            <comment id="205242" author="galaxy_2alex" created="Sat, 25 Oct 2014 11:57:36 +0200"  >&lt;p&gt;Is this still a concern in the &lt;em&gt;current Minecraft version&lt;/em&gt; &lt;b&gt;1.8.1 Prerelease 3&lt;/b&gt; / Launcher version &lt;b&gt;1.5.3&lt;/b&gt; or later? If so, please &lt;em&gt;update the affected versions&lt;/em&gt; in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.&lt;/p&gt;</comment>
                            <comment id="146340" author="dicotheredstoner" created="Tue, 11 Mar 2014 23:35:02 +0100"  >&lt;p&gt;This turned out to be a really useful &apos;bug&apos; so how about not fixing it and resolving it as &apos;works as intended&apos; &lt;img class=&quot;emoticon&quot; src=&quot;https://bugs.mojang.com/images/icons/emoticons/biggrin.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/p&gt;</comment>
                            <comment id="55117" author="mrtea99" created="Mon, 18 Mar 2013 19:16:45 +0100"  >&lt;p&gt;Still occurring in 13w11a&lt;/p&gt;</comment>
                            <comment id="46194" author="grygrflzr" created="Sun, 17 Feb 2013 04:26:14 +0100"  >&lt;p&gt;Confirmed to still occur on 13w07a with all block updates (not just redstone). Reopened.&lt;/p&gt;</comment>
                            <comment id="46157" author="randalonel" created="Sun, 17 Feb 2013 00:07:19 +0100"  >&lt;p&gt;This issue has not been fixed as of 13w07a.  My set-up is shown in two new pictures. The chest is half-full so the comparator should be lit, which it is when the chest is not blocked from opening.  Next I place a block above the chest and the comparator remains on. But if I force the comparator to update by momentarily applying a signal to it&apos;s side the lights go off and stay off. When I remove the block above the chest the comparator output remains off until I either push the button again or simply open and close the chest; then the comparator lights up again.   Because of the long redstone path, pushing the button when the chest is not blocked makes no difference because the low signal strength from the button is less than the signal from the half-full chest. Pushing the button only serves to force the comparator to update.  (The screenshot from 05/Feb/13 makes it appear that the problem was fixed but it might simply be that the comparator has not updated.)&lt;/p&gt;</comment>
                            <comment id="43884" author="mustek" created="Wed, 6 Feb 2013 00:24:25 +0100"  >&lt;p&gt;It seems like this has been fixed, see the new screenshot.&lt;/p&gt;</comment>
                            <comment id="39834" author="dicotheredstoner" created="Fri, 25 Jan 2013 20:57:29 +0100"  >&lt;p&gt;thanks ^^&lt;/p&gt;</comment>
                            <comment id="39783" author="grygrflzr" created="Fri, 25 Jan 2013 17:20:26 +0100"  >&lt;p&gt;Attached screenshots to issue.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10102">
                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="75433">MC-49652</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="549755">MC-268154</issuekey>
        </issuelink>
                            </inwardlinks>
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                            <issuelinktype id="10103">
                    <name>Relates</name>
                                            <outwardlinks description="relates to">
                                        <issuelink>
            <issuekey id="182796">MC-120986</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="relates to">
                                        <issuelink>
            <issuekey id="48670">MC-28479</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="138454">MC-100302</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="25573">MC-11434</issuekey>
        </issuelink>
                            </inwardlinks>
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                <attachments>
                            <attachment id="21158" name="2013-02-06_00.23.02.png" size="406354" author="mustek" created="Wed, 6 Feb 2013 00:23:48 +0100"/>
                            <attachment id="21930" name="Chest not empty Blocked.png" size="537413" author="randalonel" created="Sat, 16 Feb 2013 23:58:48 +0100"/>
                            <attachment id="21929" name="Chest not empty.png" size="606401" author="randalonel" created="Sat, 16 Feb 2013 23:57:27 +0100"/>
                            <attachment id="19778" name="With Block.jpg" size="68171" author="grygrflzr" created="Fri, 25 Jan 2013 17:19:57 +0100"/>
                            <attachment id="19777" name="Without Block.jpg" size="61281" author="grygrflzr" created="Fri, 25 Jan 2013 17:19:15 +0100"/>
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