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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-3905] Piston powered by block being pushed vertically</title>
                <link>https://bugs.mojang.com/browse/MC-3905</link>
                <project id="10400" key="MC">Minecraft: Java Edition</project>
                    <description>&lt;p&gt;I did some testing and it appears that in 1.4.5. the block that a piston pushes upwards also powers the piston, so this locks it in place permanently.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;What I expected to happen was...:&lt;/b&gt;&lt;br/&gt;
The piston would retract.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;What actually happened was...:&lt;/b&gt;&lt;br/&gt;
It did not.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Steps to Reproduce:&lt;/b&gt;&lt;br/&gt;
1. Place a piston facing upwards (either kind)&lt;br/&gt;
2. place a block on the piston&lt;br/&gt;
3. power the piston a constant source (torch, lever)&lt;br/&gt;
4. place a lever on the block extended by the piston and turn it on.&lt;br/&gt;
5. Turn off the source directly powering the piston.&lt;/p&gt;


</description>
                <environment>Windows Vista</environment>
        <key id="16156">MC-3905</key>
            <summary>Piston powered by block being pushed vertically</summary>
                <type id="1" iconUrl="https://bugs.mojang.com/secure/viewavatar?size=xsmall&amp;avatarId=18903&amp;avatarType=issuetype">Bug</type>
                                    <status id="5" iconUrl="https://bugs.mojang.com/images/icons/statuses/resolved.png" description="A resolution has been taken, and it is awaiting verification by reporter. From here issues are either reopened, or are closed.">Resolved</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="afrothoz">Thoryn Haylett</reporter>
                        <labels>
                            <label>piston</label>
                            <label>redstone</label>
                    </labels>
                <created>Tue, 27 Nov 2012 21:34:00 +0100</created>
                <updated>Sat, 1 Jun 2013 16:27:34 +0200</updated>
                            <resolved>Tue, 18 Dec 2012 21:42:20 +0100</resolved>
                                    <version>Minecraft 1.4.5</version>
                                                                        <votes>1</votes>
                                    <watches>2</watches>
                                                                            <comments>
                            <comment id="29360" author="bljat" created="Tue, 18 Dec 2012 21:42:20 +0100"  >&lt;p&gt;Ok resolving as duplicate 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;, thanks for the info &lt;img class=&quot;emoticon&quot; src=&quot;https://bugs.mojang.com/images/icons/emoticons/smile.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="29359" author="blueravengt" created="Tue, 18 Dec 2012 21:40:35 +0100"  >&lt;p&gt;Correct.&lt;/p&gt;</comment>
                            <comment id="29354" author="bljat" created="Tue, 18 Dec 2012 21:22:55 +0100"  >&lt;p&gt;So basically this is nothing special, but another type of quasiconnectivity.&lt;/p&gt;</comment>
                            <comment id="29353" author="blueravengt" created="Tue, 18 Dec 2012 21:15:03 +0100"  >&lt;p&gt;The piston extension updates the piston base whenever it gets an update.&lt;/p&gt;</comment>
                            <comment id="27966" author="bljat" created="Wed, 12 Dec 2012 22:08:22 +0100"  >&lt;p&gt;In my tests activating the leaver doesn&apos;t make the piston extend till a block update is given - hence the relation.&lt;br/&gt;
Deactivating the leaver on the other hand retracts the piston without a block update for some reason.&lt;/p&gt;</comment>
                            <comment id="27964" author="cubethethird" created="Wed, 12 Dec 2012 21:59:25 +0100"  >&lt;p&gt;I don&apos;t believe so, because the behaviour does not seem to be affected by block updates.&lt;/p&gt;</comment>
                            <comment id="27950" author="bljat" created="Wed, 12 Dec 2012 18:56:17 +0100"  >&lt;p&gt;Pretty sure related to quasiconnectivity.&lt;/p&gt;</comment>
                            <comment id="25401" author="afrothoz" created="Tue, 27 Nov 2012 22:55:05 +0100"  >&lt;p&gt;Same here.&lt;/p&gt;</comment>
                            <comment id="25389" author="cubethethird" created="Tue, 27 Nov 2012 21:52:49 +0100"  >&lt;p&gt;In my trials it does not.&lt;/p&gt;</comment>
                            <comment id="25387" author="banana478" created="Tue, 27 Nov 2012 21:47:36 +0100"  >&lt;p&gt;When the block the piston is pushing is not touching the piston (because the piston is retracted), does powering the block cause the piston to extend?&lt;/p&gt;</comment>
                            <comment id="25386" author="cubethethird" created="Tue, 27 Nov 2012 21:41:57 +0100"  >&lt;p&gt;Can confirm, though I am unsure if this is intended. This behaviour is not like a BUD.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10102">
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                                        <issuelink>
            <issuekey id="11353">MC-108</issuekey>
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                            <attachment id="14350" name="2012-11-27_20.20.41.png" size="147560" author="afrothoz" created="Tue, 27 Nov 2012 21:42:07 +0100"/>
                            <attachment id="14351" name="2012-11-27_20.20.47.png" size="139476" author="afrothoz" created="Tue, 27 Nov 2012 21:42:07 +0100"/>
                            <attachment id="14352" name="2012-11-27_20.20.53.png" size="189450" author="afrothoz" created="Tue, 27 Nov 2012 21:42:07 +0100"/>
                            <attachment id="14353" name="2012-11-27_20.21.01.png" size="160249" author="afrothoz" created="Tue, 27 Nov 2012 21:42:07 +0100"/>
                            <attachment id="14354" name="2012-11-27_20.39.28.png" size="199685" author="afrothoz" created="Tue, 27 Nov 2012 21:42:07 +0100"/>
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