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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>
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        <build-number>9120002</build-number>
        <build-date>10-01-2024</build-date>
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<item>
            <title>[MC-11503] 1 tick pulse piston bug</title>
                <link>https://bugs.mojang.com/browse/MC-11503</link>
                <project id="10400" key="MC">Minecraft: Java Edition</project>
                    <description>&lt;p&gt;I found a weird bug a while ago. Sometimes, when you power a double extender with pistons facing up with redstone going in to it, either the top or the bottom one will fire.&lt;/p&gt;

&lt;p&gt;How to replicate:&lt;br/&gt;
1. make a 1 tick pulse shortener by placing redstone, a piston with a block on top next to it and a repeater behind that (as in the pic).&lt;br/&gt;
2. connect a redstone wire to the repeater and go one block out every other block and put redstone on top of that (like in the pic).&lt;br/&gt;
3. place 2 pistons on top of each other at the end of each redstone wire pointing out, so the wire goes into the pistons.&lt;br/&gt;
4. press the button.&lt;/p&gt;

&lt;p&gt;Note: you won&apos;t always get a weird result, it&apos;s very un-predicatable.&lt;/p&gt;</description>
                <environment>Mac OS X 10.6.6&lt;br/&gt;
java version 1.6.0_22-b04-307</environment>
        <key id="25648">MC-11503</key>
            <summary>1 tick pulse piston bug</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="traks">traks</reporter>
                        <labels>
                            <label>piston</label>
                            <label>pulse</label>
                            <label>random</label>
                            <label>redstone</label>
                            <label>tick</label>
                            <label>unreliable</label>
                    </labels>
                <created>Sun, 10 Mar 2013 17:51:14 +0100</created>
                <updated>Wed, 14 Sep 2016 14:26:59 +0200</updated>
                            <resolved>Wed, 14 Sep 2016 14:26:59 +0200</resolved>
                                    <version>Snapshot 13w10b</version>
                    <version>Minecraft 1.5</version>
                    <version>Minecraft 1.5.1</version>
                    <version>Minecraft 1.5.2</version>
                    <version>Snapshot 13w18c</version>
                    <version>Snapshot 13w19a</version>
                    <version>Minecraft 1.8.1-pre3</version>
                    <version>Minecraft 1.8.7</version>
                                                                        <votes>4</votes>
                                    <watches>4</watches>
                                                                            <comments>
                            <comment id="329045" author="suncat" created="Thu, 8 Sep 2016 21:05:15 +0200"  >&lt;p&gt;Relates to/dupes &lt;a href=&quot;https://bugs.mojang.com/browse/MC-11193&quot; title=&quot;The order in which powerable blocks (e.g. redstone dust blocks) along a wire are powered or de-powered is not clearly defined and causes a non-deterministic behavior for redstone contraptions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-11193&quot;&gt;MC-11193&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="205361" author="galaxy_2alex" created="Sat, 25 Oct 2014 15:31:01 +0200"  >&lt;p&gt;Reopened, thanks&lt;/p&gt;</comment>
                            <comment id="205354" author="traks" created="Sat, 25 Oct 2014 15:17:40 +0200"  >&lt;p&gt;Yes, the bug is still prevalent in Minecraft version 1.8.1 Prerelease 3. I added it to the list of affected versions.&lt;/p&gt;</comment>
                            <comment id="205339" author="galaxy_2alex" created="Sat, 25 Oct 2014 15:00:57 +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="163611" author="funny_monke6" created="Tue, 17 Jun 2014 17:47:43 +0200"  >&lt;p&gt;Even though the pistons on top of each other are powered in the same tick, they are powered in a certain order, which is based on complicated redstone stuff. It&apos;s basically random which one fires first.&lt;/p&gt;</comment>
                            <comment id="51659" author="dicotheredstoner" created="Sun, 10 Mar 2013 22:01:02 +0100"  >&lt;p&gt;That doesn&apos;t really add much to the issue. Its the inconsistency which just has to be fixed, it should just not be random.&lt;/p&gt;</comment>
                            <comment id="51654" author="redjokerftw" created="Sun, 10 Mar 2013 21:50:52 +0100"  >&lt;p&gt;this is because you are powering 2 pistons at the same time (1 whit the redstone and 1 whit the block where the redstone is on top). They made this so your game won&apos;t crash. Far as I know it is random where the bottom piston and top piston fires first. &lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10102">
                    <name>Duplicate</name>
                                            <outwardlinks description="duplicates">
                                        <issuelink>
            <issuekey id="25303">MC-11193</issuekey>
        </issuelink>
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                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="25808">MC-11643</issuekey>
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                <attachments>
                            <attachment id="24118" name="2013-03-10_17.37.34.png" size="424860" author="traks" created="Sun, 10 Mar 2013 17:51:15 +0100"/>
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