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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-7166] Signal strenght, piston BUD and inconsistent behavior (activating when it shouldn&apos;t, not in all cases)</title>
                <link>https://bugs.mojang.com/browse/MC-7166</link>
                <project id="10400" key="MC">Minecraft: Java Edition</project>
                    <description>&lt;p&gt;A piston powered diagonally creates a BUD. If the redstone on a block diagonal to the piston has a signal strenght of one, and so a redstone on top of a block above the piston isn&apos;t powered, placing said &quot;level one&quot; redstone will power the piston. It will unpower it if you break it.&lt;/p&gt;

&lt;p&gt;That&apos;s the only way to toggle the piston, any other way to turn off the level 1 redstone will cause a BUD, as if the redstone above the piston wasn&apos;t there and so acting normal (emptying the dispenser hooked up to a comparator to create the signal of the appropriate strenght, preventing the comparator to emit by powering its B input, breaking the source or any redstone piece on the line that isn&apos;t the level 1 one).&lt;/p&gt;

&lt;p&gt;It&apos;s not directionnal, and happens in both gamemodes, and will not happen with glowstone or half slab as the block above the piston.&lt;/p&gt;

&lt;p&gt;I think it comes from the level 1 redstone placing / breaking causing an update to the adjacent redstone piece which update the block below, because it&apos;s redstone, which in turn update the piston. Although i don&apos;t know the inner workings of redstone, so take it only as the assumption that it is (and correct me if i&apos;m wrong, i would appreciate to know more about redstone).&lt;/p&gt;

&lt;p&gt;(Edit) Mentionned the glowstone and half slab thing.&lt;/p&gt;</description>
                <environment></environment>
        <key id="19945">MC-7166</key>
            <summary>Signal strenght, piston BUD and inconsistent behavior (activating when it shouldn&apos;t, not in all cases)</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="sewdio">SewdiO</reporter>
                        <labels>
                            <label>BUD</label>
                            <label>piston</label>
                            <label>signal</label>
                            <label>strenght</label>
                    </labels>
                <created>Fri, 11 Jan 2013 22:48:57 +0100</created>
                <updated>Sun, 6 Sep 2015 22:04:26 +0200</updated>
                            <resolved>Fri, 11 Jan 2013 22:54:24 +0100</resolved>
                                    <version>Snapshot 13w02a</version>
                    <version>Snapshot 13w02b</version>
                                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                            <comments>
                            <comment id="35737" author="bljat" created="Fri, 11 Jan 2013 23:22:01 +0100"  >&lt;p&gt;Well the whole point why it works like this is because 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;. When that gets fixed this inconsistency will go away anyway.&lt;/p&gt;</comment>
                            <comment id="35736" author="sewdio" created="Fri, 11 Jan 2013 23:18:07 +0100"  >&lt;p&gt;Yup you&apos;re indeed right. I still don&apos;t see it as a 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; though, as it is the update that is the problem here, not the BUD itself (the redstone shouldn&apos;t update the piston to go along with the recent change of the fence gates, redstone lamps and such). Also not a duplicate of &lt;a href=&quot;https://bugs.mojang.com/browse/MC-1263&quot; title=&quot;Powered mechanisms react to change of redstone connectivity&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-1263&quot;&gt;&lt;del&gt;MC-1263&lt;/del&gt;&lt;/a&gt; because in it the issue is the redstone powering the piston, not just updating (it oculd update just fine without powering the piston).&lt;/p&gt;

&lt;p&gt;I apologies for the rudeness in the previous post.&lt;/p&gt;</comment>
                            <comment id="35729" author="bljat" created="Fri, 11 Jan 2013 23:08:36 +0100"  >&lt;p&gt;It&apos;s updating the piston because the redstone connectivity changes from &quot;dot&quot; to &quot;line&quot;, see &lt;a href=&quot;https://bugs.mojang.com/browse/MC-1263&quot; title=&quot;Powered mechanisms react to change of redstone connectivity&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-1263&quot;&gt;&lt;del&gt;MC-1263&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="35724" author="sewdio" created="Fri, 11 Jan 2013 23:00:26 +0100"  >&lt;p&gt;It&apos;s &lt;b&gt;not&lt;/b&gt; this. Did you even read the post ? The block &lt;b&gt;should&lt;/b&gt; create a BUD, but does not in the condition said. I would never have listed the issue if it was what you said, i know BUDs enough for this.&lt;/p&gt;

&lt;p&gt;It&apos;s quite frustrating to get an issue tagged as resolved for duplicate when reading it shows it&apos;s something different.&lt;/p&gt;

&lt;p&gt;(Edit) Sorry if i sound aggressive.&lt;/p&gt;

&lt;p&gt;(Edit2) Or maybe it is ? Does the redstone above the piston acts as the fence gates / redstone lamps did when working ? If it is i still think it should be fixed, but admit the duplicate.&lt;/p&gt;</comment>
                            <comment id="35720" author="bljat" created="Fri, 11 Jan 2013 22:54:24 +0100"  >&lt;p&gt;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;.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10102">
                    <name>Duplicate</name>
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                                        <issuelink>
            <issuekey id="11353">MC-108</issuekey>
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            <issuekey id="12584">MC-1263</issuekey>
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                            <attachment id="18303" name="2013-01-11_22.33.51.png" size="149331" author="sewdio" created="Fri, 11 Jan 2013 22:48:57 +0100"/>
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