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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>
    </build-info>


<item>
            <title>[MC-9405] Top piece of staircase redstone dust doesn&apos;t power blocks on the same height in the direction it is powered from unless only connected to something on the other side</title>
                <link>https://bugs.mojang.com/browse/MC-9405</link>
                <project id="10400" key="MC">Minecraft: Java Edition</project>
                    <description>&lt;p&gt;See attached screenshots. The piston is not powered by the redstone dust behind it even though the dust is pointing into the piston. The piston only becomes powered once you connect that piece of redstone dust with something else, like a lever/button/redstone dust/redstone block. This can be on the same level, below or above (if applicable). The piece of redstone dust may not be connected to anything on the side, otherwise the piston won&apos;t be powered either.&lt;/p&gt;

&lt;p&gt;I&apos;m not even going to attempt explaining what logic error caused this bug.&lt;/p&gt;</description>
                <environment></environment>
        <key id="23005">MC-9405</key>
            <summary>Top piece of staircase redstone dust doesn&apos;t power blocks on the same height in the direction it is powered from unless only connected to something on the other side</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="1">Fixed</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="redstonehelper">[Mod] redstonehelper</reporter>
                        <labels>
                            <label>piston</label>
                            <label>redstone</label>
                            <label>redstone-wire</label>
                    </labels>
                <created>Fri, 8 Feb 2013 15:01:46 +0100</created>
                <updated>Tue, 5 May 2020 12:17:31 +0200</updated>
                            <resolved>Tue, 5 May 2020 12:17:31 +0200</resolved>
                                    <version>Snapshot 13w06a</version>
                    <version>Snapshot 13w09c</version>
                    <version>Snapshot 13w10a</version>
                    <version>Minecraft 1.5</version>
                    <version>Snapshot 13w11a</version>
                    <version>Minecraft 1.5.1</version>
                    <version>Minecraft 1.5.2</version>
                    <version>Snapshot 13w18c</version>
                    <version>Snapshot 13w19a</version>
                    <version>Snapshot 13w21b</version>
                    <version>Snapshot 13w22a</version>
                    <version>Snapshot 13w23a</version>
                    <version>Minecraft 1.6.4</version>
                    <version>Minecraft 1.7.1</version>
                    <version>Minecraft 1.7.2</version>
                    <version>Minecraft 13w48a</version>
                    <version>Minecraft 13w48b</version>
                    <version>Minecraft 13w49a</version>
                    <version>Minecraft 1.7.3</version>
                    <version>Minecraft 1.7.4</version>
                    <version>Minecraft 14w05b</version>
                    <version>Minecraft 14w06b</version>
                    <version>Minecraft 14w07a</version>
                    <version>Minecraft 14w08a</version>
                    <version>Minecraft 1.7.5</version>
                    <version>Minecraft 14w11b</version>
                    <version>Minecraft 14w17a</version>
                    <version>Minecraft 14w18a</version>
                    <version>Minecraft 1.8</version>
                    <version>Minecraft 1.8.1-pre3</version>
                    <version>Minecraft 1.8.8</version>
                    <version>Minecraft 15w40b</version>
                    <version>Minecraft 15w45a</version>
                    <version>Minecraft 1.11.2</version>
                    <version>Minecraft 17w06a</version>
                                    <fixVersion>20w18a</fixVersion>
                                                        <votes>6</votes>
                                    <watches>11</watches>
                                                                            <comments>
                            <comment id="685468" author="redcmd" created="Fri, 1 May 2020 04:19:52 +0200"  >&lt;p&gt;Fixed 20w18a&lt;/p&gt;</comment>
                            <comment id="569417" author="redcmd" created="Thu, 25 Jul 2019 06:38:43 +0200"  >&lt;p&gt;The bug is that when a block (or piston, redstone lamp, trapdoor etc) checks to see if redstone is pointing towards it&lt;br/&gt;
 It actually checks to see if the dust is pointing away from it AND if its not pointing to the left or right&lt;br/&gt;
 (Theres a seperate check to see if the dust is a dot, rather than a line)&lt;/p&gt;

&lt;p&gt;A simple fix that works 100% is...&lt;/p&gt;

&lt;p&gt;Inside the BlockRedstoneWire.class&lt;br/&gt;
 At the bottom of the method getWeakPower()&lt;br/&gt;
Just below&lt;/p&gt;
&lt;div class=&quot;code panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;codeContent panelContent&quot;&gt;
&lt;pre class=&quot;code-java&quot;&gt;                &lt;span class=&quot;code-keyword&quot;&gt;if&lt;/span&gt; (side.getAxis().isHorizontal() &amp;amp;&amp;amp; enumset.isEmpty()) {
                    &lt;span class=&quot;code-keyword&quot;&gt;return&lt;/span&gt; i;
                }
                &lt;span class=&quot;code-keyword&quot;&gt;else&lt;/span&gt; &lt;span class=&quot;code-keyword&quot;&gt;if&lt;/span&gt; (enumset.contains(side) &amp;amp;&amp;amp; !enumset.contains(side.rotateYCCW()) &amp;amp;&amp;amp; !enumset.contains(side.rotateY())) {
                    &lt;span class=&quot;code-keyword&quot;&gt;return&lt;/span&gt; i;
                }
&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;
&lt;p&gt;and above&lt;/p&gt;
&lt;div class=&quot;code panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;codeContent panelContent&quot;&gt;
&lt;pre class=&quot;code-java&quot;&gt;                &lt;span class=&quot;code-keyword&quot;&gt;else&lt;/span&gt;
                {
                    &lt;span class=&quot;code-keyword&quot;&gt;return&lt;/span&gt; 0;
                }
&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;p&gt;add&lt;/p&gt;
&lt;div class=&quot;code panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;codeContent panelContent&quot;&gt;
&lt;pre class=&quot;code-java&quot;&gt;                &lt;span class=&quot;code-keyword&quot;&gt;else&lt;/span&gt; &lt;span class=&quot;code-keyword&quot;&gt;if&lt;/span&gt; (enumset.contains(side.getOpposite())) {
                    &lt;span class=&quot;code-keyword&quot;&gt;return&lt;/span&gt; i;
                }
&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;p&gt;(It fixes all except the slab tower, which is another bug)&lt;br/&gt;
 &lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;a id=&quot;229236_thumb&quot; href=&quot;https://bugs.mojang.com/secure/attachment/229236/229236_RS+redirect+bug.png&quot; title=&quot;RS redirect bug.png&quot; file-preview-type=&quot;image&quot; file-preview-id=&quot;229236&quot; file-preview-title=&quot;RS redirect bug.png&quot;&gt;&lt;img src=&quot;https://bugs.mojang.com/secure/thumbnail/229236/_thumb_229236.png&quot; style=&quot;border: 0px solid black&quot; role=&quot;presentation&quot;/&gt;&lt;/a&gt;&lt;/span&gt; &lt;/p&gt;</comment>
                            <comment id="263609" author="jeb" created="Tue, 10 Nov 2015 10:04:30 +0100"  >&lt;p&gt;Won&apos;t fix because the risk is too high that something else changes behavior.&lt;/p&gt;</comment>
                            <comment id="154372" author="garyclosse" created="Thu, 1 May 2014 11:47:15 +0200"  >&lt;p&gt;Confirmed for 14w18a&lt;/p&gt;</comment>
                            <comment id="144500" author="garyclosse" created="Tue, 4 Mar 2014 10:37:01 +0100"  >&lt;p&gt;Still a concern in 1.7.5 and 14w08a&lt;/p&gt;</comment>
                            <comment id="62621" author="traffic187" created="Mon, 22 Apr 2013 11:41:53 +0200"  >&lt;p&gt;due to BUD this may have to stay as is, however I have found some fun uses for it.&lt;/p&gt;</comment>
                            <comment id="59169" author="zenox_omega" created="Sun, 7 Apr 2013 07:06:34 +0200"  >&lt;p&gt;I as well am experiencing such problems with pistons although i am not sure weather or not to report it as a new bug.&lt;br/&gt;
(pistons powered with a redstone block forced into place above the now bugged piston, by a non effected stick piston are powering other pistons diagonally and will not retract after the power&quot;redstone block&quot; source is retracted &quot;only will retract after redstone block and others nearby are destroyed&quot; and so not helping my constant testing for a perfect fully automatic sugarcane farm) &lt;br/&gt;
If this is a new bug please contact me and i can provide more details and screen shots.&lt;/p&gt;</comment>
                            <comment id="44517" author="bljat" created="Fri, 8 Feb 2013 17:09:35 +0100"  >&lt;p&gt;Confirmed.&lt;/p&gt;</comment>
                            <comment id="44507" author="traffic187" created="Fri, 8 Feb 2013 16:00:12 +0100"  >&lt;p&gt;Added image so its clearer for you guys.&lt;/p&gt;</comment>
                            <comment id="44502" author="traffic187" created="Fri, 8 Feb 2013 15:15:54 +0100"  >&lt;p&gt;I was hoping it was a new way for a bud switch, but sadly no. lol&lt;/p&gt;</comment>
                            <comment id="44501" author="traffic187" created="Fri, 8 Feb 2013 15:13:25 +0100"  >&lt;p&gt;No, they are not waiting for an update.&lt;/p&gt;</comment>
                            <comment id="44497" author="banana478" created="Fri, 8 Feb 2013 15:03:06 +0100"  >&lt;p&gt;If you place a block next to the pistons that aren&apos;t extending, do they update and extend?&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10102">
                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="27500">MC-12643</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="27703">MC-12811</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="40681">MC-21689</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="44947">MC-25534</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="68668">MC-44063</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="123108">MC-89855</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="123131">MC-89866</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="138483">MC-100326</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="216780">MC-138049</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10103">
                    <name>Relates</name>
                                            <outwardlinks description="relates to">
                                        <issuelink>
            <issuekey id="21606">MC-8645</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="97399">MC-69764</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="13661">MC-2255</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="15299">MC-3311</issuekey>
        </issuelink>
                            </outwardlinks>
                                                        </issuelinktype>
                    </issuelinks>
                <attachments>
                            <attachment id="101195" name="2015-10-05_02.26.02.png" size="990815" author="redstonehelper" created="Mon, 5 Oct 2015 03:04:28 +0200"/>
                            <attachment id="101194" name="2015-10-05_02.26.07.png" size="889591" author="redstonehelper" created="Mon, 5 Oct 2015 03:04:28 +0200"/>
                            <attachment id="101196" name="2015-10-05_02.26.11.png" size="1001240" author="redstonehelper" created="Mon, 5 Oct 2015 03:04:28 +0200"/>
                            <attachment id="21356" name="BugPiston.bmp" size="1227558" author="traffic187" created="Fri, 8 Feb 2013 15:01:46 +0100"/>
                            <attachment id="21359" name="Clear image.jpg" size="107645" author="traffic187" created="Fri, 8 Feb 2013 16:00:12 +0100"/>
                            <attachment id="229236" name="RS redirect bug.png" size="539351" author="RedCMD" created="Thu, 25 Jul 2019 06:38:43 +0200"/>
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