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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-3004] Can walk through piston arm if piston placed facing east (f = 3)</title>
                <link>https://bugs.mojang.com/browse/MC-3004</link>
                <project id="10400" key="MC">Minecraft: Java Edition</project>
                    <description>&lt;p&gt;In both gamemodes, placing a piston while facing east then powering it will allow you to talk through the piston head.&lt;br/&gt;
Walking through these piston while facing north makes the heads act as if they are a full block, meaning you can&apos;t walk to the piston arm itself. &lt;/p&gt;

&lt;p&gt;What I expected to happen was...:&lt;br/&gt;
What happens when the piston faces any other direction, you cannot walk through it.&lt;/p&gt;

&lt;p&gt;What actually happened was...:&lt;br/&gt;
You could walk through it&lt;/p&gt;

&lt;p&gt;Steps to Reproduce:&lt;br/&gt;
1. Face EAST&lt;br/&gt;
2. Place any kind of piston, one on top of each other&lt;br/&gt;
3. Power both pistons in any way&lt;br/&gt;
4. Face the arm from the south&lt;br/&gt;
5. Walk southwest so you are stuck between the arm and head of the piston&lt;br/&gt;
6. Walk southeast into the piston head&lt;/p&gt;
</description>
                <environment>Java 7&lt;br/&gt;
Windows 7</environment>
        <key id="14889">MC-3004</key>
            <summary>Can walk through piston arm if piston placed facing east (f = 3)</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="qqii">Qi-rui Chen</reporter>
                        <labels>
                            <label>directional</label>
                            <label>piston</label>
                    </labels>
                <created>Wed, 14 Nov 2012 21:11:31 +0100</created>
                <updated>Thu, 21 Jan 2016 16:40:29 +0100</updated>
                            <resolved>Thu, 5 Nov 2015 18:42:21 +0100</resolved>
                                    <version>Minecraft 1.4.4</version>
                    <version>Minecraft 1.4.6</version>
                    <version>Minecraft 1.4.7</version>
                    <version>Snapshot 13w04a</version>
                    <version>Snapshot 13w06a</version>
                    <version>Snapshot 13w07a</version>
                    <version>Snapshot 13w09a</version>
                    <version>Snapshot 13w10b</version>
                    <version>Minecraft 1.5</version>
                    <version>Minecraft 1.5.1</version>
                    <version>Minecraft 1.5.2</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 1.7.5</version>
                    <version>Minecraft 14w11b</version>
                    <version>Minecraft 1.7.6-pre1</version>
                    <version>Minecraft 1.7.6-pre2</version>
                    <version>Minecraft 1.7.9</version>
                    <version>Minecraft 14w20b</version>
                    <version>Minecraft 14w21a</version>
                    <version>Minecraft 14w21b</version>
                    <version>Minecraft 1.7.10</version>
                    <version>Minecraft 14w30c</version>
                    <version>Minecraft 14w33c</version>
                    <version>Minecraft 14w34a</version>
                    <version>Minecraft 14w34b</version>
                    <version>Minecraft 14w34c</version>
                    <version>Minecraft 14w34d</version>
                    <version>Minecraft 1.8-pre1</version>
                    <version>Minecraft 1.8-pre2</version>
                    <version>Minecraft 1.8</version>
                    <version>Minecraft 1.8.1-pre2</version>
                    <version>Minecraft 1.8.1-pre3</version>
                    <version>Minecraft 1.8.8</version>
                    <version>Minecraft 15w32c</version>
                    <version>Minecraft 15w34a</version>
                    <version>Minecraft 15w34b</version>
                    <version>Minecraft 15w34c</version>
                    <version>Minecraft 15w34d</version>
                                    <fixVersion>Minecraft 15w44b</fixVersion>
                                                        <votes>13</votes>
                                    <watches>10</watches>
                                                                            <comments>
                            <comment id="279188" author="magnavode" created="Thu, 21 Jan 2016 16:40:29 +0100"  >&lt;p&gt;I tested in 16w02a and the current 16w03a, both in all cardinal directions. I did not run into the bug.&lt;/p&gt;</comment>
                            <comment id="278847" author="redstonehelper" created="Tue, 19 Jan 2016 20:29:38 +0100"  >&lt;p&gt;So this is still happening in 16w02a?&lt;/p&gt;</comment>
                            <comment id="278772" author="jerrykim306" created="Tue, 19 Jan 2016 08:57:19 +0100"  >&lt;p&gt;Incorrect, Piston arms don&apos;t let go pass through when facing directions with the exception of facing west. Which means only Facing West will let player go through.&lt;/p&gt;</comment>
                            <comment id="261956" author="redstonehelper" created="Thu, 5 Nov 2015 18:42:21 +0100"  >&lt;p&gt;Fixed somewhere between 15w34d and 15w44b, probably with &lt;a href=&quot;https://bugs.mojang.com/browse/MC-1635&quot; title=&quot;Hitboxes for some blocks are broken&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-1635&quot;&gt;&lt;del&gt;MC-1635&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="261951" author="rydian" created="Thu, 5 Nov 2015 18:36:03 +0100"  >&lt;p&gt;Can&apos;t reproduce anymore in 15w45a, was probably fixed earlier.&lt;/p&gt;</comment>
                            <comment id="244722" author="amrsatrio" created="Sat, 22 Aug 2015 15:53:03 +0200"  >&lt;p&gt;Confirmed in 15w34d.&lt;/p&gt;</comment>
                            <comment id="203886" author="kumasasa" created="Thu, 16 Oct 2014 23:12:55 +0200"  >&lt;p&gt;Ok, got it.&lt;/p&gt;</comment>
                            <comment id="203885" author="themeaningofblah" created="Thu, 16 Oct 2014 23:02:31 +0200"  >&lt;p&gt;Can confirm fixed for pistons facing east, but it now occurs with a piston facing west.&lt;/p&gt;</comment>
                            <comment id="203878" author="magnavode" created="Thu, 16 Oct 2014 22:42:11 +0200"  >&lt;p&gt;The piston in the image you just posted is facing east, however the faulty piston is facing west (it is placed while facing east).&lt;br/&gt;
I double checked using the sandstone textures, however I really tired right now, maybe I overlooked something or I&apos;m missing the point of your picture.&lt;br/&gt;
Not that it really matters, it should be easy enough to find if you place 4 pistons around a redstone torch.&lt;/p&gt;</comment>
                            <comment id="203860" author="kumasasa" created="Thu, 16 Oct 2014 21:46:50 +0200"  >&lt;p&gt;Derp.  Meant 1.8.1-pre1, not 1.8-pre1.&lt;br/&gt;
But cannot confirm in 1.8.1-pre2, see screenshot&lt;/p&gt;</comment>
                            <comment id="203858" author="magnavode" created="Thu, 16 Oct 2014 21:34:06 +0200"  >&lt;p&gt;Only 1.8.1-pre1 has the adjusted hitbox (not 1.8). 1.8.1-pre2 is back to the old malformed hitbox.&lt;/p&gt;

&lt;p&gt;Edit: version fix 1.8-pre1 =&amp;gt; 1.8.1-pre1&lt;/p&gt;</comment>
                            <comment id="203845" author="kumasasa" created="Thu, 16 Oct 2014 21:07:25 +0200"  >&lt;p&gt;Was this fixed in 1.8 or 1.8-pre1 ? &lt;/p&gt;</comment>
                            <comment id="203569" author="magnavode" created="Wed, 15 Oct 2014 21:38:56 +0200"  >&lt;p&gt;Can confirm what George Gates commented.&lt;/p&gt;

&lt;p&gt;The piston arm&apos;s hitbox has been adjusted, but is still malformed.&lt;/p&gt;</comment>
                            <comment id="203560" author="rydian" created="Wed, 15 Oct 2014 20:55:54 +0200"  >&lt;p&gt;Tested in 1.8.1-pre1, and I was not able to recreate it.&lt;/p&gt;

&lt;p&gt;Piston arms facing west (according to the 1.8 debug menu&apos;s block info) have a differently-shaped hitbox than the other arms, but none of them can be walked through anymore from what I tried.&lt;/p&gt;</comment>
                            <comment id="195199" author="garyclosse" created="Fri, 29 Aug 2014 11:07:48 +0200"  >&lt;p&gt;Confirmed for 1.8pre2.&lt;/p&gt;</comment>
                            <comment id="194363" author="alca259" created="Tue, 26 Aug 2014 21:35:25 +0200"  >&lt;p&gt;Confirmed for 1.8 prerelease 2&lt;/p&gt;

&lt;p&gt;Please, fix it before release!!&lt;/p&gt;</comment>
                            <comment id="181013" author="jeditfm" created="Mon, 28 Jul 2014 12:58:05 +0200"  >&lt;p&gt;Still in 14w30c (&lt;a href=&quot;https://bugs.mojang.com/browse/MC-64115&quot; title=&quot;Pistonhead no-clip Bug&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-64115&quot;&gt;&lt;del&gt;MC-64115&lt;/del&gt;&lt;/a&gt;)&lt;/p&gt;</comment>
                            <comment id="166320" author="garyclosse" created="Sat, 21 Jun 2014 17:33:03 +0200"  >&lt;p&gt;Confirmed for 14w25b.&lt;/p&gt;</comment>
                            <comment id="160298" author="garyclosse" created="Mon, 26 May 2014 17:41:04 +0200"  >&lt;p&gt;Confirmed for 14w21b.&lt;/p&gt;</comment>
                            <comment id="135541" author="kpreid" created="Sun, 26 Jan 2014 17:57:28 +0100"  >&lt;p&gt;Confirmed in 14w04b: behavior appears to be identical to previous versions.&lt;/p&gt;</comment>
                            <comment id="135488" author="ezekielelin" created="Sun, 26 Jan 2014 16:31:17 +0100"  >&lt;p&gt;Is this still a concern in the latest Minecraft version &lt;b&gt;14w04b&lt;/b&gt;? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.&lt;/p&gt;</comment>
                            <comment id="87560" author="boxfigs" created="Wed, 10 Jul 2013 03:01:57 +0200"  >&lt;p&gt;Also in 1.6.2; I just tested it.&lt;/p&gt;

&lt;p&gt;It&apos;s very easy to do if you walk north or south into the piston arm, then turn to face the piston box a bit (it never works when turning to face the arm).&lt;br/&gt;
Also, you&apos;re able to strafe back and forth through the arm when facing east or west if you&apos;re in the right position.&lt;/p&gt;</comment>
                            <comment id="80648" author="suporemaster" created="Tue, 2 Jul 2013 16:54:28 +0200"  >&lt;p&gt;Tested it in 1.6.1, still here.&lt;/p&gt;</comment>
                            <comment id="69749" author="jrx1216" created="Thu, 30 May 2013 11:16:45 +0200"  >&lt;p&gt;confirmed in 13w21b. Walking south allows player (in any gamemode) and some mobs to pass through the &quot;arm&quot;. Walking north will only allow player to pass through if they jump near the piston first.&lt;/p&gt;</comment>
                            <comment id="48613" author="purple" created="Fri, 1 Mar 2013 13:01:01 +0100"  >&lt;p&gt;This bug breaks farms like the tripwire enderman farm because mobs get stuck inside the piston arm, so the pistons are constantly powered (because the mob steps on the pressure plate) and never retract. Voted.&lt;/p&gt;</comment>
                            <comment id="48422" author="rydian" created="Thu, 28 Feb 2013 20:10:34 +0100"  >&lt;p&gt;Confirmed to still happen in 13w09b.&lt;/p&gt;

&lt;p&gt;I first found out about it by falling through while walking on top. XD&lt;/p&gt;

&lt;p&gt;EDIT: I meant b.&lt;/p&gt;</comment>
                            <comment id="40189" author="bljat" created="Sun, 27 Jan 2013 02:48:18 +0100"  >&lt;p&gt;Confirmed in 13w04a.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10102">
                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="17989">MC-5386</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="18624">MC-5967</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="19030">MC-6360</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="20797">MC-7975</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="21583">MC-8622</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="23897">MC-10056</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="25806">MC-11641</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="26791">MC-12060</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="35495">MC-17550</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="53722">MC-32378</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="73530">MC-47862</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="78578">MC-52488</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="79725">MC-53498</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="80324">MC-54051</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="80908">MC-54589</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="82869">MC-56320</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="88700">MC-61410</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="88711">MC-61420</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="91531">MC-64115</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="91670">MC-64244</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="96708">MC-69092</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="106240">MC-77557</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="112050">MC-81616</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="117588">MC-85778</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="119342">MC-87106</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="15557">MC-3496</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                    </issuelinks>
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                            <attachment id="13175" name="2012-11-14_20.07.25.png" size="165944" author="qqii" created="Wed, 14 Nov 2012 21:11:31 +0100"/>
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                            <attachment id="13178" name="2012-11-14_20.07.47.png" size="60736" author="qqii" created="Wed, 14 Nov 2012 21:11:31 +0100"/>
                            <attachment id="13179" name="2012-11-14_20.08.00.png" size="43660" author="qqii" created="Wed, 14 Nov 2012 21:11:31 +0100"/>
                            <attachment id="13180" name="2012-11-14_20.08.04.png" size="54297" author="qqii" created="Wed, 14 Nov 2012 21:11:31 +0100"/>
                            <attachment id="13181" name="2012-11-14_20.08.09.png" size="288119" author="qqii" created="Wed, 14 Nov 2012 21:11:31 +0100"/>
                            <attachment id="13182" name="2012-11-14_20.08.11.png" size="286944" author="qqii" created="Wed, 14 Nov 2012 21:11:31 +0100"/>
                            <attachment id="13183" name="2012-11-14_20.08.20.png" size="68595" author="qqii" created="Wed, 14 Nov 2012 21:11:31 +0100"/>
                            <attachment id="84435" name="2014-10-16_23.11.46.png" size="80200" author="kumasasa" created="Thu, 16 Oct 2014 23:12:55 +0200"/>
                            <attachment id="37789" name="collision box visualisation.png" size="121612" author="magnavode" created="Sun, 21 Jul 2013 14:25:40 +0200"/>
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