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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-8836] Signs and carpet do not drop when the underlying block is moved by piston</title>
                <link>https://bugs.mojang.com/browse/MC-8836</link>
                <project id="10400" key="MC">Minecraft: Java Edition</project>
                    <description>&lt;h3&gt;&lt;a name=&quot;Thebug&quot;&gt;&lt;/a&gt;The bug&lt;/h3&gt;
&lt;p&gt;Signs and carpet does not drop when the underlying block is moved by a piston.&lt;/p&gt;

&lt;p&gt;This may be intended given that &lt;a href=&quot;https://bugs.mojang.com/browse/MC-17851&quot; title=&quot;Blocks requiring any support block (carpets, signs) placed on piston head break when sticky piston retracts&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-17851&quot;&gt;&lt;del&gt;MC-17851&lt;/del&gt;&lt;/a&gt; was fixed (though possibly not on purpose), however it is inconsistent with other blocks which require a supporting block. These blocks do drop when the supporting block is moved, even if the new block at that position would support them as well.&lt;/p&gt;

&lt;p&gt;See the attached &lt;span class=&quot;nobr&quot;&gt;&lt;a href=&quot;https://bugs.mojang.com/secure/attachment/311050/311050_Inconsistent+dropping+behavior.mp4&quot; title=&quot;Inconsistent dropping behavior.mp4 attached to MC-8836&quot;&gt;Inconsistent dropping behavior.mp4&lt;sup&gt;&lt;img class=&quot;rendericon&quot; src=&quot;https://bugs.mojang.com/images/icons/link_attachment_7.gif&quot; height=&quot;7&quot; width=&quot;7&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/sup&gt;&lt;/a&gt;&lt;/span&gt; showing a setup for reproducing this and outlining the inconsistency.&lt;/p&gt;</description>
                <environment></environment>
        <key id="22111">MC-8836</key>
            <summary>Signs and carpet do not drop when the underlying block is moved by piston</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="6">Works As Intended</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="marcono1234">Marcono1234</reporter>
                        <labels>
                            <label>carpet</label>
                            <label>moving_piston</label>
                            <label>piston</label>
                            <label>sign</label>
                    </labels>
                <created>Thu, 31 Jan 2013 21:49:09 +0100</created>
                <updated>Fri, 6 Oct 2023 09:10:19 +0200</updated>
                            <resolved>Fri, 6 Oct 2023 09:10:19 +0200</resolved>
                                    <version>Minecraft 1.4.6</version>
                    <version>Minecraft 1.4.7</version>
                    <version>Snapshot 13w04a</version>
                    <version>Snapshot 13w05a</version>
                    <version>Minecraft 1.12</version>
                    <version>Minecraft 1.12.1</version>
                    <version>Minecraft 1.12.2</version>
                    <version>Minecraft 17w50a</version>
                    <version>Minecraft 1.13</version>
                    <version>Minecraft 18w31a</version>
                    <version>Minecraft 1.13.1</version>
                    <version>Minecraft 1.13.2</version>
                    <version>Minecraft 18w47a</version>
                    <version>Minecraft 18w47b</version>
                    <version>Minecraft 18w48a</version>
                    <version>Minecraft 18w48b</version>
                    <version>Minecraft 18w49a</version>
                    <version>Minecraft 18w50a</version>
                    <version>Minecraft 19w02a</version>
                    <version>1.15.1</version>
                    <version>1.15.2 Pre-Release 1</version>
                    <version>1.15.2 Pre-release 2</version>
                    <version>1.15.2</version>
                    <version>20w06a</version>
                    <version>20w07a</version>
                    <version>20w08a</version>
                    <version>20w09a</version>
                    <version>20w10a</version>
                    <version>20w11a</version>
                    <version>20w12a</version>
                    <version>20w13a</version>
                    <version>20w13b</version>
                    <version>20w14a</version>
                    <version>20w15a</version>
                    <version>20w16a</version>
                    <version>20w17a</version>
                    <version>20w18a</version>
                    <version>20w19a</version>
                    <version>20w20b</version>
                    <version>20w21a</version>
                    <version>20w22a</version>
                    <version>1.16 Pre-release 1</version>
                    <version>1.16 Pre-release 2</version>
                    <version>1.16 Pre-release 3</version>
                    <version>1.16 Pre-release 4</version>
                    <version>1.16 Pre-release 5</version>
                    <version>1.16 Pre-release 7</version>
                    <version>1.16 Release Candidate 1</version>
                    <version>1.16</version>
                    <version>1.16.1</version>
                    <version>20w27a</version>
                    <version>20w28a</version>
                    <version>20w29a</version>
                    <version>20w30a</version>
                    <version>1.16.2 Pre-release 1</version>
                    <version>1.16.2 Pre-release 2</version>
                    <version>1.16.2 Release Candidate 1</version>
                    <version>1.16.2 Release Candidate 2</version>
                    <version>1.16.2</version>
                    <version>1.16.3 Release Candidate 1</version>
                    <version>1.16.3</version>
                    <version>1.16.4 Pre-release 1</version>
                    <version>1.16.4 Pre-release 2</version>
                    <version>1.16.4 Release Candidate 1</version>
                    <version>1.16.4</version>
                    <version>20w45a</version>
                    <version>20w46a</version>
                    <version>20w48a</version>
                    <version>20w49a</version>
                    <version>20w51a</version>
                    <version>21w03a</version>
                    <version>1.16.5</version>
                    <version>21w05a</version>
                    <version>21w05b</version>
                    <version>21w06a</version>
                    <version>21w07a</version>
                    <version>21w08b</version>
                    <version>21w10a</version>
                    <version>21w11a</version>
                    <version>21w13a</version>
                    <version>21w14a</version>
                    <version>21w15a</version>
                    <version>21w16a</version>
                    <version>21w17a</version>
                    <version>21w18a</version>
                    <version>21w19a</version>
                    <version>21w20a</version>
                    <version>1.17 Release Candidate 2</version>
                    <version>1.17</version>
                    <version>1.17.1</version>
                    <version>1.18.1</version>
                    <version>1.18.2</version>
                    <version>1.19</version>
                    <version>1.19.2</version>
                    <version>1.19.3</version>
                    <version>1.20 Release Candidate 1</version>
                    <version>1.20</version>
                    <version>1.20.1</version>
                                                                        <votes>10</votes>
                                    <watches>13</watches>
                                                                            <comments>
                            <comment id="1208454" author="torzod" created="Sat, 29 Oct 2022 02:07:18 +0200"  >&lt;p&gt;the reason for this is that carpets and signs do not require supporting faces, which the moving_piston block does not have. most other support blocks need full faces, so when the sandstone is turned into moving_piston, it no longer has a solid face to anchor to.&lt;/p&gt;</comment>
                            <comment id="1207658" author="JIRAUSER566325" created="Wed, 26 Oct 2022 12:06:26 +0200"  >&lt;p&gt;Can confirm in 1.19.2.&lt;/p&gt;</comment>
                            <comment id="1179024" author="JIRAUSER566325" created="Sat, 2 Jul 2022 12:41:36 +0200"  >&lt;p&gt;Can confirm in 1.19.&lt;/p&gt;</comment>
                            <comment id="1145550" author="JIRAUSER566325" created="Sat, 5 Mar 2022 20:29:48 +0100"  >&lt;p&gt;Can confirm in 1.18.2.&lt;/p&gt;</comment>
                            <comment id="1127385" author="JIRAUSER566325" created="Thu, 16 Dec 2021 16:24:38 +0100"  >&lt;p&gt;Can confirm in 1.18.1.&lt;/p&gt;</comment>
                            <comment id="742210" author="jack_mckalling" created="Wed, 24 Jun 2020 15:59:01 +0200"  >&lt;p&gt;Now following the video clip, I see what is wrong, and it still happens.&lt;/p&gt;</comment>
                            <comment id="736084" author="marcono1234" created="Sat, 20 Jun 2020 16:18:11 +0200"  >&lt;p&gt;Removed the old screenshot attachments since they were in part describing &lt;a href=&quot;https://bugs.mojang.com/browse/MC-17851&quot; title=&quot;Blocks requiring any support block (carpets, signs) placed on piston head break when sticky piston retracts&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-17851&quot;&gt;&lt;del&gt;MC-17851&lt;/del&gt;&lt;/a&gt;, which was slightly misleading. Instead attached a video showing the inconsistency.&lt;/p&gt;</comment>
                            <comment id="733091" author="propork3455" created="Wed, 17 Jun 2020 17:00:23 +0200"  >&lt;p&gt;Still an issue in pre-7.&lt;/p&gt;</comment>
                            <comment id="733088" author="jack_mckalling" created="Wed, 17 Jun 2020 16:57:18 +0200"  >&lt;p&gt;I tested all possibilities more extensively, and I&apos;ve come to a different outcome than I expected. While assuming the sticky piston is always setup to immediately push against a solid block, and the sign and carpet is attached to that block, the following happens.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;When the sticky piston is placed to extend upwards before powering&lt;/b&gt;:&lt;br/&gt;
On extend, sign will stay but carpet moves up with the solid block&lt;br/&gt;
On retract, sign will still stay but carpet drops because it&apos;s not attached to&#160;a solid block anymore&lt;/p&gt;

&lt;p&gt;&lt;b&gt;When the sticky piston is placed and powered to extend upwards&lt;/b&gt;:&lt;br/&gt;
On retract, sign and carpet both will pop off&lt;/p&gt;

&lt;p&gt;&lt;b&gt;When the sticky piston is placed to extend sideways before powering&lt;/b&gt;:&lt;br/&gt;
On extend, sign and carpet both will stay put&lt;br/&gt;
On retract, sign and carpet both will stay put&lt;/p&gt;

&lt;p&gt;&lt;b&gt;When the sticky piston is placed and powered to extend sideways&lt;/b&gt;:&lt;br/&gt;
On retract, sign and carpet both will pop off&lt;/p&gt;

&lt;p&gt;With these results, I&apos;m not sure anything is broken here.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</comment>
                            <comment id="503768" author="oval" created="Thu, 29 Nov 2018 00:16:22 +0100"  >&lt;p&gt;&lt;a href=&quot;https://bugs.mojang.com/secure/ViewProfile.jspa?name=Awesoman3000&quot; class=&quot;user-hover&quot; rel=&quot;Awesoman3000&quot;&gt;Awesoman3000&lt;/a&gt;, I still can reproduce for 18w47b.&lt;/p&gt;</comment>
                            <comment id="503761" author="awesoman3000" created="Thu, 29 Nov 2018 00:00:40 +0100"  >&lt;p&gt;Cannot reproduce in 18w47b&lt;/p&gt;</comment>
                            <comment id="484739" author="kraif" created="Sat, 25 Aug 2018 13:32:49 +0200"  >&lt;p&gt;Confirmed for 1.13.1.&lt;/p&gt;</comment>
                            <comment id="404395" author="alugia" created="Sun, 27 Aug 2017 19:06:19 +0200"  >&lt;p&gt;Confirmed for 1.12.1&lt;/p&gt;</comment>
                            <comment id="41944" author="bljat" created="Thu, 31 Jan 2013 21:51:20 +0100"  >&lt;p&gt;&lt;del&gt;Duplicate of &lt;a href=&quot;https://bugs.mojang.com/browse/MC-3287&quot; title=&quot;Inconsistency with pistons pushing items &quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-3287&quot;&gt;&lt;del&gt;MC-3287&lt;/del&gt;&lt;/a&gt;.&lt;/del&gt;&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10102">
                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="342979">MC-191517</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="358833">MC-196117</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="413261">MC-215401</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10103">
                    <name>Relates</name>
                                            <outwardlinks description="relates to">
                                        <issuelink>
            <issuekey id="18254">MC-5621</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="35967">MC-17851</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="relates to">
                                        <issuelink>
            <issuekey id="38112">MC-19403</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                    </issuelinks>
                <attachments>
                            <attachment id="311050" name="Inconsistent dropping behavior.mp4" size="579727" author="marcono1234" created="Sat, 20 Jun 2020 16:12:24 +0200"/>
                            <attachment id="455988" name="MC-8836.mp4" size="5312376" author="Avoma" created="Mon, 8 Nov 2021 14:58:22 +0100"/>
                            <attachment id="455989" name="MC-8836.png" size="2739221" author="Avoma" created="Mon, 8 Nov 2021 14:58:56 +0100"/>
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