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    <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-11390] Can duplicate blocks with fast firing piston</title>
                <link>https://bugs.mojang.com/browse/MC-11390</link>
                <project id="10400" key="MC">Minecraft: Java Edition</project>
                    <description>&lt;p&gt;relates to:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://mojang.atlassian.net/browse/MC-1677&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://mojang.atlassian.net/browse/MC-1677&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://mojang.atlassian.net/browse/MC-5726&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://mojang.atlassian.net/browse/MC-5726&lt;/a&gt; &lt;/p&gt;

&lt;p&gt;if a block is placed on the face of a horizontal, fast firing piston during a small window where the piston is retracted (aim for bottom edge), the block can be duplicated.&lt;br/&gt;
(not seeing any open copies of this bug, it seems to be a repeat offender though)&lt;/p&gt;</description>
                <environment>win7x64, intel 2600k, gtx 680  &lt;br/&gt;
java version &amp;quot;1.6.0_31&amp;quot;&lt;br/&gt;
Java(TM) SE Runtime Environment (build 1.6.0_31-b05)&lt;br/&gt;
Java HotSpot(TM) 64-Bit Server VM (build 20.6-b01, mixed mode)</environment>
        <key id="25525">MC-11390</key>
            <summary>Can duplicate blocks with fast firing 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="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="oneeyedziggy">Andrew Whitaker</reporter>
                        <labels>
                            <label>clock</label>
                            <label>hitbox</label>
                            <label>piston</label>
                            <label>push</label>
                            <label>pushed</label>
                            <label>pushes</label>
                            <label>redstone</label>
                    </labels>
                <created>Sat, 9 Mar 2013 08:14:08 +0100</created>
                <updated>Thu, 7 May 2015 20:45:11 +0200</updated>
                            <resolved>Sat, 9 Mar 2013 10:43:17 +0100</resolved>
                                    <version>Minecraft 1.5</version>
                                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                            <comments>
                            <comment id="51259" author="oneeyedziggy" created="Sat, 9 Mar 2013 10:32:14 +0100"  >&lt;p&gt;it appears so. block disappears on reload and update as well. (also caught the piston &quot;deleting&quot; blocks,like the video in that ticket) so please feel free to close and link. Sorry for the dupe.&lt;/p&gt;</comment>
                            <comment id="51255" author="kumasasa" created="Sat, 9 Mar 2013 09:57:20 +0100"  >&lt;p&gt;Then it&apos;s a duplicate of &lt;a href=&quot;https://bugs.mojang.com/browse/MC-631&quot; title=&quot;Duplicating/deleting blocks&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-631&quot;&gt;&lt;del&gt;MC-631&lt;/del&gt;&lt;/a&gt; , isn&apos;t it ?&lt;/p&gt;</comment>
                            <comment id="51254" author="oneeyedziggy" created="Sat, 9 Mar 2013 09:51:07 +0100"  >&lt;p&gt;On further inspection, the created block (farthest from piston) Is solid, and can be stood upon and cannot be walked through from the side, but does not drop a block when mined. I suspected it could be a block id conflict with 2 instances of the duped block (blackbox test assumption) so i duped the block in survival, switched to creative, removed the block that would have dropped a birch log item wen pined, switched back to survival, and tried to mine the dupe block, but it still did not drop anything.&lt;/p&gt;</comment>
                            <comment id="51251" author="oneeyedziggy" created="Sat, 9 Mar 2013 09:37:37 +0100"  >&lt;p&gt;to duplicate in survival mode (and be able to mine the blocks &quot;in flight&quot;) I used Birch logs and a diamond ax with &quot;efficiency V&quot;.&lt;/p&gt;

&lt;p&gt;started with a stack of 64 Logs, screencap shows 63 on hotbar + 2 on piston after placing 1 that got duped to 2.&lt;/p&gt;</comment>
                            <comment id="51244" author="kumasasa" created="Sat, 9 Mar 2013 08:33:39 +0100"  >&lt;p&gt;Please attach a screenshot.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10102">
                    <name>Duplicate</name>
                                            <outwardlinks description="duplicates">
                                        <issuelink>
            <issuekey id="11903">MC-631</issuekey>
        </issuelink>
                            </outwardlinks>
                                                        </issuelinktype>
                    </issuelinks>
                <attachments>
                            <attachment id="23984" name="2013-03-09_00.34.02.png" size="1318839" author="oneeyedziggy" created="Sat, 9 Mar 2013 09:37:37 +0100"/>
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