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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-3808] Power components (buttons, pressure plates, detector rails, etc) sometimes output too short pulse</title>
                <link>https://bugs.mojang.com/browse/MC-3808</link>
                <project id="10400" key="MC">Minecraft: Java Edition</project>
                    <description>&lt;p&gt;Detector rails normally activate for ~20 ticks (depends on how fast the minecart goes) Sometimes though they randomly activate for something that looks like half of that normal time even if the minecart moves with the same speed.&lt;br/&gt;
To set up an experiment, create ~ 3x5 loop with some powered rails and a detector rail. Launch an empty minecart. Output the signal from the detector into a line of ~15 repeaters on 1 tick delay. Observe gaps in the output change in size sometimes.&lt;br/&gt;
P.S. This might relate to a bug which made a button to sometimes produce a shorter pulse, which I can&apos;t reproduce in 1.4.5 so far.&lt;/p&gt;</description>
                <environment>Win7x64, Java1.7.0_04</environment>
        <key id="15980">MC-3808</key>
            <summary>Power components (buttons, pressure plates, detector rails, etc) sometimes output too short pulse</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="kimitsu">Kimitsu Desu</reporter>
                        <labels>
                            <label>detector</label>
                            <label>minecart</label>
                            <label>rail</label>
                    </labels>
                <created>Sat, 24 Nov 2012 23:24:32 +0100</created>
                <updated>Sun, 3 May 2015 06:22:47 +0200</updated>
                            <resolved>Sat, 11 Oct 2014 20:59:22 +0200</resolved>
                                    <version>Minecraft 1.4.5</version>
                    <version>Snapshot 13w05b</version>
                    <version>Minecraft 1.5.1</version>
                    <version>Minecraft 1.5.2</version>
                    <version>Snapshot 13w24a</version>
                    <version>Snapshot 13w24b</version>
                    <version>Snapshot 13w25a</version>
                    <version>Snapshot 13w25b</version>
                    <version>Minecraft 1.7.4</version>
                    <version>Minecraft 14w05b</version>
                                    <fixVersion>Minecraft 1.8</fixVersion>
                                                        <votes>4</votes>
                                    <watches>6</watches>
                                                                            <comments>
                            <comment id="223326" author="xerool" created="Tue, 31 Mar 2015 01:46:42 +0200"  >&lt;p&gt;duplicates &lt;a href=&quot;https://bugs.mojang.com/browse/MC-56541&quot; title=&quot;Redstone torches (and other redstone components) have inconsistent timings&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-56541&quot;&gt;&lt;del&gt;MC-56541&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;edit:&lt;br/&gt;
and yes its fixed now&lt;/p&gt;</comment>
                            <comment id="203083" author="kumasasa" created="Sat, 11 Oct 2014 20:59:22 +0200"  >&lt;p&gt;No answer for a long time, assuming fixed.&lt;/p&gt;</comment>
                            <comment id="168207" author="themoogle" created="Thu, 26 Jun 2014 15:24:01 +0200"  >&lt;p&gt;Does this issue still happen in 14w26b? I recently committed a fix that removes random block ticking from redstone devices.&lt;/p&gt;</comment>
                            <comment id="133373" author="galaxy_2alex" created="Tue, 21 Jan 2014 23:53:09 +0100"  >&lt;p&gt;Is this still a concern in the &lt;em&gt;current Minecraft version&lt;/em&gt; &lt;b&gt;1.7.4&lt;/b&gt; / Launcher version &lt;b&gt;1.3.8&lt;/b&gt; or later? If so, please &lt;em&gt;update the affected versions&lt;/em&gt; in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.&lt;/p&gt;</comment>
                            <comment id="127425" author="kimitsu" created="Fri, 27 Dec 2013 04:23:05 +0100"  >&lt;p&gt;Yes, it is.&lt;/p&gt;</comment>
                            <comment id="127404" author="irunor" created="Fri, 27 Dec 2013 01:42:01 +0100"  >&lt;p&gt;Is this the same thing that causes buttons to have random pulse lengths? (e.g. go to open an iron door and have to close before you even have the chance to move)&lt;/p&gt;</comment>
                            <comment id="57122" author="kimitsu" created="Mon, 25 Mar 2013 05:48:39 +0100"  >&lt;p&gt;Still an issue in 1.5.1&lt;/p&gt;</comment>
                            <comment id="56721" author="banana478" created="Sat, 23 Mar 2013 22:56:46 +0100"  >&lt;p&gt;Is this still a concern in the current Minecraft version (1.5.1)? 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="43808" author="bugi74" created="Tue, 5 Feb 2013 21:05:23 +0100"  >&lt;p&gt;I have no idea how the redstone stuff is being improved in the snapshots, but at least the timing differences &lt;em&gt;used&lt;/em&gt; to be caused due to the random world updates randomly hitting the victim redstone device. They happen somewhat rarely per block, and if they need to also happen during a small time window, it is even more rare. Just my one cent that might even be worthless now.&lt;/p&gt;

&lt;p&gt;(Maybe Mojang has excluded redstone stuff from those random world updates now.. maybe not.. or maybe they forgot just some specific devices from the exclusion.)&lt;/p&gt;</comment>
                            <comment id="43805" author="kimitsu" created="Tue, 5 Feb 2013 20:51:29 +0100"  >&lt;p&gt;Indeed, still present in 13w05b. You have to wait for it for like 10 minutes, but it&apos;s there. Same with buttons, I beleive...&lt;/p&gt;</comment>
                            <comment id="43779" author="bljat" created="Tue, 5 Feb 2013 19:26:51 +0100"  >&lt;p&gt;Is this still a concern in the current Minecraft version? 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="26405" author="kimitsu" created="Mon, 3 Dec 2012 06:37:58 +0100"  >&lt;p&gt;3x4 loop might be always on because of either directional stuff, or the way you start minecart, which is by pushing in your case...&lt;br/&gt;
It&apos;s still weird that the bug doesn&apos;t seem to show up though. I get it consistently in my setup. Should I post the world savefile?&lt;br/&gt;
Actually, it is downloadable at &lt;a href=&quot;http://kimitsudesu.net/files/minecraft/sv.zip&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://kimitsudesu.net/files/minecraft/sv.zip&lt;/a&gt;&lt;br/&gt;
The coordinates are shown on the screenshot.&lt;/p&gt;</comment>
                            <comment id="26217" author="kumasasa" created="Sun, 2 Dec 2012 13:06:41 +0100"  >&lt;p&gt;Cannot reproduce.&lt;br/&gt;
Rebuilt your setup, but there&apos;s a discrepancy in your description:&lt;br/&gt;
You wrote in the text, the issue would occur with a 3 x 5 loop, but your screenshot shows a 3 x 4 loop.&lt;br/&gt;
With a 3x4 loop the output signal of the detector rail is permanently on&lt;/p&gt;

&lt;p&gt;Stared for several minutes on the screen, but never saw a shorter pulse on the 3 x 5 loop.&lt;/p&gt;</comment>
                            <comment id="24868" author="kimitsu" created="Sun, 25 Nov 2012 19:19:54 +0100"  >&lt;p&gt;Attached a screenshot and a forced crash report.&lt;/p&gt;</comment>
                            <comment id="24759" author="kumasasa" created="Sun, 25 Nov 2012 09:28:05 +0100"  >&lt;p&gt;Can you please press F3 + C for 10 seconds to force a crash and attach the resulting crash report here ?&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10102">
                    <name>Duplicate</name>
                                            <outwardlinks description="duplicates">
                                        <issuelink>
            <issuekey id="83208">MC-56541</issuekey>
        </issuelink>
                            </outwardlinks>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="31852">MC-16044</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="36817">MC-18450</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="72872">MC-47237</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="16603">MC-4173</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                    </issuelinks>
                <attachments>
                            <attachment id="14254" name="2012-11-25_22.15.17.png" size="574644" author="kimitsu" created="Sun, 25 Nov 2012 19:19:25 +0100"/>
                            <attachment id="14589" name="2012-12-02_13.02.51.png" size="902130" author="kumasasa" created="Sun, 2 Dec 2012 13:03:36 +0100"/>
                            <attachment id="21130" name="2013-02-05_23.46.01.png" size="580811" author="kimitsu" created="Tue, 5 Feb 2013 20:51:29 +0100"/>
                            <attachment id="26219" name="2013-03-25_08.46.39.png" size="343655" author="kimitsu" created="Mon, 25 Mar 2013 05:48:39 +0100"/>
                            <attachment id="14253" name="crash-2012-11-25_22.16.02-client.txt" size="3551" author="kimitsu" created="Sun, 25 Nov 2012 19:19:25 +0100"/>
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