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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-9186] Water does not leak through leaves and regular stairs but upside down stairs</title>
                <link>https://bugs.mojang.com/browse/MC-9186</link>
                <project id="10400" key="MC">Minecraft: Java Edition</project>
                    <description>&lt;p&gt;Water (still or flowing) does not drip through leaf blocks, even though rain does.&lt;/p&gt;

&lt;p&gt;Water also seems not to penetrate certain other blocks that it should. These are all transparent variants as far as I can tell. Stairs - stop leaks, upside down stairs - leak; upper slabs - leak, lower slabs - don&apos;t leak; ice - doesn&apos;t leak; and even water itself, if you have a free-floating water block, it doesn&apos;t so much as dribble.&lt;/p&gt;

&lt;p&gt;See also &lt;a href=&quot;https://bugs.mojang.com/browse/MC-8858&quot; title=&quot;Rain goes through upside-down stairs&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-8858&quot;&gt;&lt;del&gt;MC-8858&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</description>
                <environment>Mac Os 10.5.8, oldish 3GB iMac</environment>
        <key id="22730">MC-9186</key>
            <summary>Water does not leak through leaves and regular stairs but upside down stairs</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="simons mith">Simons Mith</reporter>
                        <labels>
                            <label>dripping</label>
                            <label>leak</label>
                            <label>leaves</label>
                            <label>stairs</label>
                            <label>water</label>
                    </labels>
                <created>Mon, 4 Feb 2013 19:14:03 +0100</created>
                <updated>Tue, 10 Jul 2018 19:47:23 +0200</updated>
                            <resolved>Tue, 10 Jul 2018 19:47:23 +0200</resolved>
                                    <version>Snapshot 13w05b</version>
                    <version>Snapshot 13w09a</version>
                    <version>Snapshot 13w09b</version>
                    <version>Snapshot 13w09c</version>
                    <version>Minecraft 1.5</version>
                    <version>Minecraft 1.5.1</version>
                    <version>Minecraft 1.5.2</version>
                    <version>Snapshot 13w18c</version>
                    <version>Snapshot 13w19a</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 1.8</version>
                    <version>Minecraft 1.8.1-pre3</version>
                    <version>Minecraft 15w46a</version>
                    <version>Minecraft 1.9.2</version>
                    <version>Minecraft 16w15a</version>
                    <version>Minecraft 16w15b</version>
                    <version>Minecraft 1.9.3 Pre-Release 2</version>
                    <version>Minecraft 1.9.4</version>
                    <version>Minecraft 16w20a</version>
                    <version>Minecraft 1.10.2</version>
                    <version>Minecraft 16w43a</version>
                    <version>Minecraft 1.11.2</version>
                    <version>Minecraft 17w13b</version>
                    <version>Minecraft 1.12 Pre-Release 6</version>
                    <version>Minecraft 1.12.1</version>
                    <version>Minecraft 1.12.2</version>
                    <version>Minecraft 18w07a</version>
                    <version>Minecraft 18w11a</version>
                    <version>Minecraft 18w20c</version>
                    <version>Minecraft 18w22c</version>
                    <version>Minecraft 1.13-pre2</version>
                    <version>Minecraft 1.13-pre5</version>
                                    <fixVersion>Minecraft 1.13-pre7</fixVersion>
                                                        <votes>12</votes>
                                    <watches>6</watches>
                                                                            <comments>
                            <comment id="469427" author="asteraoth" created="Tue, 10 Jul 2018 19:41:25 +0200"  >&lt;p&gt;Fixed in 1.13-pre7&lt;/p&gt;</comment>
                            <comment id="465038" author="asteraoth" created="Fri, 29 Jun 2018 14:36:01 +0200"  >&lt;p&gt;Confirmed for 1.13-pre5&lt;/p&gt;</comment>
                            <comment id="461033" author="asteraoth" created="Sat, 16 Jun 2018 23:44:00 +0200"  >&lt;p&gt;Confirmed for 1.13-pre2&lt;/p&gt;</comment>
                            <comment id="457477" author="asteraoth" created="Sat, 2 Jun 2018 03:17:35 +0200"  >&lt;p&gt;Confirmed for 18w22c&lt;/p&gt;</comment>
                            <comment id="453773" author="asteraoth" created="Sat, 19 May 2018 06:04:19 +0200"  >&lt;p&gt;Confirmed for 18w20c&lt;/p&gt;</comment>
                            <comment id="441418" author="asteraoth" created="Wed, 14 Mar 2018 16:45:05 +0100"  >&lt;p&gt;Confirmed for 18w11a&lt;/p&gt;</comment>
                            <comment id="435110" author="asteraoth" created="Thu, 15 Feb 2018 01:49:24 +0100"  >&lt;p&gt;Confirmed for 18w07a&lt;/p&gt;</comment>
                            <comment id="417979" author="asteraoth" created="Tue, 14 Nov 2017 00:50:39 +0100"  >&lt;p&gt;Confirmed for 17w45b&lt;/p&gt;</comment>
                            <comment id="375680" author="asteraoth" created="Sun, 2 Apr 2017 23:30:56 +0200"  >&lt;p&gt;Confirmed for 17w13b&lt;/p&gt;</comment>
                            <comment id="306415" author="asteraoth" created="Sun, 22 May 2016 02:09:41 +0200"  >&lt;p&gt;Confirmed for 16w20a&lt;/p&gt;</comment>
                            <comment id="304750" author="asteraoth" created="Sun, 15 May 2016 09:12:42 +0200"  >&lt;p&gt;Confirmed for 1.9.4&lt;/p&gt;</comment>
                            <comment id="302559" author="asteraoth" created="Mon, 2 May 2016 02:10:14 +0200"  >&lt;p&gt;Confirm for 1.9.3 pre-2&lt;/p&gt;</comment>
                            <comment id="300071" author="asteraoth" created="Wed, 13 Apr 2016 23:54:15 +0200"  >&lt;p&gt;Confirmed for 16w15a and 16w15b&lt;/p&gt;</comment>
                            <comment id="265714" author="swekob" created="Tue, 17 Nov 2015 18:29:54 +0100"  >&lt;p&gt;Confirmed for 15w46a&lt;/p&gt;</comment>
                            <comment id="147439" author="garyclosse" created="Sat, 15 Mar 2014 22:10:56 +0100"  >&lt;p&gt;Confirmed for 14w10c and 14w11b&lt;/p&gt;</comment>
                            <comment id="143879" author="garyclosse" created="Sat, 1 Mar 2014 20:00:36 +0100"  >&lt;p&gt;Still a concern in 1.7.4/5 and 14w08a&lt;/p&gt;</comment>
                            <comment id="55287" author="bugi74" created="Tue, 19 Mar 2013 00:15:15 +0100"  >&lt;p&gt;This issue still in 1.5.&lt;/p&gt;</comment>
                            <comment id="55248" author="bugi74" created="Mon, 18 Mar 2013 23:18:52 +0100"  >&lt;p&gt;For me, on 1.5, both wood and brick stairs produce similar effect. And while the effects is a little bit like &quot;why do they leak?&quot;, it is actually a different issue, and probably will be considered a feature.&lt;/p&gt;

&lt;p&gt;At least I could not see any water effects (well) below the stair blocks (unless they were also horizontally right next to a stairs block). Such drops would have indicated &quot;leaking&quot;, which this particular JIRA issue is about.&lt;/p&gt;

&lt;p&gt;Technically, at least what I saw, was not the dripping (droplets drop down from block&apos;s bottom side), but &quot;splashes&quot; (splash up and back down on block&apos;s top surface). However, the splashing (and dripping) only consider a single level for the whole block to start from, and since stairs have two levels on the &quot;up&quot; side, it works a little bit better when the effect starts at the half-block level. For the other taller side of stairs, this means the splashes will be inside the block. And that is what at least I could see, the rare splashes that started near the inner surface.&lt;/p&gt;

&lt;p&gt;It is possible to &quot;fix&quot; that (as the necessary methods to get the proper surface do exist), but it might be a bit inefficient, and it would certainly be worthy of another issue, for Mojang to decide.&lt;/p&gt;</comment>
                            <comment id="55242" author="gigermann" created="Mon, 18 Mar 2013 23:10:32 +0100"  >&lt;p&gt;Attached image&lt;/p&gt;</comment>
                            <comment id="55238" author="kumasasa" created="Mon, 18 Mar 2013 22:58:35 +0100"  >&lt;p&gt;Use &quot;More Actions&quot; -&amp;gt; &quot;Attach file&quot; for attaching screenshots. &lt;b&gt;Not&lt;/b&gt; &quot;Attach Screenshot&quot;&lt;/p&gt;</comment>
                            <comment id="55232" author="gigermann" created="Mon, 18 Mar 2013 22:51:33 +0100"  >&lt;p&gt;Attachments not cooperating; &lt;a href=&quot;http://www.drlgraphics.com/images/Minecraft/driperrorexample.png&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://www.drlgraphics.com/images/Minecraft/driperrorexample.png&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Can&apos;t really show the &quot;drip&quot; without video &lt;img class=&quot;emoticon&quot; src=&quot;https://bugs.mojang.com/images/icons/emoticons/tongue.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/p&gt;</comment>
                            <comment id="55220" author="bugi74" created="Mon, 18 Mar 2013 22:29:39 +0100"  >&lt;p&gt;That description is a bit difficult to understand, could you attach a screenshot which shows the setup?&lt;/p&gt;</comment>
                            <comment id="55173" author="gigermann" created="Mon, 18 Mar 2013 21:34:58 +0100"  >&lt;p&gt;I have a leaky roof of brick stairs, rightside-up, dripping from the upper seam (not the lower, apparently). FWIW, it seems similar to the way light &quot;leaks&quot; through the seams on stairs as well. v1.5&lt;/p&gt;

&lt;p&gt;Edit: Actually, it might be more accurate to say that it drips from the joins where there is an air-block to either side of it&lt;/p&gt;

&lt;p&gt;Further Edit: It occurs to me now that I did NOT see this when the roof was wood, only after I switched to brick&lt;/p&gt;</comment>
                            <comment id="49118" author="bugi74" created="Sat, 2 Mar 2013 18:34:29 +0100"  >&lt;p&gt;&lt;b&gt;Fix&lt;/b&gt;&lt;/p&gt;
&lt;div class=&quot;code panel&quot; style=&quot;border-width: 1px;&quot;&gt;&lt;div class=&quot;codeHeader panelHeader&quot; style=&quot;border-bottom-width: 1px;&quot;&gt;&lt;b&gt;BlockFluid.randomDisplayTick()&lt;/b&gt;&lt;/div&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; (random.nextInt(10) == 0
                &lt;span class=&quot;code-comment&quot;&gt;//&amp;amp;&amp;amp; world.doesBlockHaveSolidTopSurface(x, y - 1, z)
&lt;/span&gt;                &amp;amp;&amp;amp; world.getBlockMaterial(x, y - 1, z).blocksMovement()
                &amp;amp;&amp;amp; !world.getBlockMaterial(x, y - 2, z).blocksMovement()) {
            var21 = (&lt;span class=&quot;code-object&quot;&gt;double&lt;/span&gt;) ((&lt;span class=&quot;code-object&quot;&gt;float&lt;/span&gt;) x + random.nextFloat());
            var22 = (&lt;span class=&quot;code-object&quot;&gt;double&lt;/span&gt;) y - 1.05D; &lt;span class=&quot;code-comment&quot;&gt;// &amp;lt;== MC-1390 ?
&lt;/span&gt;            var23 = (&lt;span class=&quot;code-object&quot;&gt;double&lt;/span&gt;) ((&lt;span class=&quot;code-object&quot;&gt;float&lt;/span&gt;) z + random.nextFloat());

            &lt;span class=&quot;code-keyword&quot;&gt;if&lt;/span&gt; (&lt;span class=&quot;code-keyword&quot;&gt;this&lt;/span&gt;.blockMaterial == Material.water) {
                world.spawnParticle(&lt;span class=&quot;code-quote&quot;&gt;&quot;dripWater&quot;&lt;/span&gt;, var21, var22, var23, 0.0D, 0.0D, 0.0D);
            } &lt;span class=&quot;code-keyword&quot;&gt;else&lt;/span&gt; {
                world.spawnParticle(&lt;span class=&quot;code-quote&quot;&gt;&quot;dripLava&quot;&lt;/span&gt;, var21, var22, var23, 0.0D, 0.0D, 0.0D);
            }
        }
&lt;/pre&gt;
&lt;/div&gt;&lt;/div&gt;

&lt;p&gt;Fix tested on 1.4.7, also with fences, iron bars, glass block. Not tested on everything, but if something does not work right, that just means a bit more logic into that if.&lt;/p&gt;</comment>
                            <comment id="49117" author="bugi74" created="Sat, 2 Mar 2013 18:30:04 +0100"  >&lt;p&gt;Affects 13w09c. Related to &lt;a href=&quot;https://bugs.mojang.com/browse/MC-1390&quot; title=&quot;Upper slabs with water/lava on top makes midair dripping water/lava&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-1390&quot;&gt;&lt;del&gt;MC-1390&lt;/del&gt;&lt;/a&gt; (seems the bugs are just few lines apart). And fix incoming.&lt;/p&gt;</comment>
                            <comment id="43507" author="kumasasa" created="Mon, 4 Feb 2013 20:14:34 +0100"  >&lt;p&gt;Confirmed.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10102">
                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="57831">MC-35869</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10103">
                    <name>Relates</name>
                                            <outwardlinks description="relates to">
                                        <issuelink>
            <issuekey id="22153">MC-8858</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="12718">MC-1390</issuekey>
        </issuelink>
                            </outwardlinks>
                                                        </issuelinktype>
                    </issuelinks>
                <attachments>
                            <attachment id="21054" name="2013-02-04_20.12.41.png" size="578766" author="kumasasa" created="Mon, 4 Feb 2013 20:14:34 +0100"/>
                            <attachment id="21055" name="2013-02-04_20.12.50.png" size="637233" author="kumasasa" created="Mon, 4 Feb 2013 20:14:34 +0100"/>
                            <attachment id="25476" name="driperrorexample.png" size="375817" author="gigermann" created="Mon, 18 Mar 2013 23:10:32 +0100"/>
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