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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/204880">204880</a></dd>
<dt>Author</dt> <dd>zalan@apple.com</dd>
<dt>Date</dt> <dd>2016-08-23 19:23:19 -0700 (Tue, 23 Aug 2016)</dd>
</dl>

<h3>Log Message</h3>
<pre>ASSERTION FAILED: !view().layoutStateEnabled() || style().styleType() == FIRST_LETTER in WebCore::RenderInline::clippedOverflowRectForRepaint
https://bugs.webkit.org/show_bug.cgi?id=155363
&lt;rdar://problem/27720434&gt;

Reviewed by David Hyatt.

Source/WebCore:

Loosen ASSERT to include calls when the inline has a self painting layer. It's valid to end up here during layout when
the layer's composite state changes.

Test: fast/layers/assert-on-self-painting-inline-with-scrolling.html

* rendering/RenderInline.cpp:
(WebCore::RenderInline::clippedOverflowRectForRepaint):

LayoutTests:

* fast/layers/assert-on-self-painting-inline-with-scrolling-expected.txt: Added.
* fast/layers/assert-on-self-painting-inline-with-scrolling.html: Added.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsChangeLog">trunk/LayoutTests/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCorerenderingRenderInlinecpp">trunk/Source/WebCore/rendering/RenderInline.cpp</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsfastlayersassertonselfpaintinginlinewithscrollingexpectedtxt">trunk/LayoutTests/fast/layers/assert-on-self-painting-inline-with-scrolling-expected.txt</a></li>
<li><a href="#trunkLayoutTestsfastlayersassertonselfpaintinginlinewithscrollinghtml">trunk/LayoutTests/fast/layers/assert-on-self-painting-inline-with-scrolling.html</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkLayoutTestsChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/ChangeLog (204879 => 204880)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/ChangeLog        2016-08-24 02:19:50 UTC (rev 204879)
+++ trunk/LayoutTests/ChangeLog        2016-08-24 02:23:19 UTC (rev 204880)
</span><span class="lines">@@ -1,3 +1,14 @@
</span><ins>+2016-08-23  Zalan Bujtas  &lt;zalan@apple.com&gt;
+
+        ASSERTION FAILED: !view().layoutStateEnabled() || style().styleType() == FIRST_LETTER in WebCore::RenderInline::clippedOverflowRectForRepaint
+        https://bugs.webkit.org/show_bug.cgi?id=155363
+        &lt;rdar://problem/27720434&gt;
+
+        Reviewed by David Hyatt.
+
+        * fast/layers/assert-on-self-painting-inline-with-scrolling-expected.txt: Added.
+        * fast/layers/assert-on-self-painting-inline-with-scrolling.html: Added.
+
</ins><span class="cx"> 2016-08-23  Chris Dumez  &lt;cdumez@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         Add support for CanvasRenderingContext2D.resetTransform()
</span></span></pre></div>
<a id="trunkLayoutTestsfastlayersassertonselfpaintinginlinewithscrollingexpectedtxt"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/layers/assert-on-self-painting-inline-with-scrolling-expected.txt (0 => 204880)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/layers/assert-on-self-painting-inline-with-scrolling-expected.txt                                (rev 0)
+++ trunk/LayoutTests/fast/layers/assert-on-self-painting-inline-with-scrolling-expected.txt        2016-08-24 02:23:19 UTC (rev 204880)
</span><span class="lines">@@ -0,0 +1 @@
</span><ins>+PASS if no assert in debug.
</ins></span></pre></div>
<a id="trunkLayoutTestsfastlayersassertonselfpaintinginlinewithscrollinghtml"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/layers/assert-on-self-painting-inline-with-scrolling.html (0 => 204880)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/layers/assert-on-self-painting-inline-with-scrolling.html                                (rev 0)
+++ trunk/LayoutTests/fast/layers/assert-on-self-painting-inline-with-scrolling.html        2016-08-24 02:23:19 UTC (rev 204880)
</span><span class="lines">@@ -0,0 +1,25 @@
</span><ins>+&lt;!DOCTYPE html&gt;
+&lt;html&gt;
+&lt;head&gt;
+&lt;title&gt;This tests that inline does not assert when its composite state changes.&lt;/title&gt;
+&lt;script&gt;
+if (window.testRunner)
+    testRunner.dumpAsText();
+&lt;/script&gt;
+
+&lt;style&gt;
+ html, body {
+    overflow-x: scroll;
+    will-change: transform;
+}
+
+span {
+    mix-blend-mode: exclusion;
+}
+&lt;/style&gt;
+&lt;/head&gt;
+&lt;body&gt;
+PASS if no assert in debug.
+&lt;span class=&quot;class_0&quot;&gt;&lt;/span&gt;
+&lt;/body&gt;
+&lt;/html&gt;
</ins></span></pre></div>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (204879 => 204880)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2016-08-24 02:19:50 UTC (rev 204879)
+++ trunk/Source/WebCore/ChangeLog        2016-08-24 02:23:19 UTC (rev 204880)
</span><span class="lines">@@ -1,3 +1,19 @@
</span><ins>+2016-08-23  Zalan Bujtas  &lt;zalan@apple.com&gt;
+
+        ASSERTION FAILED: !view().layoutStateEnabled() || style().styleType() == FIRST_LETTER in WebCore::RenderInline::clippedOverflowRectForRepaint
+        https://bugs.webkit.org/show_bug.cgi?id=155363
+        &lt;rdar://problem/27720434&gt;
+
+        Reviewed by David Hyatt.
+
+        Loosen ASSERT to include calls when the inline has a self painting layer. It's valid to end up here during layout when
+        the layer's composite state changes.
+
+        Test: fast/layers/assert-on-self-painting-inline-with-scrolling.html
+
+        * rendering/RenderInline.cpp:
+        (WebCore::RenderInline::clippedOverflowRectForRepaint):
+
</ins><span class="cx"> 2016-08-23  Anders Carlsson  &lt;andersca@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         Create a phony WebKitLegacy framework that the WebCoreTestSupport dylib can find
</span></span></pre></div>
<a id="trunkSourceWebCorerenderingRenderInlinecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/rendering/RenderInline.cpp (204879 => 204880)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/rendering/RenderInline.cpp        2016-08-24 02:19:50 UTC (rev 204879)
+++ trunk/Source/WebCore/rendering/RenderInline.cpp        2016-08-24 02:23:19 UTC (rev 204880)
</span><span class="lines">@@ -1206,7 +1206,7 @@
</span><span class="cx"> LayoutRect RenderInline::clippedOverflowRectForRepaint(const RenderLayerModelObject* repaintContainer) const
</span><span class="cx"> {
</span><span class="cx">     // Only first-letter renderers are allowed in here during layout. They mutate the tree triggering repaints.
</span><del>-    ASSERT(!view().layoutStateEnabled() || style().styleType() == FIRST_LETTER);
</del><ins>+    ASSERT(!view().layoutStateEnabled() || style().styleType() == FIRST_LETTER || hasSelfPaintingLayer());
</ins><span class="cx"> 
</span><span class="cx">     if (!firstLineBoxIncludingCulling() &amp;&amp; !continuation())
</span><span class="cx">         return LayoutRect();
</span></span></pre>
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