<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE bugzilla SYSTEM "https://bugs.webkit.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.4.1"
          urlbase="https://bugs.webkit.org/"
          
          maintainer="admin@webkit.org"
>

    <bug>
          <bug_id>91359</bug_id>
          
          <creation_ts>2012-07-15 22:33:30 -0700</creation_ts>
          <short_desc>REGRESSION (r122681): css3/flexbox/flexbox-overflow-auto.html is failing</short_desc>
          <delta_ts>2012-07-16 09:32:53 -0700</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>WebKit</product>
          <component>WebCore Misc.</component>
          <version>528+ (Nightly build)</version>
          <rep_platform>Unspecified</rep_platform>
          <op_sys>Unspecified</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>FIXED</resolution>
          
          
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords>Regression</keywords>
          <priority>P1</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Chris Dumez">cdumez</reporter>
          <assigned_to name="Nobody">webkit-unassigned</assigned_to>
          <cc>andersca</cc>
    
    <cc>gyuyoung.kim</cc>
    
    <cc>lucas.de.marchi</cc>
    
    <cc>mitz</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>670084</commentid>
    <comment_count>0</comment_count>
    <who name="Chris Dumez">cdumez</who>
    <bug_when>2012-07-15 22:33:30 -0700</bug_when>
    <thetext>After http://trac.webkit.org/r122681 the following ref test is failing:
  css3/flexbox/flexbox-overflow-auto.html

The reason for the failure is that a few scrollbars are no longer in their expected position:
http://build.webkit.org/results/EFL%20Linux%2064-bit%20Release/r122681%20(2660)/css3/flexbox/flexbox-overflow-auto-diffs.html</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>670088</commentid>
    <comment_count>1</comment_count>
    <who name="">mitz</who>
    <bug_when>2012-07-15 22:36:24 -0700</bug_when>
    <thetext>The issue reproduces on OS X as well when overlay scroll bars are disabled.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>670092</commentid>
    <comment_count>2</comment_count>
    <who name="Chris Dumez">cdumez</who>
    <bug_when>2012-07-15 22:41:09 -0700</bug_when>
    <thetext>Skipping the test for EFL port in Bug 91360. Please unskip with proper fix, thanks.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>670093</commentid>
    <comment_count>3</comment_count>
      <attachid>152479</attachid>
    <who name="">mitz</who>
    <bug_when>2012-07-15 22:46:43 -0700</bug_when>
    <thetext>Created attachment 152479
Only skip notifyContentAreaScrolled() if the scroll position doesn’t change</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>670131</commentid>
    <comment_count>4</comment_count>
    <who name="Chris Dumez">cdumez</who>
    <bug_when>2012-07-16 00:00:28 -0700</bug_when>
    <thetext>On the EFL debug bot, a lot of tests started crashing after r122681:
http://build.webkit.org/builders/EFL%20Linux%2064-bit%20Debug/builds/2819

I haven&apos;t tested if the proposed patch fixes the crash in debug mode as well.

backtrace:
crash log for DumpRenderTree (pid 25888):
STDOUT: &lt;empty&gt;
STDERR: SHOULD NEVER BE REACHED
STDERR: /home/buildslave-1/webkit-buildslave/efl-linux-64-debug/build/Source/WebCore/platform/ScrollableArea.h(136) : virtual WebCore::IntPoint WebCore::ScrollableArea::scrollPosition() const
STDERR: 1   0x7fa26f7e8d72 WebCore::ScrollableArea::scrollPosition() const
STDERR: 2   0x7fa26f7e8272 WebCore::ScrollableArea::scrollPositionChanged(WebCore::IntPoint const&amp;)
STDERR: 3   0x7fa26f7e8533 WebCore::ScrollableArea::setScrollOffsetFromAnimation(WebCore::IntPoint const&amp;)
STDERR: 4   0x7fa26f7e7c4b WebCore::ScrollAnimator::notifyPositionChanged()
STDERR: 5   0x7fa26f7e75e3 WebCore::ScrollAnimator::scrollToOffsetWithoutAnimation(WebCore::FloatPoint const&amp;)
STDERR: 6   0x7fa26f7e812c WebCore::ScrollableArea::scrollToOffsetWithoutAnimation(WebCore::FloatPoint const&amp;)
STDERR: 7   0x7fa26f7e81f2 WebCore::ScrollableArea::scrollToOffsetWithoutAnimation(WebCore::ScrollbarOrientation, float)
STDERR: 8   0x7fa26f9e62fa WebCore::RenderListBox::computeLogicalHeight()
STDERR: 9   0x7fa26f8e97ee WebCore::RenderBlock::layoutBlock(bool, WebCore::FractionalLayoutUnit)
STDERR: 10  0x7fa26f8e8abe WebCore::RenderBlock::layout()
STDERR: 11  0x7fa26f9e5736 WebCore::RenderListBox::layout()
STDERR: 12  0x7fa26f8bd519 WebCore::RenderObject::layoutIfNeeded()
STDERR: 13  0x7fa26f93bf79 WebCore::RenderBlock::LineBreaker::nextLineBreak(WebCore::BidiResolver&lt;WebCore::InlineIterator, WebCore::BidiRun&gt;&amp;, WebCore::LineInfo&amp;, std::pair&lt;WebCore::RenderText*, WebCore::LazyLineBreakIterator&gt;&amp;, WebCore::RenderBlock::FloatingObject*, unsigned int)
STDERR: 14  0x7fa26f936421 WebCore::RenderBlock::layoutRunsAndFloatsInRange(WebCore::LineLayoutState&amp;, WebCore::BidiResolver&lt;WebCore::InlineIterator, WebCore::BidiRun&gt;&amp;, WebCore::InlineIterator const&amp;, WebCore::BidiStatus const&amp;, unsigned int)
STDERR: 15  0x7fa26f93609b WebCore::RenderBlock::layoutRunsAndFloats(WebCore::LineLayoutState&amp;, bool)
STDERR: 16  0x7fa26f938234 WebCore::RenderBlock::layoutInlineChildren(bool, WebCore::FractionalLayoutUnit&amp;, WebCore::FractionalLayoutUnit&amp;)
STDERR: 17  0x7fa26f8e95ab WebCore::RenderBlock::layoutBlock(bool, WebCore::FractionalLayoutUnit)
STDERR: 18  0x7fa26f8e8abe WebCore::RenderBlock::layout()
STDERR: 19  0x7fa26f8ee8ce WebCore::RenderBlock::layoutBlockChild(WebCore::RenderBox*, WebCore::RenderBlock::MarginInfo&amp;, WebCore::FractionalLayoutUnit&amp;, WebCore::FractionalLayoutUnit&amp;)
STDERR: 20  0x7fa26f8ee3b0 WebCore::RenderBlock::layoutBlockChildren(bool, WebCore::FractionalLayoutUnit&amp;)
STDERR: 21  0x7fa26f8e95cc WebCore::RenderBlock::layoutBlock(bool, WebCore::FractionalLayoutUnit)
STDERR: 22  0x7fa26f8e8abe WebCore::RenderBlock::layout()
STDERR: 23  0x7fa26f8ee8ce WebCore::RenderBlock::layoutBlockChild(WebCore::RenderBox*, WebCore::RenderBlock::MarginInfo&amp;, WebCore::FractionalLayoutUnit&amp;, WebCore::FractionalLayoutUnit&amp;)
STDERR: 24  0x7fa26f8ee3b0 WebCore::RenderBlock::layoutBlockChildren(bool, WebCore::FractionalLayoutUnit&amp;)
STDERR: 25  0x7fa26f8e95cc WebCore::RenderBlock::layoutBlock(bool, WebCore::FractionalLayoutUnit)
STDERR: 26  0x7fa26f8e8abe WebCore::RenderBlock::layout()
STDERR: 27  0x7fa26f8ee8ce WebCore::RenderBlock::layoutBlockChild(WebCore::RenderBox*, WebCore::RenderBlock::MarginInfo&amp;, WebCore::FractionalLayoutUnit&amp;, WebCore::FractionalLayoutUnit&amp;)
STDERR: 28  0x7fa26f8ee3b0 WebCore::RenderBlock::layoutBlockChildren(bool, WebCore::FractionalLayoutUnit&amp;)
STDERR: 29  0x7fa26f8e95cc WebCore::RenderBlock::layoutBlock(bool, WebCore::FractionalLayoutUnit)
STDERR: 30  0x7fa26f8e8abe WebCore::RenderBlock::layout()
STDERR: 31  0x7fa26fa62cc4 WebCore::RenderView::layout()</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>670401</commentid>
    <comment_count>5</comment_count>
    <who name="">mitz</who>
    <bug_when>2012-07-16 09:32:53 -0700</bug_when>
    <thetext>This has been fixed in &lt;http://trac.webkit.org/r122701&gt; by reverting r122681.</thetext>
  </long_desc>
      
          <attachment
              isobsolete="0"
              ispatch="1"
              isprivate="0"
          >
            <attachid>152479</attachid>
            <date>2012-07-15 22:46:43 -0700</date>
            <delta_ts>2012-07-16 09:22:53 -0700</delta_ts>
            <desc>Only skip notifyContentAreaScrolled() if the scroll position doesn’t change</desc>
            <filename>91359_r1.diff</filename>
            <type>text/plain</type>
            <size>1758</size>
            <attacher>mitz</attacher>
            
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    </bug>

</bugzilla>