<html>
<head>
<base href="https://bugs.webkit.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - WebKit assert in WebCore::VisiblePosition::previous() displaying youtube video"
href="https://bugs.webkit.org/show_bug.cgi?id=154905">154905</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>WebKit assert in WebCore::VisiblePosition::previous() displaying youtube video
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
</tr>
<tr>
<th>Version</th>
<td>Other
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>Normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P2
</td>
</tr>
<tr>
<th>Component</th>
<td>HTML Editing
</td>
</tr>
<tr>
<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>richcoe2@gmail.com
</td>
</tr></table>
<p>
<div>
<pre>I've been facing core dumps in the application liferea for a long time (months) that was always in WebKit javascript library, but because debug was not available I did not have more information.
WebKit version 2.4.9 Linux x86_64
It reproduces fairly often, so I finally got around to compiling a debug version to get a proper traceback to the issue. This is my first results with debug.
When I view video's from youtube embedded in a displayed web page, I get a crash. Sometimes it happens after viewing 3 or 4 videos, sometimes after viewing only one.
In this instance, I had just started the application and had finished watching a short video.
I restarted the video from the beginning and then clicked on video itself.
ASSERTION FAILED: prev != *this
../../Source/WebCore/editing/VisiblePosition.cpp(89) : WebCore::VisiblePosition WebCore::VisiblePosition::previous(WebCore::EditingBoundaryCrossingRule) const
#0 0x00007fae13530f47 in WTFCrash() () at ../../Source/WTF/wtf/Assertions.cpp:333
#1 0x00007fae15ece33b in WebCore::VisiblePosition::previous(WebCore::EditingBoundaryCrossingRule) const (this=0x7fff3dd371b0, rule=WebCore::CanCrossEditingBoundary) at ../../Source/WebCore/editing/VisiblePosition.cpp:89
#2 0x00007fae15edb0d4 in WebCore::isStartOfDocument(WebCore::VisiblePosition const&) (p=...)
at ../../Source/WebCore/editing/VisibleUnits.cpp:1411
#3 0x00007fae15e846ef in WebCore::FrameSelection::selectFrameElementInParentIfFullySelected() (this=0x336b580)
at ../../Source/WebCore/editing/FrameSelection.cpp:1638
#4 0x00007fae15e7dbad in WebCore::FrameSelection::setSelection(WebCore::VisibleSelection const&, unsigned int, WebCore::FrameSelection::CursorAlignOnScroll, WebCore::TextGranularity) (this=0x336b580, newSelection=..., options=6, align=WebCore::FrameSelection::AlignCursorOnScrollIfNeeded, granularity=WebCore::CharacterGranularity)
at ../../Source/WebCore/editing/FrameSelection.cpp:322
#5 0x00007fae162d0c46 in WebCore::DOMSelection::addRange(WebCore::Range*) (this=0x49ddfb0, r=0x3d6d170)
at ../../Source/WebCore/page/DOMSelection.cpp:395
#6 0x00007fae167c7e68 in WebCore::jsDOMSelectionPrototypeFunctionAddRange(JSC::ExecState*) (exec=0x7fad9c5d6e10) at DerivedSources/WebCore/JSDOMSelection.cpp:476
#7 0x00007fadabfff0e5 in ()
#8 0x00007fad9c5d6e60 in ()
#9 0x00007fae13327981 in llint_op_call () at /usr/local/lib64/libjavascriptcoregtk-3.0.so.0
#10 0x00007fadabfff920 in ()
#11 0x000000000261b4f0 in ()
Python Exception <type 'exceptions.OverflowError'> long too big to convert:
Python Exception <type 'exceptions.OverflowError'> long too big to convert:
#12 0xffffffffffffffff in ()
#13 0xffffffffffffffff in ()
#14 0x0000000001a19e10 in ()
#15 0x0000000000000000 in ()
(gdb) up
#1 0x00007fae15ece33b in WebCore::VisiblePosition::previous (this=0x7fff3dd371b0,
rule=WebCore::CanCrossEditingBoundary) at ../../Source/WebCore/editing/VisiblePosition.cpp:89
89 ASSERT(prev != *this);
(gdb) p prev
$1 = {m_deepPosition = {m_anchorNode = {m_ptr = 0x3fb7220}, m_offset = 0, m_anchorType = 0,
m_isLegacyEditingPosition = true}, m_affinity = WebCore::DOWNSTREAM}
(gdb) print this
$2 = (const WebCore::VisiblePosition * const) 0x7fff3dd371b0
(gdb) p &prev
$3 = (WebCore::VisiblePosition *) 0x7fff3dd37080
(gdb) p *this
$4 = {m_deepPosition = {m_anchorNode = {m_ptr = 0x3fb7220}, m_offset = 0, m_anchorType = 0,
m_isLegacyEditingPosition = true}, m_affinity = WebCore::DOWNSTREAM}
(gdb) p pos
$5 = {m_anchorNode = {m_ptr = 0x2114740}, m_offset = 0, m_anchorType = 0, m_isLegacyEditingPosition = true}</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>