Bug 13751 – Reproducible assertion failure when double-clicking SVG text

• Component: SVG
• Status: RESOLVED FIXED

[Gera Weiss]

Webkit crashes when I double click the text in the following SVG.


<?xml version="1.0"?>
<svg xmlns="http://www.w3.org/2000/svg"
 xmlns:xlink="http://www.w3.org/1999/xlink" onload="init()">
 <script><![CDATA[
 var flag=1;
 var c;
 
 function init() {
  	c= document.getElementById("use")
  	setInterval("loop()",250);
 }
 
 function loop() {
  	c.setAttributeNS("http://www.w3.org/1999/xlink","href","#rec"+flag)
  	flag=1-flag;
}
]]>
</script>


<symbol shape-rendering="optimizeSpeed" id="rec0" viewBox="0 0 64 64">
    <rect width="59" height="59" x="5" y="5" fill="red" />
    <text x="17" y="56" font-size="60" pointer-events="none" > A </text>
 </symbol>


<symbol shape-rendering="optimizeSpeed" id="rec1" viewBox="0 0 64 64">
    <rect width="59" height="59" x="5" y="5" fill="magenta" />
    <text x="17" y="56" font-size="60" pointer-events="none" > B </text>
 </symbol>

<use id="use" xlink:href="#rec0"/> 

</svg>

[David Kilzer (:ddkilzer)]

Created attachment 14591 [details]
Test case from Comment #0

[David Kilzer (:ddkilzer)]

Confirmed with a local debug build of WebKit r21517 using Safari 2.0.4 (419.3) on Mac OS X 10.4.9 (8P135).

I'm not sure if this test uses disabled SVG features not present in ToT, so I'm erring on the side of caution and making this a P1 since it's a reproducible crasher.

Note that you may have to double-click more than once to trigger the crash.

Console output:

ASSERTION FAILED: nodeA
(/path/to/WebKit/WebCore/editing/htmlediting.cpp:86 int WebCore::comparePositions(const WebCore::Position&, const WebCore::Position&))
Bus error

Stack trace:

Exception:  EXC_BAD_ACCESS (0x0001)
Codes:      KERN_PROTECTION_FAILURE (0x0002) at 0x00000000

Thread 0 Crashed:
0   com.apple.WebCore              	0x012c8bd4 WebCore::Node::shadowAncestorNode() + 28 (Node.cpp:1094)
1   com.apple.WebCore              	0x01249a70 WebCore::comparePositions(WebCore::Position const&, WebCore::Position const&) + 228 (htmlediting.cpp:92)
2   com.apple.WebCore              	0x0126a73c WebCore::SelectionController::contains(WebCore::IntPoint const&) + 604 (SelectionController.cpp:1029)
3   com.apple.WebCore              	0x0148db9c WebCore::HitTestResult::isSelected() const + 168 (HitTestResult.cpp:131)
4   com.apple.WebKit               	0x003bc1d0 -[WebElementDictionary _isSelected] + 76 (WebElementDictionary.mm:213)
5   com.apple.WebKit               	0x003bbc24 -[WebElementDictionary objectForKey:] + 300 (WebElementDictionary.mm:147)
6   com.apple.WebKit               	0x003518e4 -[WebHTMLView _isSelectionEvent:] + 256 (WebHTMLView.mm:2730)
7   com.apple.WebKit               	0x00351ca4 -[WebHTMLView shouldDelayWindowOrderingForEvent:] + 232 (WebHTMLView.mm:2761)
8   com.apple.AppKit               	0x937fcd08 -[NSWindow sendEvent:] + 1664
9   com.apple.Safari               	0x00021734 0x1000 + 132916
10  com.apple.AppKit               	0x937a68d4 -[NSApplication sendEvent:] + 4172
11  com.apple.Safari               	0x00021238 0x1000 + 131640
12  com.apple.AppKit               	0x9379dd10 -[NSApplication run] + 508
13  com.apple.AppKit               	0x9388e87c NSApplicationMain + 452
14  com.apple.Safari               	0x0005c77c 0x1000 + 374652
15  com.apple.Safari               	0x0005c624 0x1000 + 374308

[Nikolas Zimmermann]

HTML Editing makes assumptions which are not valid for SVG. Check in detail.

[Oliver Hunt]

Nothing can make this crash on my system, dave can you still repro?

[David Kilzer (:ddkilzer)]

I can't reproduce this with a local debug build of WebKit r24285 with Safari 3.0 (522.12) on Mac OS X 10.4.10 (8R218).  Closing as RESOLVED/FIXED.