[webkit-dev] WebKit bug in Dashboard widget?

[Ben Kazez]

Hi everyone,

I'm working on a Dashboard widget with a multi-threaded Cocoa plugin.  
The plugin seems to be working just fine, but I'm getting an  
occasional (frequent but inconsistent) crash that appears to indicate  
a bug in WebKit:

======================================================
Exception:  EXC_BAD_ACCESS (0x0001)
Codes:      KERN_PROTECTION_FAILURE (0x0002) at 0x00000018

Thread 0 Crashed:
0   com.apple.WebCore              0x95c4a734 khtml::inlineWidth 
(khtml::RenderObject*, bool, bool) + 152
1   com.apple.WebCore              0x95c48b98  
khtml::RenderBlock::findNextLineBreak(khtml::BidiIterator&,  
khtml::BidiState&) + 3548
2   com.apple.WebCore              0x95c46dbc  
khtml::RenderBlock::layoutInlineChildren(bool) + 1980
3   com.apple.WebCore              0x95c435d4  
khtml::RenderBlock::layoutBlock(bool) + 692
4   com.apple.WebCore              0x95c4a49c  
khtml::RenderBlock::layoutPositionedObjects(bool) + 172
5   com.apple.WebCore              0x95c43930  
khtml::RenderBlock::layoutBlock(bool) + 1552
6   com.apple.WebCore              0x95c4409c  
khtml::RenderBlock::layoutBlockChildren(bool) + 696
7   com.apple.WebCore              0x95c435ec  
khtml::RenderBlock::layoutBlock(bool) + 716
8   com.apple.WebCore              0x95c40524  
khtml::RenderCanvas::layout() + 252
9   com.apple.WebCore              0x95c3fe08 KHTMLView::layout() + 792
10  com.apple.WebCore              0x95c52518 -[WebCoreBridge  
forceLayoutAdjustingViewSize:] + 56
11  com.apple.WebKit               0x959ce11c -[WebHTMLView  
layoutToMinimumPageWidth:maximumPageWidth:adjustingViewSize:] + 228
12  com.apple.WebKit               0x959e1328 -[WebHTMLView 
(WebPrivate) _web_layoutIfNeededRecursive] + 36
13  com.apple.WebKit               0x959cb8c0 -[WebHTMLView 
(WebPrivate) _propagateDirtyRectsToOpaqueAncestors] + 72
...
======================================================

The crash is preceded by incorrect width of displayed divs,  
disappearing elements, or both. Does this seem to you to be a WebKit  
bug, or could there be a problem with my code?

Ben