WebKit crash

WebKitCrash.m

// When the dom node is [object HTMLObjectElement]
// element is not a valid object ==> crash

- (void)mouseMoved:(NSEvent *)theEvent {
	NSPoint mouseLocation = [self.webView convertPoint:[theEvent locationInWindow] fromView:nil];
	mouseLocation.y = [self.webView frame].size.height - mouseLocation.y;
	
	id element2 = [[self.webView windowScriptObject] evaluateWebScript:[NSString stringWithFormat:@"document.elementFromPoint(%f,%f);", mouseLocation.x, mouseLocation.y]];
	id element = [[self.webView windowScriptObject] evaluateWebScript:[NSString stringWithFormat:@"\"result: \" + document.elementFromPoint(%f,%f)", mouseLocation.x, mouseLocation.y]];

	NSLog(@"element %@, %@", element, element2);
}

So my theory is that the bridge from JS object to ObjC object is failing for [object HTMLObjectElement]