[Qt-interest] Crash in FrameLoaderClientQt

[Tony Rietwyk]

No-one has responded.  

I created a bug report in task tracker on 28th Sep, 4:44pm GMT +10:00.  I
have not received a reply yet - not even a confirmation of receipt for the
bug!  

After using Qt for two years, the task tracker STILL doesn't give a receipt
number! Pathetic! 

Does it ask for a customer number? No! 

Does it list XCode as a compiler?  No! 

As a commercial customer, how can I get better service from Qt Software? 

Tony Rietwyk

Username: tonyrisi
Customer ID: 43682
License ID: 1534298


> -----Original Message-----
> From: qt-interest-bounces at trolltech.com 
> [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Tony Rietwyk
> Sent: Thursday, 24 September 2009 18:06
> To: qt-interest at trolltech.com
> Subject: [Qt-interest] Crash in FrameLoaderClientQt
> 
> 
> Hi Everybody! 
> 
> I have a strange problem running my program on Mac 10.5.8 
> with Qt 4.5.2 on iMac with XCode 3.1.2. 
> 
> The program displays web pages from the local file system via 
> QWebPage.  The pages have <object> tags in them.  When the 
> pages are loaded, I attach a QWebPluginFactory derived class, 
> and its plugins method is called.  For each object tag, the 
> factory's create method is called, and it creates and returns 
> a widget to be displayed in the HTML. 
> 
> This works fine on Windows, and I am pretty sure worked on 
> Mac using 4.5.0.  Now in 4.5.2, when I run the debug build, 
> and go to load the pages, the program stops between loading 
> the first page and having the factory's plugins override 
> called.  The debugger console shows: 
> 
> Debugger() was called!
> 
> The Debugger has exited with status 0.
> 
> Then I set a breakpoint, anywhere in my code and run the 
> program again.  Now I get a bunch of messages saying that the 
> debugger is loading the program and cannot find the symbols 
> for each of the Qt modules.  I go to load the pages, and the 
> program stops again.  This time the debugger shows the stack, 
> and clicking Continue, the program works OK - the widgets are 
> displayed in the HTML and I can navigate from page to page.  
> The top of the stack has: 
> 
> __pthread_kill
> pthread_kill
> Debugger
> dyld_stub_pthread_cond_broadcast
> NP_initialize
> PluginPackage.load
> PluginPackage.fetchInfo
> PluginPackage.createPackage
> PluginDatabase.refresh
> PluginDatabase.installedPlugins
> FrameLoaderClientQt.objectContentType
> HTMLPluginImageElement.isImageType
> HTMLObjectElement.parseMappedAttribute
> ...
> 
> 1) In XCode, how do I find out what the exception / signal / 
> whatever is causing the program to stop?  I don't see 
> anything like access violation, memory read error or anything 
> like that. 
> 
> 2) How can get the full stack trace into a text file to send 
> to Nokia support? 
> 
> 3) Why does the program stop, but continue OK in debug mode?  
> On Windows in Visual Studio, continuing after an exception 
> just raises the exception again.  (I suppose this depends on 
> the what the actual error is.)
> 
> 4) Webkit appears to be trying to refresh the list of image 
> plugins, but this is failing.  The program has already 
> started, and displays both png and svg images OK, so I would 
> have expected Qt's image plugins to already be loaded.  
> 
> Sorry if this is a known error, but without knowing what the 
> actual error is, its hard to do any searching! 
> 
> Any other suggestions welcome! 
> 
> Tony.