[maemo-developers] [gtkmm] Gdk::Pixbuf::create_from_file() segmentation fault in maemo

[From: Murray Cumming]

On Mon, 2008-06-02 at 15:25 +0800, Dinh Khac Thanh wrote:
> Hi all,
> 
> I got problem trying to load an image to a gtkmm using pixbuf's
> create_from_file() in scratchbox. Here is the snippet of code:
>   std::auto_ptr<Glib::Error> err;
> 
>             cout << "Start to load logo" <<endl;
>             image =
> Gdk::Pixbuf::create_from_file("./icons/logo.png",err);
>             Glib::ustring err_str = err2->what();

You need to check pointers for NULL before dereferencing them. That's
basic C++. For instance;

if(err)
  std::cout << "Error message = " << err->what() << std::endl;
else
  std::cout << "Succeeded" << std::endl;
  
>             cout << "Error message = " << err_str<<endl;
>             cout << "Finish to load logo" <<endl;
> These lines are taken from a DrawingArea widget's constructor with
> 'image' variable of type Glib::RefPtr<Gdk::Pixbuf>.
> 
> The output is:
> 
> Start to load i2rlogo
> qemu: uncaught target signal 11 (Segmentation fault) - exiting
> 
> if I change the path to the image file that makes it wrong path, no
> segmentation fault error:
> 
> Start to load logo
> Error message = Failed to open file './icons/home.png': No such file
> or directory
> Finish to load logo
> 
> Could anyone suggest the reason behind this? 
> 
> Regards
> 
> _______________________________________________
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> maemo-developers at maemo.org
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-- 
Murray Cumming
murrayc at murrayc.com
www.murrayc.com
www.openismus.com