Re: cursor for display segv

[Torsten Schoenfeld <kaffeetisch gmx de>]

On 30.11.2010 22:42, Kevin Ryde wrote:
> The program below gets a segv for me with i386 debian "experimental" gtk
> 2.22 and glib 2.27.3.

I can reproduce this with my development installation, but not with the 
system's gtk+.  The code in question has not changed in quite a few 
years.  I think the different results might be due to the conditional in 
_gdk_cursor_destroy:

  if (!private->display->closed && private->xcursor)
    XFreeCursor (GDK_DISPLAY_XDISPLAY (private->display), 
private->xcursor);

In the test case, private->display is garbage, so its closed member 
might come out true or false.

GdkCursor seems to simply assume that the GdkDisplay is valid throughout 
the cursor's lifetime, but it doesn't take a reference on it.  I don't 
think it's the bindings' responsibility to do something about this. 
GdkCursor should just take a reference on the display.  In the meantime, 
for your Perl code, I think you will have to keep the display around.