[gtk+osx] problem with focus remaining on destroyed window

[Charles B. <C.C...@dl...>]

Hi,

I am playing with gtkglarea under OS X.  One of the test cases, viewlw, 
closes a window which often has the focus.  When running
outside a debugger the memory pointed to by 
MacCarbonEvents::mac_gwind_grabbed often seems to be legit, so the mouse
events code in mouse_motion_handler() gives a sigsev.  Inside the 
debugger I can confirm that the gdk_window_internal_destroy()
function clears the memory, but then the app does not crash.

The simplest workaround that I have found is to extend the test on line 
201 of MacCarbonEvents.c to also test the values of
mac_gwind_grabbed, and confirm that it is valid by comparing 
mac_gwind_grabbed to mac_gwind_grabbed->magic

e.g.

     if(win_ref && mac_gwind_grabbed && mac_gwin_grabbed == 
mac_gwind_grabbed->magic) {

Ta,

Charles Ballard