[Gtk-osx-users] Bug: global_event_filter_func crashes every startup trying to send "type" message

[Philip R. <ph...@gm...>]

Hello again,

When I build and run RawTherapee (
https://code.google.com/p/rawtherapee/source/checkout), it always crashes
on startup in gtkosxapplication:

(lldb) bt
* thread #1: tid = 0xb3c104, 0x00007fff96bc20dd
libobjc.A.dylib`objc_msgSend + 29, queue = 'com.apple.main-thread', stop
reason = EXC_BAD_ACCESS (code=1, address=0x30)
    frame #0: 0x00007fff96bc20dd libobjc.A.dylib`objc_msgSend + 29
  * frame #1: 0x000000010252a547
libgtkmacintegration-gtk2.2.dylib`global_event_filter_func(windowing_event=0x00007fff5fbfe8c8,
event=0x0000000105caddf0, user_data=0x00000001058fb8a0) + 55 at
gtkosxapplication_quartz.c:514
    frame #2: 0x0000000101974290 libgdk-x11-2.0.0.dylib`gdk_event_translate
+ 79
    frame #3: 0x0000000101975bd2 libgdk-x11-2.0.0.dylib`_gdk_events_queue +
173
    frame #4: 0x0000000101976f1b libgdk-x11-2.0.0.dylib`gdk_event_dispatch
+ 35
    frame #5: 0x00000001013f7909
libglib-2.0.0.dylib`g_main_context_dispatch + 282
    frame #6: 0x00000001013f7bf5 libglib-2.0.0.dylib`g_main_context_iterate
+ 413
    frame #7: 0x00000001013f7e3f libglib-2.0.0.dylib`g_main_loop_run + 195
    frame #8: 0x000000010163327c libgtk-x11-2.0.0.dylib`gtk_main + 180
    frame #9: 0x0000000101dfaccd
libgtkmm-2.4.1.dylib`Gtk::Main::run(Gtk::Window&) + 157
    frame #10: 0x000000010039544f rawtherapee`main(argc=1,
argv=0x00007fff5fbffb18) + 9071 at main.cc:284
    frame #11: 0x00007fff938ee5c9 libdyld.dylib`start + 1

I'm not sure of the underlying reason, but the crash is right here:
  if ([nsevent type] == NSKeyDown &&
      gtkosx_application_use_quartz_accelerators (app) )
    {
global_event_filter_func runs this code unconditionally, causing the crash
in this case because the "type" message is sent to an invalid object
(nsevent).

As a hack, filtering out GDK_NOTHING as the value of event->type fixes the
crash and the application works fine as far as I can tell.

I have Mac OS X 10.10.1 and GTK 2.24.25, and I used the XCode compiler for
both the application and gtkosxapplication. Let me know if I can provide
any further information.

Philip Ries