Created attachment 174669 [details]
short demonstration of this

I noticed that my application causes a sigfault in gtk_main_quit when it was closed over the win32 taskbar menu.

I wrote a small test-application to verify this.
This application causes glib warnings when the win32 Taskbar menu is opened:

(test_statusbar.exe:5568): GLib-WARNING **: g_main_context_prepare() called recursively from within a source's check() or prepare() member.
(test_statusbar.exe:5568): GLib-WARNING **: g_main_context_check() called recursively from within a source's check() or prepare() member.

When the test-application is closed over the taskbar menu, functions which were added over gtk_timeout_add are triggered after gtk_main_quit has been called.

All other methods to close the application are working well: (ALT+F4), close with application button, close with win32 frame, close with taskmanager.

(test_statusbar.exe:4808): GLib-WARNING **: g_main_context_check() called recursively from within a source'

(test_statusbar.exe:4808): GLib-WARNING **: g_main_context_prepare() called recursively from within a sourc

When I close the test-application over the taskbar-menu, you can see that the idle_add_fuction causes warnings AFTER gtk_main_quit gas been called.

console output of test-app:

(test_statusbar.exe:4808): GLib-WARNING **: g_main_context_check() called recursively from within a source'
I ran through my_exit!!
This is after gtk_main_quit!!

(test_statusbar.exe:4808): GLib-GObject-WARNING **: invalid uninstantiatable type `<invalid>' in cast to `G

(test_statusbar.exe:4808): Gtk-CRITICAL **: gtk_label_set_text: assertion `GTK_IS_LABEL (label)' failed



Version:
glib_2.24.0-2_win32
glib-dev_2.24.0-2_win32
pkg-config_0.23-3_win32
pkg-config-dev_0.23-3_win32
atk_1.30.0-1_win32
atk-dev_1.30.0-1_win32
pango_1.28.0-1_win32
pango-dev_1.28.0-1_win32
cairo_1.8.10-3_win32
cairo-dev_1.8.10-3_win32
fontconfig_2.8.0-2_win32
fontconfig-dev_2.8.0-2_win32
expat_2.0.1-1_win32
expat-dev_2.0.1-1_win32
freetype_2.3.12-1_win32
freetype-dev_2.3.12-1_win32
libpng_1.4.0-1_win32
libpng-dev_1.4.0-1_win32
zlib_1.2.4-1_win32
zlib-dev_1.2.4-1_win32
gtk+_2.20.0-1_win32
gtk+-dev_2.20.0-1_win32