Version details: Debian's 2.6.4-1

GLib's option parser removes '-' from argv. This breaks programs which read from
stdin (several GTK+ applications recently stopped working because of this).

Test case:

#include <stdio.h>
#include <gtk/gtk.h>

int main(int argc, char **argv) {
	GOptionContext *option_context;

	option_context = g_option_context_new (NULL);
	g_option_context_set_ignore_unknown_options (option_context, TRUE);

	printf("argv[1] = %s\n", argv[1]);
	g_option_context_parse (option_context, &argc, &argv, NULL);
	printf("argv[1] = %s\n", argv[1]);

	return 0;
}

This produces:

$ cc `pkg-config --cflags --libs gtk+-2.0`    t.c   -o t
$ ./t -
argv[1] = -
argv[1] = (null)