glibmm_mainloop test: Allocate a thread on the stack.
glibmm_mainloop test: Allocate a thread on the stack.

As suggested by Kjell Ahlstedt:
https://bugzilla.gnome.org/show_bug.cgi?id=757674#c10

GNOME/glibmm,GNOME/glibmm,GNOME/glibmm,GNOME/glibmm,GNOME/glibmm