https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85620
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- http://pubs.opengroup.org/onlinepubs/007904975/functions/getcontext.html If the ucp argument was created with getcontext(), program execution continues as if the corresponding call of getcontext() had just returned. That means it does return twice.
