https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71639
--- Comment #5 from Frank Bergemann <frank67x at gmail dot com> --- I also tested on HP-UX with gcc-4.7.2. HP-UX ### B.11.31 U ia64 4035416745 unlimited-user license And it's also ok on HP-UX: hpux03 506> ./test using push_back(): ================== 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 2, 4, 6, 8, 10, using initializer list: ======================= 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 2, 4, 6, 8, 10,