http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57075
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> 2013-04-26 11:23:13 UTC --- b.c: In function ‘bar’: b.c:17:1: error: control flow in the middle of basic block 2 <bb 2>: _5 = __builtin_printf ("$"); D.1727 = _5;