http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47670
Peter de Rivaz <argondsgn at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |CLOSED --- Comment #4 from Peter de Rivaz <argondsgn at gmail dot com> 2011-02-09 21:54:15 UTC --- Thanks! (And sorry for the invalid report). C99 specification 6.5 para 5 agrees that this is undefined behaviour. Both suggestions solve the problem. I've closed the bug now.