http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41165
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2011-03-07 10:11:36 UTC --- As shown by pr47850, the problem is not restricted to PRODUCT, but likely to the whole list in http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29962#c3.