http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52510
--- Comment #3 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> 2012-03-07 20:34:57 UTC --- A reghunt revealed that this patch (r184876) is indeed the culprit: 2012-03-03 Jason Merrill <ja...@redhat.com> Core 1270 * call.c (build_aggr_conv): Call reshape_init. (convert_like_real): Likewise. * typeck2.c (process_init_constructor): Clear TREE_CONSTANT if not all constant. Jason, could you please have a look? Thanks. Rainer