http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57586
jgreenhalgh at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jgreenhalgh at gcc dot gnu.org --- Comment #2 from jgreenhalgh at gcc dot gnu.org --- Created attachment 30292 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30292&action=edit Working testcase Modifying the '1' in: counter *c = &((counter_wrapper *)(1))->y; To something more aligned like a '4' as in the attached file and in: counter *c = &((counter_wrapper *)(4))->y; causes compilation to proceed as expected without an ICE.