https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61637
David Edelsohn <dje at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |EH Target| |powerpc-ibm-aix Depends on| |28586 --- Comment #20 from David Edelsohn <dje at gcc dot gnu.org> --- This probably is related to PR 28586. The detail that the failure occurs when exceptions are thrown within constructors was important. MD_FALLBACK_FRAME_STATE_FOR has been implemented to 32 bit AIX but not 64 bit AIX. That probably explains why this works in 32 bit mode but not 64 bit mode.