http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47850
--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> 2011-02-23 09:04:03 UTC --- The problem is that for integer,parameter :: C_INDEX(8) = unpack( & vector = [(i,i=1,size(SENSOR_CHANNEL))], & mask = [(any(SENSOR_CHANNEL(i) == NLTE_CHANNEL), & i=lbound(SENSOR_CHANNEL,1),ubound(SENSOR_CHANNEL,1))], & the mask is not regarded as gfc_is_constant_expr -> gfc_constant_ac.