https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78801
--- Comment #1 from Gerhard Steinmetz <gerhard.steinmetz.fort...@t-online.de> --- With option -O0 : $ gfortran-7-20161211 -O0 -c z1.f90 z1.f90:2:0: character(8) :: g internal compiler error: in convert_move, at expr.c:228 0x92d1ec convert_move(rtx_def*, rtx_def*, int) ../../gcc/expr.c:228 0x92d28a convert_modes(machine_mode, machine_mode, rtx_def*, int) ../../gcc/expr.c:684 0x985967 assign_parm_setup_stack ../../gcc/function.c:3430 0x98bc78 assign_parms ../../gcc/function.c:3785 0x98e74b expand_function_start(tree_node*) ../../gcc/function.c:5220 0x824765 execute ../../gcc/cfgexpand.c:6248