https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82622
--- Comment #3 from G. Steinmetz <gs...@t-online.de> --- Backtrace for example z2 from comment 1 : (with new snapshot, configured with --enable-checking=yes) $ gfortran-8-20171022 -c z2.f90 z2.f90:1:0: program p internal compiler error: tree check: expected array_type, have record_type in gfc_conv_array_initializer, at fortran/trans-array.c:5881 0x60eaa1 tree_check_failed(tree_node const*, char const*, int, char const*, ...) ../../gcc/tree.c:9098 0x76c493 tree_check(tree_node*, char const*, int, char const*, tree_code) ../../gcc/tree.h:3094 0x76c493 gfc_conv_array_initializer(tree_node*, gfc_expr*) ../../gcc/fortran/trans-array.c:5881 0x7a4dd0 gfc_conv_initializer(gfc_expr*, gfc_typespec*, tree_node*, bool, bool, bool) ../../gcc/fortran/trans-expr.c:6805 0x7a5621 gfc_conv_structure(gfc_se*, gfc_expr*, int) ../../gcc/fortran/trans-expr.c:7708 0x7a4fb1 gfc_conv_initializer(gfc_expr*, gfc_typespec*, tree_node*, bool, bool, bool) ../../gcc/fortran/trans-expr.c:6840 0x78945c gfc_get_symbol_decl(gfc_symbol*) ../../gcc/fortran/trans-decl.c:1819 0x78d1d7 generate_local_decl ../../gcc/fortran/trans-decl.c:5493 0x744f4b do_traverse_symtree ../../gcc/fortran/symbol.c:4157 0x78dfa2 generate_local_vars ../../gcc/fortran/trans-decl.c:5693 0x78dfa2 gfc_generate_function_code(gfc_namespace*) ../../gcc/fortran/trans-decl.c:6357 0x712e40 translate_all_program_units ../../gcc/fortran/parse.c:6088 0x712e40 gfc_parse_file() ../../gcc/fortran/parse.c:6291 0x75819f gfc_be_parse_file ../../gcc/fortran/f95-lang.c:204