https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82866
--- Comment #2 from G. Steinmetz <gs...@t-online.de> --- Slightly different : $ cat z7.f90 module m type t(a, :, *) end type end $ cat z7s.f90 subroutine s type t(a, :, *) end type end $ cat z8.f90 module m type t(*, a, :) end type end $ cat z8s.f90 subroutine s type t(*, a, :) end type end $ gfortran-8-20171105 -c z7.f90 f951: internal compiler error: Segmentation fault 0xb60fdf crash_signal ../../gcc/toplev.c:324 0x66541b delete_root ../../gcc/fortran/bbt.c:150 0x6655ee gfc_delete_bbt(void*, void*, int (*)(void*, void*)) ../../gcc/fortran/bbt.c:197 0x71dc88 gfc_delete_symtree(gfc_symtree**, char const*) ../../gcc/fortran/symbol.c:2925 0x71f456 gfc_restore_last_undo_checkpoint() ../../gcc/fortran/symbol.c:3694 0x6ddfe7 reject_statement ../../gcc/fortran/parse.c:2546 0x6de0fc match_word_omp_simd ../../gcc/fortran/parse.c:98 0x6e20eb match_word ../../gcc/fortran/parse.c:565 0x6e20eb decode_statement ../../gcc/fortran/parse.c:565 0x6e35c4 next_free ../../gcc/fortran/parse.c:1225 0x6e35c4 next_statement ../../gcc/fortran/parse.c:1457 0x6e53ec parse_spec ../../gcc/fortran/parse.c:3651 0x6e84d8 parse_module ../../gcc/fortran/parse.c:5900 0x6e8ec9 gfc_parse_file() ../../gcc/fortran/parse.c:6213 0x72d3bf gfc_be_parse_file ../../gcc/fortran/f95-lang.c:204