https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119669
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> --- I can: /opt/notnfs/gcc-bisect/obj/gcc/f951.r15-9357 -quiet pr119669.f90 f951.r15-9357: internal compiler error: in compare_parameter, at fortran/interface.cc:2537 0x2d42e37 internal_error(char const*, ...) ../../gcc/diagnostic-global-context.cc:517 0x2d11f8d fancy_abort(char const*, int, char const*) ../../gcc/diagnostic.cc:1749 0x473ce0 compare_parameter ../../gcc/fortran/interface.cc:2537 0x476d0b gfc_compare_actual_formal(gfc_actual_arglist**, gfc_formal_arglist*, int, int, bool, locus*) ../../gcc/fortran/interface.cc:3494 0x6a3a55 check_externals_procedure ../../gcc/fortran/frontend-passes.cc:5712 0x6a3c24 check_externals_code ../../gcc/fortran/frontend-passes.cc:5759 0x6a1a1a gfc_code_walker(gfc_code**, int (*)(gfc_code**, int*, void*), int (*)(gfc_expr**, int*, void*), void*) ../../gcc/fortran/frontend-passes.cc:5317 0x6a3f8e gfc_check_externals0 ../../gcc/fortran/frontend-passes.cc:5840 0x6a4022 gfc_check_externals(gfc_namespace*) ../../gcc/fortran/frontend-passes.cc:5862 0x5054fa gfc_parse_file() ../../gcc/fortran/parse.cc:7660 0x572deb gfc_be_parse_file ../../gcc/fortran/f95-lang.cc:241 Please submit a full bug report, with preprocessed source (by using -freport-bug). Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions. It is an assertion failure, so might not reproduce with --disable-checking.