[Bug fortran/99368] New: ICE in build_function_decl, at fortran/trans-decl.c:2381

["gscfq@t-online.de" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99368

            Bug ID: 99368
           Summary: ICE in build_function_decl, at
                    fortran/trans-decl.c:2381
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

This issue depends on alphabetical order of involved names,
that is, case z1 gives an ICE ("x"<"y"), z2 gives an error.
Special case: same name. Affects versions down to at least r5.


$ diff z1.f90 z2.f90
6c6
<       namelist /x/ y
---
>       namelist /z/ y


$ cat z1.f90
program p
   type y
   end type
contains
   subroutine s
      namelist /x/ y
      character(3) y
   end
end


$ cat z2.f90
program p
   type y
   end type
contains
   subroutine s
      namelist /z/ y
      character(3) y
   end
end


$ gfortran-11-20210228 -c z2.f90
z2.f90:6:17:

    6 |       namelist /z/ y
      |                 1
Error: PROCEDURE attribute conflicts with NAMELIST attribute in 'y' at (1)


$ gfortran-11-20210228 -c z1.f90
z1.f90:2:9:

    2 |    type y
      |         1
internal compiler error: in build_function_decl, at fortran/trans-decl.c:2381
0x752129 build_function_decl
        ../../gcc/fortran/trans-decl.c:2378
0x759a6c gfc_get_symbol_decl(gfc_symbol*)
        ../../gcc/fortran/trans-decl.c:1756
0x75c9a5 generate_namelist_decl
        ../../gcc/fortran/trans-decl.c:5241
0x75ce8e generate_local_nml_decl
        ../../gcc/fortran/trans-decl.c:6147
0x71af42 do_traverse_symtree
        ../../gcc/fortran/symbol.c:4170
0x75d011 generate_local_vars
        ../../gcc/fortran/trans-decl.c:6157
0x75d011 gfc_generate_function_code(gfc_namespace*)
        ../../gcc/fortran/trans-decl.c:6815
0x75cfe4 gfc_generate_contained_functions
        ../../gcc/fortran/trans-decl.c:5874
0x75cfe4 gfc_generate_function_code(gfc_namespace*)
        ../../gcc/fortran/trans-decl.c:6812
0x6e3a46 translate_all_program_units
        ../../gcc/fortran/parse.c:6351
0x6e3a46 gfc_parse_file()
        ../../gcc/fortran/parse.c:6620
0x72fd7f gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:212