[Bug fortran/85779] New: ICE in gfc_typename, at fortran/misc.c:156

["gscfq at t-online dot de" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85779

            Bug ID: 85779
           Summary: ICE in gfc_typename, at fortran/misc.c:156
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

With invalid code, down to at least 4.8 :


$ cat z1.f90
type(t) function f()
   type f
   end type
end


$ cat z2.f90
type(t) function f() result(z)
   type z
   end type
end


$ gfortran-9-20180513 -c z1.f90
f951: internal compiler error: Segmentation fault
0xb9f4bf crash_signal
        ../../gcc/toplev.c:325
0x6de45c gfc_typename(gfc_typespec*)
        ../../gcc/fortran/misc.c:156
0x69d9b6 gfc_match_derived_decl()
        ../../gcc/fortran/decl.c:9964
0x6f7139 match_word_omp_simd
        ../../gcc/fortran/parse.c:93
0x6fc0b1 match_word
        ../../gcc/fortran/parse.c:265
0x6fc0b1 decode_specification_statement
        ../../gcc/fortran/parse.c:265
0x6fc0b1 decode_statement
        ../../gcc/fortran/parse.c:314
0x6fc754 next_free
        ../../gcc/fortran/parse.c:1230
0x6fc754 next_statement
        ../../gcc/fortran/parse.c:1462
0x6fe56c parse_spec
        ../../gcc/fortran/parse.c:3670
0x700533 parse_progunit
        ../../gcc/fortran/parse.c:5667
0x701ec1 gfc_parse_file()
        ../../gcc/fortran/parse.c:6221
0x748adf gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:204