[Bug fortran/103508] New: ICE in gfc_find_symtree, at fortran/symbol.c:2979

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103508

            Bug ID: 103508
           Summary: ICE in gfc_find_symtree, at fortran/symbol.c:2979
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Affects versions down to at least r5 :


$ cat z1.f90
program p
   type t(n)
      integer, len :: n = 1
      character(n) :: c
   end type
   block
      block
         type(t(3)) :: x
         x%c = 'abc'
         print *, len(x%c)
      end
   end
end


$ gfortran-12-20211128 -c z1.f90
z1.f90:11:9:

   11 |       end
      |         1
Error: END BLOCK statement expected at (1)
f951: internal compiler error: Segmentation fault
0xf0942f crash_signal
        ../../gcc/toplev.c:322
0x87a999 gfc_find_symtree(gfc_symtree*, char const*)
        ../../gcc/fortran/symbol.c:2979
0x87d157 gfc_find_sym_tree(char const*, gfc_namespace*, int, gfc_symtree**)
        ../../gcc/fortran/symbol.c:3224
0x87d2ae gfc_get_ha_sym_tree(char const*, gfc_symtree**)
        ../../gcc/fortran/symbol.c:3452
0x809fbe gfc_match_sym_tree(gfc_symtree**, int)
        ../../gcc/fortran/match.c:680
0x841bec match_variable
        ../../gcc/fortran/primary.c:4012
0x80a916 gfc_match(char const*, ...)
        ../../gcc/fortran/match.c:1137
0x80c1dd gfc_match_assignment()
        ../../gcc/fortran/match.c:1315
0x835a40 match_word
        ../../gcc/fortran/parse.c:67
0x835a40 decode_statement
        ../../gcc/fortran/parse.c:363
0x83753a next_free
        ../../gcc/fortran/parse.c:1397
0x83753a next_statement
        ../../gcc/fortran/parse.c:1629
0x83ad40 parse_executable
        ../../gcc/fortran/parse.c:5935
0x83c05f parse_progunit
        ../../gcc/fortran/parse.c:6205
0x83afbc parse_block_construct
        ../../gcc/fortran/parse.c:4873
0x83afbc parse_executable
        ../../gcc/fortran/parse.c:5786
0x83c05f parse_progunit
        ../../gcc/fortran/parse.c:6205
0x83d2a1 gfc_parse_file()
        ../../gcc/fortran/parse.c:6724
0x88b37f gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:216