[Bug fortran/102715] New: [12 Regression] ICE in gfc_simplify_transpose, at fortran/simplify.c:8184

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102715

            Bug ID: 102715
           Summary: [12 Regression] ICE in gfc_simplify_transpose, at
                    fortran/simplify.c:8184
           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: ---

Changed between 20211003 and 20211010 :
(follow-up of pr102520)


$ cat z1.f90
program p
   type t
   end type
   type(t), parameter :: a(4) = t()
   type(t), parameter :: b(2,2) = reshape(a, [2])
   type(t), parameter :: c(2,2) = transpose(b)
end


$ gfortran-12-20211003 -c z1.f90
z1.f90:5:31:

    5 |    type(t), parameter :: b(2,2) = reshape(a, [2])
      |                               1
Error: Incompatible ranks 2 and 1 in assignment at (1)


$ gfortran-12-20211010 -c z1.f90
f951: internal compiler error: Segmentation fault
0xd43fcf crash_signal
        ../../gcc/toplev.c:326
0x82d8f0 gfc_simplify_transpose(gfc_expr*)
        ../../gcc/fortran/simplify.c:8184
0x7aa66a do_simplify
        ../../gcc/fortran/intrinsic.c:4657
0x7b50ba gfc_intrinsic_func_interface(gfc_expr*, int)
        ../../gcc/fortran/intrinsic.c:5050
0x8078e9 resolve_unknown_f
        ../../gcc/fortran/resolve.c:2937
0x8078e9 resolve_function
        ../../gcc/fortran/resolve.c:3281
0x8078e9 gfc_resolve_expr(gfc_expr*)
        ../../gcc/fortran/resolve.c:7115
0x79a244 gfc_reduce_init_expr(gfc_expr*)
        ../../gcc/fortran/expr.c:3125
0x79d4b0 gfc_match_init_expr(gfc_expr**)
        ../../gcc/fortran/expr.c:3173
0x787c74 variable_decl
        ../../gcc/fortran/decl.c:3016
0x787c74 gfc_match_data_decl()
        ../../gcc/fortran/decl.c:6325
0x7f01d3 match_word
        ../../gcc/fortran/parse.c:65
0x7f01d3 decode_statement
        ../../gcc/fortran/parse.c:376
0x7f1c1a next_free
        ../../gcc/fortran/parse.c:1384
0x7f1c1a next_statement
        ../../gcc/fortran/parse.c:1616
0x7f333b parse_spec
        ../../gcc/fortran/parse.c:4151
0x7f610c parse_progunit
        ../../gcc/fortran/parse.c:6117
0x7f7891 gfc_parse_file()
        ../../gcc/fortran/parse.c:6658
0x84480f gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:216