[Bug fortran/84868] New: [7/8 Regression] ICE in gfc_conv_descriptor_offset, at fortran/trans-array.c:208

[gscfq@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84868

            Bug ID: 84868
           Summary: [7/8 Regression] ICE in gfc_conv_descriptor_offset, at
                    fortran/trans-array.c:208
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Changed between 20161204 and 20161211 :


$ cat z1.f90
module m
   character(:), allocatable :: c
contains
   function f(n) result(z)
      character, parameter :: c(3) = ['x', 'y', 'z']
      integer, intent(in) :: n
      character(len_trim(c(n))) :: z
      z = c(n)
   end
end
program p
   use m
   print *, f(2)
end


$ gfortran-7-20161204 -c z1.f90
$
$ gfortran-8-20180311 -c z1.f90
z1.f90:13:0:

    print *, f(2)

internal compiler error: in gfc_conv_descriptor_offset, at
fortran/trans-array.c:208
0x74e222 gfc_conv_descriptor_offset
        ../../gcc/fortran/trans-array.c:208
0x75349c gfc_conv_descriptor_offset_get(tree_node*)
        ../../gcc/fortran/trans-array.c:220
0x75349c gfc_conv_array_offset(tree_node*)
        ../../gcc/fortran/trans-array.c:2967
0x75349c gfc_conv_array_ref(gfc_se*, gfc_array_ref*, gfc_expr*, locus*)
        ../../gcc/fortran/trans-array.c:3575
0x780ddd gfc_conv_variable
        ../../gcc/fortran/trans-expr.c:2737
0x77db02 gfc_conv_expr(gfc_se*, gfc_expr*)
        ../../gcc/fortran/trans-expr.c:7926
0x78a98c gfc_conv_intrinsic_function_args
        ../../gcc/fortran/trans-intrinsic.c:223
0x79dc3d gfc_conv_intrinsic_len_trim
        ../../gcc/fortran/trans-intrinsic.c:6248
0x79dc3d gfc_conv_intrinsic_function(gfc_se*, gfc_expr*)
        ../../gcc/fortran/trans-intrinsic.c:9134
0x77d545 gfc_conv_function_expr
        ../../gcc/fortran/trans-expr.c:6784
0x77dae2 gfc_conv_expr(gfc_se*, gfc_expr*)
        ../../gcc/fortran/trans-expr.c:7918
0x77fa8a gfc_apply_interface_mapping(gfc_interface_mapping*, gfc_se*,
gfc_expr*)
        ../../gcc/fortran/trans-expr.c:4409
0x77b6f7 gfc_conv_procedure_call(gfc_se*, gfc_symbol*, gfc_actual_arglist*,
gfc_expr*, vec<tree_node*, va_gc, vl_embed>*)
        ../../gcc/fortran/trans-expr.c:5970
0x77d59c gfc_conv_function_expr
        ../../gcc/fortran/trans-expr.c:6808
0x77dae2 gfc_conv_expr(gfc_se*, gfc_expr*)
        ../../gcc/fortran/trans-expr.c:7918
0x7843aa gfc_conv_expr_reference(gfc_se*, gfc_expr*)
        ../../gcc/fortran/trans-expr.c:8018
0x7a3d56 gfc_trans_transfer(gfc_code*)
        ../../gcc/fortran/trans-io.c:2585
0x749ec7 trans_code
        ../../gcc/fortran/trans.c:2044
0x7a1807 build_dt
        ../../gcc/fortran/trans-io.c:2027
0x749ee7 trans_code
        ../../gcc/fortran/trans.c:2016