[Bug fortran/88486] New: ICE in gfc_conv_scalarized_array_ref, at fortran/trans-array.c:3401

[gscfq@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88486

            Bug ID: 88486
           Summary: ICE in gfc_conv_scalarized_array_ref, at
                    fortran/trans-array.c:3401
           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: ---

Affects versions down to at least gfortran-5.
Under the hood related to pr85686.


$ cat z1.f90
subroutine s(x)
   character(:), allocatable :: x(:)
   x = ['bcd']
   x = ['a'//x//'e']
   print *, x
end


$ gfortran-9-20181209 -c z1.f90
z1.f90:4:0:

    4 |    x = ['a'//x//'e']
      |
internal compiler error: Segmentation fault
0xb2f31f crash_signal
        ../../gcc/toplev.c:326
0x6caa5d gfc_conv_scalarized_array_ref
        ../../gcc/fortran/trans-array.c:3401
0x6cb82c gfc_conv_array_ref(gfc_se*, gfc_array_ref*, gfc_expr*, locus*)
        ../../gcc/fortran/trans-array.c:3554
0x6f468e gfc_conv_variable
        ../../gcc/fortran/trans-expr.c:2773
0x6f130a gfc_conv_expr(gfc_se*, gfc_expr*)
        ../../gcc/fortran/trans-expr.c:8047
0x6f5039 gfc_conv_string_length(gfc_charlen*, gfc_expr*, stmtblock_t*)
        ../../gcc/fortran/trans-expr.c:2243
0x6c69f6 get_array_charlen
        ../../gcc/fortran/trans-array.c:6979
0x6c6b07 get_array_charlen
        ../../gcc/fortran/trans-array.c:6922
0x6c698e get_array_charlen
        ../../gcc/fortran/trans-array.c:6911
0x6d400c gfc_conv_expr_descriptor(gfc_se*, gfc_expr*)
        ../../gcc/fortran/trans-array.c:7296
0x6d480e get_array_ctor_all_strlen
        ../../gcc/fortran/trans-array.c:2025
0x6d4916 get_array_ctor_strlen(stmtblock_t*, splay_tree_s*, tree_node**)
        ../../gcc/fortran/trans-array.c:2142
0x6d25e7 trans_array_constructor
        ../../gcc/fortran/trans-array.c:2473
0x6d25e7 gfc_add_loop_ss_code
        ../../gcc/fortran/trans-array.c:2835
0x6d2e65 gfc_conv_loop_setup(gfc_loopinfo*, locus*)
        ../../gcc/fortran/trans-array.c:5129
0x6ff8db gfc_trans_assignment_1
        ../../gcc/fortran/trans-expr.c:10208
0x6c278f trans_code
        ../../gcc/fortran/trans.c:1822
0x73084f gfc_trans_block_construct(gfc_code*)
        ../../gcc/fortran/trans-stmt.c:2066
0x6c2937 trans_code
        ../../gcc/fortran/trans.c:1918
0x6ea054 gfc_generate_function_code(gfc_namespace*)
        ../../gcc/fortran/trans-decl.c:6509