[Bug fortran/82969] New: ICE in gfc_class_vptr_get, at fortran/trans-expr.c:211

[gscfq@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82969

            Bug ID: 82969
           Summary: ICE in gfc_class_vptr_get, at fortran/trans-expr.c:211
           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: ---

This variant does not compile with snapshot from 20171112 :


$ cat z1.f90
module m
   type t
      real, allocatable :: x(:)
      procedure(f), nopass, pointer :: g
   end type
contains
   function f() result(z)
      class(t), allocatable :: z
   end
end


$ gfortran-8-20171112 -c z1.f90
z1.f90:10:0:

 end

internal compiler error: Segmentation fault
0xb61c7f crash_signal
        ../../gcc/toplev.c:325
0x75c0de gfc_class_vptr_get(tree_node*)
        ../../gcc/fortran/trans-expr.c:211
0x75c6c8 class_vtab_field_get
        ../../gcc/fortran/trans-expr.c:280
0x75c6c8 gfc_class_vtab_size_get(tree_node*)
        ../../gcc/fortran/trans-expr.c:314
0x741de8 structure_alloc_comps
        ../../gcc/fortran/trans-array.c:8836
0x75ef9a gfc_trans_scalar_assign(gfc_se*, gfc_se*, gfc_typespec, bool, bool,
bool)
        ../../gcc/fortran/trans-expr.c:8848
0x76d301 gfc_trans_assignment_1
        ../../gcc/fortran/trans-expr.c:10143
0x731de5 trans_code
        ../../gcc/fortran/trans.c:1843
0x75897c gfc_generate_function_code(gfc_namespace*)
        ../../gcc/fortran/trans-decl.c:6421
0x735841 gfc_generate_module_code(gfc_namespace*)
        ../../gcc/fortran/trans.c:2206
0x6ea84d translate_all_program_units
        ../../gcc/fortran/parse.c:6078
0x6ea84d gfc_parse_file()
        ../../gcc/fortran/parse.c:6294
0x72f13f gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:204


---

While configured with --enable-checking=yes :

$ gfortran-8-20171112-chk -c z1.f90
z1.f90:10:0:

 end

internal compiler error: tree check: expected record_type or union_type or
qual_union_type, have function_type in gfc_class_data_get, at
fortran/trans-expr.c:188
0x610875 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
        ../../gcc/tree.c:9098
0x79578b tree_check3(tree_node*, char const*, int, char const*, tree_code,
tree_code, tree_code)
        ../../gcc/tree.h:3128
0x79578b gfc_class_data_get(tree_node*)
        ../../gcc/fortran/trans-expr.c:188
0x773896 structure_alloc_comps
        ../../gcc/fortran/trans-array.c:8834
0x799c4a gfc_trans_scalar_assign(gfc_se*, gfc_se*, gfc_typespec, bool, bool,
bool)
        ../../gcc/fortran/trans-expr.c:8848
0x7ab3a9 gfc_trans_assignment_1
        ../../gcc/fortran/trans-expr.c:10143
0x75e3f5 trans_code
        ../../gcc/fortran/trans.c:1843
0x7913e8 gfc_generate_function_code(gfc_namespace*)
        ../../gcc/fortran/trans-decl.c:6421
0x763399 gfc_generate_module_code(gfc_namespace*)
        ../../gcc/fortran/trans.c:2206
0x715ced translate_all_program_units
        ../../gcc/fortran/parse.c:6078
0x715ced gfc_parse_file()
        ../../gcc/fortran/parse.c:6294
0x75b20f gfc_be_parse_file
        ../../gcc/fortran/f95-lang.c:204