https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71196

            Bug ID: 71196
           Summary: f951: internal compiler error: in
                    gfc_conv_string_init, at fortran/trans-const.c:149
           Product: gcc
           Version: 6.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: georg.bugzilla at gmx dot at
  Target Milestone: ---

Created attachment 38525
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38525&action=edit
minimal self contained sourcce for reproduction of the ICE

gfortran -v
------------------------------------
Using built-in specs.
COLLECT_GCC=/tmp/gcc-6/bin/gfortran
COLLECT_LTO_WRAPPER=/tmp/gcc-6/libexec/gcc/x86_64-pc-linux-gnu/6.1.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-6.1.0/configure --prefix=/tmp/gcc-6/
--enable-languages=c,c++,fortran
Thread model: posix
gcc version 6.1.0 (GCC)
------------------------------------

gfortran -Wall -Wextra -c ice.f90

with ice.f90 (attached)
------------------------------------
module ice

type substructure_
   integer :: id
   character(16) :: value
end type substructure_

type structure_
   type(substructure_) :: element
end type structure_

type(structure_) :: structure

DATA structure%element%id / 1 /
DATA structure%element%value / "test" /

end module ice
------------------------------------

results in 
------------------------------------
f951: internal compiler error: in gfc_conv_string_init, at
fortran/trans-const.c:149
0x6cfaba gfc_conv_string_init(tree_node*, gfc_expr*)
        ../../gcc-6.1.0/gcc/fortran/trans-const.c:149
0x6ecaff gfc_conv_initializer(gfc_expr*, gfc_typespec*, tree_node*, bool, bool,
bool)
        ../../gcc-6.1.0/gcc/fortran/trans-expr.c:6731
0x6ecd8b gfc_conv_structure(gfc_se*, gfc_expr*, int)
        ../../gcc-6.1.0/gcc/fortran/trans-expr.c:7458
0x6ecb4a gfc_conv_initializer(gfc_expr*, gfc_typespec*, tree_node*, bool, bool,
bool)
        ../../gcc-6.1.0/gcc/fortran/trans-expr.c:6724
0x6ecd8b gfc_conv_structure(gfc_se*, gfc_expr*, int)
        ../../gcc-6.1.0/gcc/fortran/trans-expr.c:7458
0x6ecb4a gfc_conv_initializer(gfc_expr*, gfc_typespec*, tree_node*, bool, bool,
bool)
        ../../gcc-6.1.0/gcc/fortran/trans-expr.c:6724
0x6d80ec gfc_get_symbol_decl(gfc_symbol*)
        ../../gcc-6.1.0/gcc/fortran/trans-decl.c:1689
0x6da253 gfc_create_module_variable
        ../../gcc-6.1.0/gcc/fortran/trans-decl.c:4667
0x6a345b do_traverse_symtree
        ../../gcc-6.1.0/gcc/fortran/symbol.c:3817
0x6dcc7b gfc_generate_module_vars(gfc_namespace*)
        ../../gcc-6.1.0/gcc/fortran/trans-decl.c:5110
0x6bb44b gfc_generate_module_code(gfc_namespace*)
        ../../gcc-6.1.0/gcc/fortran/trans.c:2032
0x6741dd translate_all_program_units
        ../../gcc-6.1.0/gcc/fortran/parse.c:5600
0x6741dd gfc_parse_file()
        ../../gcc-6.1.0/gcc/fortran/parse.c:5819
0x6b5365 gfc_be_parse_file
        ../../gcc-6.1.0/gcc/fortran/f95-lang.c:201
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
------------------------------------

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