[Bug c++/66536] New: [5/6 Regression] ICE in build_ctor_subob_ref, at cp/tree.c:2534

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66536

            Bug ID: 66536
           Summary: [5/6 Regression] ICE in build_ctor_subob_ref, at
                    cp/tree.c:2534
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: trippels at gcc dot gnu.org
  Target Milestone: ---

trippels@gcc2-power8 test % cat array.ii
template <typename> struct make_impl;
struct Tuple;
template <> struct make_impl<Tuple> {};
struct A {
  template <typename X> auto operator()(X) { return make_impl<Tuple>(); }
};
template <typename> A make;
template <typename _Tp, int> struct array { _Tp _M_elems; };
struct Tracked {
  Tracked(int);
};
struct B {
  Tracked tracker{0};
};
template <int> using ct_eq = B;
auto eq_arrays = make<Tuple>(array<ct_eq<0>, 0>{});

trippels@gcc2-power8 test % clang++ -c -std=c++14 array.ii
trippels@gcc2-power8 test % c++ -c -std=c++14 array.ii
array.ii:16:50: internal compiler error: in build_ctor_subob_ref, at
cp/tree.c:2534
 auto eq_arrays = make<Tuple>(array<ct_eq<0>, 0>{});
                                                  ^
0x1039446b build_ctor_subob_ref(tree_node*, tree_node*, tree_node*)
        ../../gcc/gcc/cp/tree.c:2533
0x10394703 replace_placeholders_r
        ../../gcc/gcc/cp/tree.c:2579
0x10dbc523 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hashset_traits>*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hashset_traits>*))
        ../../gcc/gcc/tree.c:11176
0x10dbcd63 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hashset_traits>*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hashset_traits>*))
        ../../gcc/gcc/tree.c:11390
0x1039490b replace_placeholders(tree_node*, tree_node*)
        ../../gcc/gcc/cp/tree.c:2604
0x1024bb23 store_init_value(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
        ../../gcc/gcc/cp/typeck2.c:841
0x10197bc7 check_initializer
        ../../gcc/gcc/cp/decl.c:6010
0x101c77cf cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
        ../../gcc/gcc/cp/decl.c:6622
0x102f7de3 cp_parser_init_declarator
        ../../gcc/gcc/cp/parser.c:17316
0x102fad43 cp_parser_simple_declaration
        ../../gcc/gcc/cp/parser.c:11608
0x102f26e7 cp_parser_block_declaration
        ../../gcc/gcc/cp/parser.c:11482
0x102ffc8f cp_parser_declaration
        ../../gcc/gcc/cp/parser.c:11379
0x102fdc2f cp_parser_declaration_seq_opt
        ../../gcc/gcc/cp/parser.c:11265
0x102fe013 cp_parser_translation_unit
        ../../gcc/gcc/cp/parser.c:4100
0x102fe013 c_parse_file()
        ../../gcc/gcc/cp/parser.c:33241
0x10493d6b c_common_parse_file()
        ../../gcc/gcc/c-family/c-opts.c:1061
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