[Bug middle-end/66214] New: [6 Regression] ICE verify_type failed with -O0 -g via gen_type_die_with_usage's dwarf2out.c:20250

["burnus at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66214

            Bug ID: 66214
           Summary: [6 Regression] ICE verify_type failed with -O0 -g via
                    gen_type_die_with_usage's dwarf2out.c:20250
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: burnus at gcc dot gnu.org
                CC: hubicka at gcc dot gnu.org
  Target Milestone: ---

Created attachment 35574
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35574&action=edit
Test case (input13.ii): Compile with g++ -std=c++11 -g

The bug reminds me of 66103, but is one is without LTO.

Compiling the attached code snipped with "g++ -std=c++11 -g" give the following
ICE. Without "-g", it doesn't crash:


input13.ii:53:34:   required from here
input13.ii:44:74: error: TYPE_CANONICAL is not compatible
 template < typename _Tp, typename _Alloc = std::allocator < _Tp > >class
vector:protected _Vector_base < _Tp,
[...]
input13.ii:44:74: internal compiler error: verify_type failed
0xf3e280 verify_type(tree_node const*)
        ../../gcc/tree.c:13257
0x96dc04 gen_type_die_with_usage
        ../../gcc/dwarf2out.c:20250
0x96e2a3 gen_type_die_with_usage
        ../../gcc/dwarf2out.c:20337
0x97f21c gen_type_die
        ../../gcc/dwarf2out.c:20434
0x97f21c gen_formal_types_die
        ../../gcc/dwarf2out.c:18027