[Bug c++/79176] [6/7 Regression] ICE in mangle_decl with LTO and Os

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79176

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |lto
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-01-22
                 CC|                            |hubicka at gcc dot gnu.org,
                   |                            |trippels at gcc dot gnu.org
            Summary|ICE in mangle_decl with LTO |[6/7 Regression] ICE in
                   |and Os                      |mangle_decl with LTO and Os
     Ever confirmed|0                           |1

--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Assert was added in r223633.

markus@x4 tmp % cat tileui.ii
struct A {};
struct Object {
  virtual bool m_fn1();
  virtual ~Object();
};
struct Item : Object, virtual A {
  ~Item() {
    [] {};
  }
  bool m_fn1();
};
bool Item::m_fn1() {}

markus@x4 tmp % g++ tileui.ii -flto -Os -r -nostdlib
tileui.ii:8:6: internal compiler error: in mangle_decl, at cp/mangle.c:3845
     [] {};
      ^
0x8060e2 mangle_decl(tree_node*)
        /home/markus/gcc/gcc/cp/mangle.c:3844
0x1030c26 decl_assembler_name(tree_node*)
        /home/markus/gcc/gcc/tree.c:671
0x10571ee assign_assembler_name_if_neeeded(tree_node*)
        /home/markus/gcc/gcc/tree.c:5923
0x10596b9 free_lang_data_in_cgraph
        /home/markus/gcc/gcc/tree.c:5972
0x10596b9 free_lang_data
        /home/markus/gcc/gcc/tree.c:6009
0x10596b9 execute
        /home/markus/gcc/gcc/tree.c:6058
Please submit a full bug repor