[Bug sanitizer/70147] testcase from hana testsuite gets miscompiled with -fsanitize=undefined

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70147

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2016-03-11
           Assignee|unassigned at gcc dot gnu.org      |jakub at gcc dot gnu.org
   Target Milestone|---                         |6.0
     Ever confirmed|0                           |1

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Smaller testcase:
struct A
{
  A () {}
  virtual void f() {}
};
struct B : virtual A
{
  B () {}
  virtual void f() {}
};
struct C : B, virtual A
{
  C () {}
} c;
int
main ()
{
}