[Bug libstdc++/51452] has_nothrow_.*constructor bugs

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51452

--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-12-09 
16:02:11 UTC ---
Corrected testcase:

  struct X
  {
      X() noexcept;
      ~X() noexcept(false);
  };

  static_assert( noexcept( X() ), "fails because of ~X" );
  static_assert( noexcept(new (nullptr) X()), "works" );