40 struct C1  struct
45     explicit C1(int id) : B(id-2), id_(id) {count++;}  in C1()  argument
46     C1(const C1& a) : B(a.id_-2), id_(a.id_) {count++;}  in C1()  argument
47     ~C1() {count--;}  in ~C1()  argument
50 int C1::count = 0;
65     : C1, C2
69     explicit A(int id) : B(id+3), C1(id-1), C2(id-2), id_(id) {count++;}  in A()
70     A(const A& a) :  B(a.id_+3), C1(a.id_-1), C2(a.id_-2), id_(a.id_) {count++;}  in A()
79     assert(C1::count == 0);  in f1()
84     assert(C1::count == 1);  in f1()
89     assert(static_cast<C1&>(a).id_ == 4);  in f1()
101         assert(C1::count == 0);  in f2()
110         assert(static_cast<const C1&>(a).id_ == 4);  in f2()
115     catch (const C1&)  in f2()
134         assert(C1::count == 0);  in f3()
145     catch (const C1& c1)  in f3()
160         assert(C1::count == 0);  in f4()
175     catch (const C1&)  in f4()
186         assert(C1::count == 0);  in f5()
192     catch (const C1& c1)  // can catch C1  in f5()
219     assert(C1::count == 0);  in main()