43 struct C2  struct
48     explicit C2(int id) : B(id-2), id_(id) {count++;}  in C2()  argument
49     C2(const C2& a) : B(a.id_-2), id_(a.id_) {count++;}  in C2()  argument
50     ~C2() {count--;}  in ~C2()  argument
53 int C2::count = 0;
56     : C1, C2
60     explicit A(int id) : C1(id-1), C2(id-2), B(id+3), id_(id) {count++;}  in A()
61     A(const A& a) : C1(a.id_-1), C2(a.id_-2), B(a.id_+3), id_(a.id_) {count++;}  in A()
86         assert(static_cast<const C2*>(a)->id_ == 3);  in f2()
94     catch (const C2*)  in f2()
120     catch (const C2*)  in f3()
133     catch (const C2* c2)  // can catch C2  in f4()
165     catch (const C2*)  in f5()