1 /* 2 TEST_OUTPUT: 3 --- 4 fail_compilation/fail15626.d(12): Error: class fail15626.D C++ base class C needs at least one virtual function 5 --- 6 */ 7 8 extern (C++) 9 { 10 class C { } 11 interface I { void f(); } 12 class D : C, I 13 { f()14 void f() { } 15 } 16 } 17