/*
TEST_OUTPUT:
---
-fail_compilation/diag5450.d(18): Error: class diag5450.C cannot implicitly generate a default ctor when base class diag5450.B is missing a default ctor
+fail_compilation/diag5450.d(18): Error: class `diag5450.C` cannot implicitly generate a default constructor when base class `diag5450.B` is missing a default constructor
---
*/