|  | trace_after_dispatch.cpp:11:1: warning: [blink-gc] Missing dispatch to class 'D' in manual trace dispatch. | 
|  | void A::trace(Visitor* visitor) | 
|  | ^ | 
|  | trace_after_dispatch.cpp:30:1: warning: [blink-gc] Base class 'A' of derived class 'B' requires tracing. | 
|  | void B::traceAfterDispatch(Visitor* visitor) | 
|  | ^ | 
|  | trace_after_dispatch.cpp:38:1: warning: [blink-gc] Class 'C' has untraced fields that require tracing. | 
|  | void C::traceAfterDispatch(Visitor* visitor) | 
|  | ^ | 
|  | ./trace_after_dispatch.h:36:5: note: [blink-gc] Untraced field 'm_a' declared here: | 
|  | Member<A> m_a; | 
|  | ^ | 
|  | 3 warnings generated. |