In file included from traceimpl_overloaded_error.cpp:5:
./traceimpl_overloaded_error.h:19:3: warning: [blink-gc] Class 'InlinedBase' has untraced fields that require tracing.
  virtual void Trace(Visitor* visitor) const {
  ^
./traceimpl_overloaded_error.h:24:3: note: [blink-gc] Untraced field 'x_base_' declared here:
  Member<X> x_base_;
  ^
./traceimpl_overloaded_error.h:29:3: warning: [blink-gc] Base class 'InlinedBase' of derived class 'InlinedDerived' requires tracing.
  void Trace(Visitor* visitor) const override {
  ^
./traceimpl_overloaded_error.h:29:3: warning: [blink-gc] Class 'InlinedDerived' has untraced fields that require tracing.
./traceimpl_overloaded_error.h:34:3: note: [blink-gc] Untraced field 'x_derived_' declared here:
  Member<X> x_derived_;
  ^
traceimpl_overloaded_error.cpp:9:1: warning: [blink-gc] Class 'ExternBase' has untraced fields that require tracing.
void ExternBase::Trace(Visitor* visitor) const {
^
./traceimpl_overloaded_error.h:42:3: note: [blink-gc] Untraced field 'x_base_' declared here:
  Member<X> x_base_;
  ^
traceimpl_overloaded_error.cpp:13:1: warning: [blink-gc] Base class 'ExternBase' of derived class 'ExternDerived' requires tracing.
void ExternDerived::Trace(Visitor* visitor) const {
^
traceimpl_overloaded_error.cpp:13:1: warning: [blink-gc] Class 'ExternDerived' has untraced fields that require tracing.
./traceimpl_overloaded_error.h:50:3: note: [blink-gc] Untraced field 'x_derived_' declared here:
  Member<X> x_derived_;
  ^
6 warnings generated.