ignore_fields.cpp:9:1: warning: [blink-gc] Class 'C' has untraced fields that require tracing.
void C::Trace(Visitor* visitor) const {
^
./ignore_fields.h:37:5: note: [blink-gc] Untraced field 'm_one' declared here:
Member<HeapObject> m_one;
^
1 warning generated.