chromium/tools/clang/blink_gc_plugin/tests/cycle_super.txt

Found a potentially leaking cycle starting from a GC root:
./cycle_super.h:37:5: blink::D (m_c) => blink::C
./cycle_super.h:22:3: blink::C (blink::B <: blink::A <: m_d) => blink::D