--- a/src/hotspot/share/memory/allocation.hpp	Wed Sep 11 14:16:27 2019 +0200
+++ b/src/hotspot/share/memory/allocation.hpp	Wed Sep 11 14:16:30 2019 +0200
@@ -184,6 +184,7 @@
                      MEMFLAGS flag,
                      AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM);
 
+// handles NULL pointers
 void FreeHeap(void* p);
 
 template <MEMFLAGS F> class CHeapObj ALLOCATION_SUPER_CLASS_SPEC {