- Remember objects (not addresses) in the old generation containing new pointers.

runtime/vm/object.h

Index: runtime/vm/object.h
===================================================================
--- runtime/vm/object.h	(revision 20732)
+++ runtime/vm/object.h	(working copy)
@@ -432,7 +432,7 @@
     // Filter stores based on source and target.
     if (!value->IsHeapObject()) return;
     if (value->IsNewObject() && raw()->IsOldObject()) {
-      uword ptr = reinterpret_cast<uword>(addr);
+      uword ptr = reinterpret_cast<uword>(raw());
       Isolate::Current()->store_buffer()->AddPointer(ptr);
     }
   }
@@ -4930,7 +4930,7 @@
     // Filter stores based on source and target.
     if (!value->IsHeapObject()) return;
     if (value->IsNewObject() && data()->IsOldObject()) {
-      uword ptr = reinterpret_cast<uword>(addr);
+      uword ptr = reinterpret_cast<uword>(data());
       Isolate::Current()->store_buffer()->AddPointer(ptr);
     }
   }