From b3af3aff731eda516decaa26d33813b944d95679 Mon Sep 17 00:00:00 2001
From: Justin Ethier <justin.ethier@gmail.com>
Date: Thu, 29 Oct 2015 21:53:21 -0400
Subject: [PATCH] Added note

---
 gc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gc.c b/gc.c
index 2dd8f976..1ef1f329 100644
--- a/gc.c
+++ b/gc.c
@@ -544,6 +544,8 @@ void gc_mark_black(object obj)
     // Gray any child objects
     // Note we probably should use some form of atomics/synchronization
     // for cons and vector types, as these pointers could change.
+    // Also this is a case for adding the stack/heap bit, because these could
+    // be stack objects if a thread issued an update.
     switch(type_of(obj)) {
       case cons_tag: {
         gc_collector_mark_gray(car(obj));