From d038300f462f423dd248dc45abc58503e5fa89f4 Mon Sep 17 00:00:00 2001
From: Justin Ethier <justin.ethier@gmail.com>
Date: Tue, 10 Jan 2017 02:44:36 -0500
Subject: [PATCH] Clarify mutator behavior on async transition

---
 docs/Garbage-Collector.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/Garbage-Collector.md b/docs/Garbage-Collector.md
index 81ff0273..ce760db4 100644
--- a/docs/Garbage-Collector.md
+++ b/docs/Garbage-Collector.md
@@ -168,7 +168,7 @@ The collector swaps the values of the clear color (white) and the mark color (bl
 <img src="images/gc-graph-clear.png" alt="Initial object graph">
 
 ### Mark
-The collector transitions to sync 2 and then async. At this point it marks the global variables and waits for the mutators to also transition to async:
+The collector transitions to sync 2 and then async. At this point it marks the global variables and waits for the mutators to also transition to async. When a mutator transitions it will gray its roots and use black as the allocation color to prevent any new objects from being collected during this cycle:
 
 <img src="images/gc-graph-mark.png" alt="Initial object graph">