From d8ecd454698a702bc707834f48d959ffecd54611 Mon Sep 17 00:00:00 2001
From: Kevin Schaaf <kschaaf@google.com>
Date: Mon, 30 Nov 2015 15:06:27 -0800
Subject: [PATCH] Add comment.

---
 src/lib/dom-api-flush.html | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/lib/dom-api-flush.html b/src/lib/dom-api-flush.html
index 618bdd722c..a198311f7c 100644
--- a/src/lib/dom-api-flush.html
+++ b/src/lib/dom-api-flush.html
@@ -31,6 +31,8 @@
       this._flushGuard = 0;
       this._prepareFlush();
       while (this._debouncers.length && this._flushGuard < this._FLUSH_MAX) {
+        // Avoid using an index in this loop to ensure flush is safe to be
+        // called reentrantly from a debouncer callback being flushed
         while (this._debouncers.length) {
           this._debouncers.shift().complete();
         }