From 87f86414ee51a6b5308470a57103f45255f80769 Mon Sep 17 00:00:00 2001
From: Ian Hickson <ian@hixie.ch>
Date: Mon, 15 Feb 2016 09:52:27 -0800
Subject: [PATCH] Mention that cache directory is volatile.

---
 bin/cache/README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/bin/cache/README.md b/bin/cache/README.md
index c7f88be9370..ff30fed7bec 100644
--- a/bin/cache/README.md
+++ b/bin/cache/README.md
@@ -1,3 +1,5 @@
 # Binary cache
 
 This directory contains a cache of binary artifacts used by the Flutter tools.
+
+Warning: Flutter tools will sometimes automatically delete files in this directory.