From edaa784d3de1f35fc6bc7de31302858a1e7b78c5 Mon Sep 17 00:00:00 2001
From: Kazuhiro Serizawa <nserihiro@gmail.com>
Date: Wed, 6 Jun 2018 07:20:36 +0900
Subject: [PATCH] Avoid memoizing network-related false negatives of
 GCECredentials.on_gce? (#137)

---
 lib/googleauth/application_default.rb | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/googleauth/application_default.rb b/lib/googleauth/application_default.rb
index ec8b909..82a8895 100644
--- a/lib/googleauth/application_default.rb
+++ b/lib/googleauth/application_default.rb
@@ -58,7 +58,11 @@ ERROR_MESSAGE
               DefaultCredentials.from_well_known_path(scope) ||
               DefaultCredentials.from_system_default_path(scope)
       return creds unless creds.nil?
-      raise NOT_FOUND_ERROR unless GCECredentials.on_gce?(options)
+      unless GCECredentials.on_gce?(options)
+        # Clear cache of the result of GCECredentials.on_gce?
+        GCECredentials.unmemoize_all
+        raise NOT_FOUND_ERROR
+      end
       GCECredentials.new
     end