Slightly improve the error message when a stats.pickle file cannot be read.

diff --git a/src/allmydata/stats.py b/src/allmydata/stats.py
index ea0a7f85d850dacd74584ecdfa3dd2e5e08d8155..7db323ba5ce68b2fe30101cb0dc47c1fc0188add 100644 (file)
--- a/src/allmydata/stats.py
+++ b/src/allmydata/stats.py
@@ -256,7 +256,8 @@ class PickleStatsGatherer(StdOutStatsGatherer):
             try:
                 self.gathered_stats = pickle.load(f)
             except Exception:
-                print ("Error while attempting to load pickle file %s.\nYou may need to delete this file.\n" %
+                print ("Error while attempting to load pickle file %s.\n"
+                       "You may need to restore this file from a backup, or delete it if no backup is available.\n" %
                        quote_output(os.path.abspath(self.picklefile)))
                 raise
             f.close()