rate_bug.patch

diff --git a/gnocchi/tests/test_carbonara.py b/gnocchi/tests/test_carbonara.py
index 51cbfc22..3b2c4743 100644
--- a/gnocchi/tests/test_carbonara.py
+++ b/gnocchi/tests/test_carbonara.py
@@ -276,6 +276,46 @@ class TestAggregatedTimeSerie(base.BaseTestCase):
         self.assertEqual(5.9000000000000004,
                          ts[datetime64(2014, 1, 1, 12, 0, 0)][1])

+    def test_mean_bug_percentile(self):
+        for i in range(0, 1000000):
+            print("# %d #" % i)
+            self._do_test_mean_bug_percentile()
+
+    def _do_test_mean_bug_percentile(self):
+        ts = carbonara.TimeSerie.from_tuples([
+          (datetime64(2015, 3, 6, 14, 33, 0), 10),
+          (datetime64(2015, 3, 6, 14, 34, 10), 13),
+          (datetime64(2015, 3, 6, 14, 34, 20), 13),
+          (datetime64(2015, 3, 6, 14, 34, 30), 15),
+          (datetime64(2015, 3, 6, 14, 34, 40), 18),
+          (datetime64(2015, 3, 6, 14, 34, 50), 20),
+          (datetime64(2015, 3, 6, 14, 35, 0), 22),
+          (datetime64(2015, 3, 6, 14, 35, 10), 26),
+          (datetime64(2015, 3, 6, 14, 35, 20), 30),
+          (datetime64(2015, 3, 6, 14, 35, 30), 31),
+          (datetime64(2015, 3, 6, 14, 35, 40), 37),
+          (datetime64(2015, 3, 6, 14, 35, 50), 55),
+          (datetime64(2015, 3, 6, 14, 36, 0), 62),
+          (datetime64(2015, 3, 6, 14, 36, 10), 100),
+          (datetime64(2015, 3, 6, 14, 36, 20), 102),
+          (datetime64(2015, 3, 6, 14, 36, 30), 103),
+          (datetime64(2015, 3, 6, 14, 36, 40), 104),
+          (datetime64(2015, 3, 6, 14, 36, 50), 110),
+        ])
+
+        ts = self._resample(ts, numpy.timedelta64(60, 's'),
+                            'mean', derived=True)
+
+        self.assertEqual(3, len(ts))
+        self.assertEqual(
+            [(datetime64(2015, 3, 6, 14, 34, 0), numpy.timedelta64(60, 's'),
+              2),
+             (datetime64(2015, 3, 6, 14, 35, 0), numpy.timedelta64(60, 's'),
+              5.833333333333333),
+             (datetime64(2015, 3, 6, 14, 36, 0), numpy.timedelta64(60, 's'),
+              9.166666666666666)],
+            list(ts.fetch()))
+
     def test_transform(self):
         ts = carbonara.TimeSerie.from_tuples(
             [(datetime64(2014, 1, 1, 12, 0, 0), -3),
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