From ea7fac99e65037699eefe97b714808f7c73bf147 Mon Sep 17 00:00:00 2001
From: Brandon Carter <bcarter@mit.edu>
Date: Sat, 24 Jun 2017 23:13:38 -0400
Subject: BUG: fixes unsigned bins monotonicity check, see #9222

---
 numpy/lib/function_base.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'numpy/lib/function_base.py')

diff --git a/numpy/lib/function_base.py b/numpy/lib/function_base.py
index a3db3494c..8bde521bf 100644
--- a/numpy/lib/function_base.py
+++ b/numpy/lib/function_base.py
@@ -782,7 +782,7 @@ def histogram(a, bins=10, range=None, normed=False, weights=None,
         bins = bin_edges
     else:
         bins = asarray(bins)
-        if (np.diff(bins) < 0).any():
+        if not np.all(bins[1:] > bins[:-1]):
             raise ValueError(
                 'bins must increase monotonically.')
 
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