From dd9051c78476be2bc2cbf03ab895e8dde5ca14ca Mon Sep 17 00:00:00 2001
From: Warren Weckesser <warren.weckesser@gmail.com>
Date: Sun, 18 Aug 2019 12:07:55 -0400
Subject: BUG: core: Handle large negative np.int64 args in binary_repr.

To avoid the cast to floating point that can occur when the first
argument to binary_repr is a NumPy integer, the argument is converted
to a Python integer at the beginning of the function.

Closes gh-14289.
---
 numpy/core/numeric.py | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'numpy/core/numeric.py')

diff --git a/numpy/core/numeric.py b/numpy/core/numeric.py
index ff8c58867..bbcd58abb 100644
--- a/numpy/core/numeric.py
+++ b/numpy/core/numeric.py
@@ -1935,6 +1935,10 @@ def binary_repr(num, width=None):
                 "will raise an error in the future.", DeprecationWarning,
                 stacklevel=3)
 
+    # Ensure that num is a Python integer to avoid overflow or unwanted
+    # casts to floating point.
+    num = operator.index(num)
+
     if num == 0:
         return '0' * (width or 1)
 
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