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-rw-r--r--Lib/ipaddress.py4
1 files changed, 2 insertions, 2 deletions
diff --git a/Lib/ipaddress.py b/Lib/ipaddress.py
index 1f90058..20f33cb 100644
--- a/Lib/ipaddress.py
+++ b/Lib/ipaddress.py
@@ -636,12 +636,12 @@ class _BaseNetwork(_IPAddressBase):
broadcast = int(self.broadcast_address)
if n >= 0:
if network + n > broadcast:
- raise IndexError
+ raise IndexError('address out of range')
return self._address_class(network + n)
else:
n += 1
if broadcast + n < network:
- raise IndexError
+ raise IndexError('address out of range')
return self._address_class(broadcast + n)
def __lt__(self, other):