Issue #14151: Raise a ValueError, not a NameError, when trying to create

a multiprocessing Client or Listener with an AF_PIPE type address under
non-Windows platforms.  Patch by Popa Claudiu.

Lib/multiprocessing/connection.py

@@ -104,6 +104,13 @@ def arbitrary_address(family):
     else:
         raise ValueError('unrecognized family')
 
+def _validate_family(family):
+    '''
+    Checks if the family is valid for the current environment.
+    '''
+    if sys.platform != 'win32' and family == 'AF_PIPE':
+        raise ValueError('Family %s is not recognized.' % family)
+
 
 def address_type(address):
     '''
@@ -436,6 +443,7 @@ def __init__(self, address=None, family=None, backlog=1, authkey=None):
                  or default_family
         address = address or arbitrary_address(family)
 
+        _validate_family(family)
         if family == 'AF_PIPE':
             self._listener = PipeListener(address, backlog)
         else:
@@ -473,6 +481,7 @@ def Client(address, family=None, authkey=None):
     Returns a connection to the address of a `Listener`
     '''
     family = family or address_type(address)
+    _validate_family(family)
     if family == 'AF_PIPE':
         c = PipeClient(address)
     else:

Lib/test/test_multiprocessing.py

@@ -2638,8 +2638,20 @@ def test_wait_integer(self):
         p.join()
 
 
+#
+# Issue 14151: Test invalid family on invalid environment
+#
+
+class TestInvalidFamily(unittest.TestCase):
+
+    @unittest.skipIf(WIN32, "skipped on Windows")
+    def test_invalid_family(self):
+        with self.assertRaises(ValueError):
+            multiprocessing.connection.Listener(r'\\.\test')
+
+
 testcases_other = [OtherTest, TestInvalidHandle, TestInitializers,
-                   TestStdinBadfiledescriptor, TestWait]
+                   TestStdinBadfiledescriptor, TestWait, TestInvalidFamily]
 
 #
 #

Misc/NEWS

@@ -40,6 +40,10 @@ Core and Builtins
 Library
 -------
 
+- Issue #14151: Raise a ValueError, not a NameError, when trying to create
+  a multiprocessing Client or Listener with an AF_PIPE type address under
+  non-Windows platforms.  Patch by Popa Claudiu.
+
 - Issue #14300: Under Windows, sockets created using socket.dup() now allow
   overlapped I/O.  Patch by sbt.