_socket.py: fix for systems where AI_NUMERICSERV is not defined

Credits to @CoolCat467 Closes: python-trio#3133
barracuda156 · Nov 17, 2024 · 5260922 · 5260922
1 parent 6cacb3b
commit 5260922
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/trio/_socket.py b/src/trio/_socket.py
@@ -169,7 +169,9 @@ def set_custom_socket_factory(
 # getaddrinfo and friends
 ################################################################
 
-_NUMERIC_ONLY = _stdlib_socket.AI_NUMERICHOST | _stdlib_socket.AI_NUMERICSERV
+# AI_NUMERICSERV may be missing on some older platforms, so use it when available.
+_NUMERIC_ONLY = _stdlib_socket.AI_NUMERICHOST
+_NUMERIC_ONLY |= getattr(_stdlib_socket, "AI_NUMERICSERV", 0)
 
 
 # It would be possible to @overload the return value depending on Literal[AddressFamily.INET/6], but should probably be added in typeshed first