Merge pull request #82 from jepler/fix-failed-accept

Preserve the real error if accept failed.

Author: dhalbert

adafruit_httpserver/server.py

@@ -399,6 +399,7 @@ def poll(self) -> str:
         if self.stopped:
             raise ServerStoppedError
 
+        conn = None
         try:
             conn, client_address = self._sock.accept()
             conn.settimeout(self._timeout)
@@ -444,7 +445,8 @@ def poll(self) -> str:
             if self.debug:
                 _debug_exception_in_handler(error)
 
-            conn.close()
+            if conn is not None:
+                conn.close()
             raise error  # Raise the exception again to be handled by the user.
 
     def require_authentication(self, auths: List[Union[Basic, Token, Bearer]]) -> None: