gateway_base: fix Gateway.join ignoring timeout

Author: bluetech

CHANGELOG.rst

@@ -14,6 +14,7 @@
 
   Also fixed ``init_popen_io`` to use ``closefd=False`` for shared stdin and stdout file
   descriptors, preventing ``Bad file descriptor`` errors triggered by test_stdouterrin_setnull.
+* Fixed ``GatewayBase.join()`` timeout argument getting ignored.
 * Removed support for Python 3.7.
 * Added official support for Python 3.12.
 

src/execnet/gateway_base.py

@@ -1203,7 +1203,7 @@ def newchannel(self) -> Channel:
     def join(self, timeout: float | None = None) -> None:
         """Wait for receiverthread to terminate."""
         self._trace("waiting for receiver thread to finish")
-        self._receivepool.waitall()
+        self._receivepool.waitall(timeout)
 
 
 class WorkerGateway(BaseGateway):