update

.CondaPkg/env/Lib/selectors.py

@@ -509,6 +509,7 @@ if hasattr(select, 'kqueue'):
         def __init__(self):
             super().__init__()
             self._selector = select.kqueue()
+            self._max_events = 0
 
         def fileno(self):
             return self._selector.fileno()
@@ -520,10 +521,12 @@ if hasattr(select, 'kqueue'):
                     kev = select.kevent(key.fd, select.KQ_FILTER_READ,
                                         select.KQ_EV_ADD)
                     self._selector.control([kev], 0, 0)
+                    self._max_events += 1
                 if events & EVENT_WRITE:
                     kev = select.kevent(key.fd, select.KQ_FILTER_WRITE,
                                         select.KQ_EV_ADD)
                     self._selector.control([kev], 0, 0)
+                    self._max_events += 1
             except:
                 super().unregister(fileobj)
                 raise
@@ -534,6 +537,7 @@ if hasattr(select, 'kqueue'):
             if key.events & EVENT_READ:
                 kev = select.kevent(key.fd, select.KQ_FILTER_READ,
                                     select.KQ_EV_DELETE)
+                self._max_events -= 1
                 try:
                     self._selector.control([kev], 0, 0)
                 except OSError:
@@ -543,6 +547,7 @@ if hasattr(select, 'kqueue'):
             if key.events & EVENT_WRITE:
                 kev = select.kevent(key.fd, select.KQ_FILTER_WRITE,
                                     select.KQ_EV_DELETE)
+                self._max_events -= 1
                 try:
                     self._selector.control([kev], 0, 0)
                 except OSError:
@@ -555,7 +560,7 @@ if hasattr(select, 'kqueue'):
             # If max_ev is 0, kqueue will ignore the timeout. For consistent
             # behavior with the other selector classes, we prevent that here
             # (using max). See https://bugs.python.org/issue29255
-            max_ev = max(len(self._fd_to_key), 1)
+            max_ev = self._max_events or 1
             ready = []
             try:
                 kev_list = self._selector.control(None, max_ev, timeout)