py3: catch ProcessLookupError instead of checking errno == ESRCH

mercurial/worker.py

@@ -6,7 +6,6 b''
 # GNU General Public License version 2 or any later version.
 
 
-import errno
 import os
 import pickle
 import selectors
@@ -177,9 +176,8 b' def _posixworker(ui, func, staticargs, a'
         for p in pids:
             try:
                 os.kill(p, signal.SIGTERM)
-            except OSError as err:
-                if err.errno != errno.ESRCH:
-                    raise
+            except ProcessLookupError:
+                pass
 
     def waitforworkers(blocking=True):
         for pid in pids.copy():

tests/killdaemons.py

@@ -1,6 +1,5 b''
 #!/usr/bin/env python3
 
-import errno
 import os
 import signal
 import sys
@@ -93,9 +92,8 b' else:'
                 os.kill(pid, 0)
             logfn('# Daemon process %d is stuck - really killing it' % pid)
             os.kill(pid, signal.SIGKILL)
-        except OSError as err:
-            if err.errno != errno.ESRCH:
-                raise
+        except ProcessLookupError:
+            pass
 
 
 def killdaemons(pidfile, tryhard=True, remove=False, logfn=None):