diff -r 7a8ea1397816 -r d718eddf01d9 mercurial/chgserver.py
--- a/mercurial/chgserver.py	Thu Dec 08 15:33:19 2022 +0100
+++ b/mercurial/chgserver.py	Thu Aug 31 23:56:15 2023 +0200
@@ -236,7 +236,7 @@
             # will behave differently (i.e. write to stdout).
             if (
                 out is not self.fout
-                or not util.safehasattr(self.fout, 'fileno')
+                or not hasattr(self.fout, 'fileno')
                 or self.fout.fileno() != procutil.stdout.fileno()
                 or self._finoutredirected
             ):
@@ -262,7 +262,7 @@
     newui = srcui.__class__.load()
     for a in ['fin', 'fout', 'ferr', 'environ']:
         setattr(newui, a, getattr(srcui, a))
-    if util.safehasattr(srcui, '_csystem'):
+    if hasattr(srcui, '_csystem'):
         newui._csystem = srcui._csystem
 
     # command line args
@@ -603,7 +603,7 @@
         }
     )
 
-    if util.safehasattr(procutil, 'setprocname'):
+    if hasattr(procutil, 'setprocname'):
 
         def setprocname(self):
             """Change process title"""