diff -r e4f6dae01b3b -r 6383bb86b700 mercurial/chgserver.py
--- a/mercurial/chgserver.py	Thu Dec 17 18:08:25 2020 +0100
+++ b/mercurial/chgserver.py	Fri Dec 18 13:53:26 2020 +0530
@@ -518,6 +518,8 @@
         except error.Abort as inst:
             if isinstance(inst, error.InputError):
                 detailed_exit_code = 10
+            elif isinstance(inst, error.ConfigError):
+                detailed_exit_code = 30
             self.ui.error(inst.format())
             errorraised = True