diff -r 16b48ebf656e -r 33c0c25d0b0f mercurial/chgserver.py
--- a/mercurial/chgserver.py	Wed May 19 15:10:49 2021 +0200
+++ b/mercurial/chgserver.py	Tue May 18 17:15:49 2021 -0700
@@ -516,10 +516,8 @@
                 self.ui.error(_(b"(%s)\n") % inst.hint)
             errorraised = True
         except error.Abort as inst:
-            if isinstance(inst, error.InputError):
-                detailed_exit_code = 10
-            elif isinstance(inst, error.ConfigError):
-                detailed_exit_code = 30
+            if inst.detailed_exit_code is not None:
+                detailed_exit_code = inst.detailed_exit_code
             self.ui.error(inst.format())
             errorraised = True