--- a/mercurial/scmutil.py	Tue Nov 17 15:51:09 2020 -0800
+++ b/mercurial/scmutil.py	Thu Oct 22 14:14:59 2020 -0700
@@ -261,6 +261,8 @@
             detailed_exit_code = 20
         elif isinstance(inst, error.ConfigError):
             detailed_exit_code = 30
+        elif isinstance(inst, error.CanceledError):
+            detailed_exit_code = 250
         ui.error(_(b"abort: %s\n") % inst.message)
         if inst.hint:
             ui.error(_(b"(%s)\n") % inst.hint)