--- a/mercurial/mdiff.py	Fri Nov 19 09:17:30 2021 -0800
+++ b/mercurial/mdiff.py	Fri Nov 19 15:38:36 2021 -0800
@@ -84,7 +84,7 @@
         try:
             self.context = int(self.context)
         except ValueError:
-            raise error.Abort(
+            raise error.InputError(
                 _(b'diff context lines count must be an integer, not %r')
                 % pycompat.bytestr(self.context)
             )