diff -r eb2945f0a4a1 -r afc4ad706f9c mercurial/commandserver.py
--- a/mercurial/commandserver.py	Thu Jul 19 15:21:28 2018 -0400
+++ b/mercurial/commandserver.py	Thu Jul 19 23:22:05 2018 -0700
@@ -353,7 +353,7 @@
         # handle exceptions that may be raised by command server. most of
         # known exceptions are caught by dispatch.
         except error.Abort as inst:
-            ui.warn(_('abort: %s\n') % inst)
+            ui.error(_('abort: %s\n') % inst)
         except IOError as inst:
             if inst.errno != errno.EPIPE:
                 raise