diff -r 3ea8323d6f95 -r 0c184ca594bb mercurial/wireprotov2server.py
--- a/mercurial/wireprotov2server.py	Sat Apr 14 15:19:36 2018 -0700
+++ b/mercurial/wireprotov2server.py	Sat Apr 14 15:36:12 2018 -0700
@@ -311,7 +311,7 @@
                                                       command['requestid'],
                                                       encoded)
     else:
-        action, meta = reactor.onapplicationerror(
+        action, meta = reactor.onservererror(
             _('unhandled response type from wire proto command'))
 
     if action == 'sendframes':