diff -r 7755b89cadaf -r 69921d02daaf mercurial/httppeer.py
--- a/mercurial/httppeer.py	Wed Mar 06 15:06:53 2019 +0100
+++ b/mercurial/httppeer.py	Wed Apr 17 17:56:30 2019 +0200
@@ -382,6 +382,7 @@
         self._path = path
         self._url = url
         self._caps = caps
+        self.limitedarguments = caps is not None and 'httppostargs' not in caps
         self._urlopener = opener
         self._requestbuilder = requestbuilder
 
@@ -750,6 +751,9 @@
 
 @interfaceutil.implementer(repository.ipeerv2)
 class httpv2peer(object):
+
+    limitedarguments = False
+
     def __init__(self, ui, repourl, apipath, opener, requestbuilder,
                  apidescriptor):
         self.ui = ui