diff -r cdc93fe1da77 -r e69e65b2b4a9 mercurial/hgweb/hgweb_mod.py
--- a/mercurial/hgweb/hgweb_mod.py	Wed Jan 31 16:21:43 2018 -0800
+++ b/mercurial/hgweb/hgweb_mod.py	Wed Jan 31 16:43:46 2018 -0800
@@ -368,7 +368,6 @@
                     raise ErrorResponse(HTTP_NOT_FOUND)
                 if cmd in perms:
                     self.check_perm(rctx, req, perms[cmd])
-                return protohandler['dispatch']()
             except ErrorResponse as inst:
                 # A client that sends unbundle without 100-continue will
                 # break if we respond early.
@@ -383,6 +382,8 @@
                             body='0\n%s\n' % inst)
                 return ''
 
+            return protohandler['dispatch']()
+
         # translate user-visible url structure to internal structure
 
         args = query.split('/', 2)