diff -r 8d14d91584f1 -r 5997eabc7b85 mercurial/discovery.py
--- a/mercurial/discovery.py	Tue Apr 16 02:06:20 2019 +0530
+++ b/mercurial/discovery.py	Fri Mar 01 05:56:18 2019 +0530
@@ -340,13 +340,22 @@
     pushop.pushbranchmap = headssum
     newbranches = [branch for branch, heads in headssum.iteritems()
                    if heads[0] is None]
+    # Makes a set of closed branches
+    closedbranches = set()
+    for tag, heads, tip, isclosed in repo.branchmap().iterbranches():
+        if isclosed:
+            closedbranches.add(tag)
+    closedbranches = (closedbranches & set(newbranches))
     # 1. Check for new branches on the remote.
     if newbranches and not newbranch:  # new branch requires --new-branch
         branchnames = ', '.join(sorted(newbranches))
-        raise error.Abort(_("push creates new remote branches: %s!")
-                           % branchnames,
-                         hint=_("use 'hg push --new-branch' to create"
-                                " new remote branches"))
+        if closedbranches:
+            errmsg = (_("push creates new remote branches: %s (%d closed)!")
+                        % (branchnames, len(closedbranches)))
+        else:
+            errmsg = (_("push creates new remote branches: %s!")% branchnames)
+        hint=_("use 'hg push --new-branch' to create new remote branches")
+        raise error.Abort(errmsg, hint=hint)
 
     # 2. Find heads that we need not warn about
     nowarnheads = _nowarnheads(pushop)