diff -r 649d3ac37a12 -r d783f945a701 mercurial/logexchange.py
--- a/mercurial/logexchange.py	Sun Oct 06 19:25:18 2019 -0400
+++ b/mercurial/logexchange.py	Mon Oct 07 00:04:04 2019 -0400
@@ -11,6 +11,7 @@
 from .node import hex
 
 from . import (
+    pycompat,
     util,
     vfs as vfsmod,
 )
@@ -74,7 +75,7 @@
         if oldpath != remotepath:
             f.write(b'%s\0%s\0%s\n' % (node, oldpath, rname))
 
-    for name, node in sorted(names.iteritems()):
+    for name, node in sorted(pycompat.iteritems(names)):
         if nametype == b"branches":
             for n in node:
                 f.write(b'%s\0%s\0%s\n' % (n, remotepath, name))
@@ -153,7 +154,7 @@
     with remoterepo.commandexecutor() as e:
         branchmap = e.callcommand(b'branchmap', {}).result()
 
-    for branch, nodes in branchmap.iteritems():
+    for branch, nodes in pycompat.iteritems(branchmap):
         bmap[branch] = []
         for node in nodes:
             if node in repo and not repo[node].obsolete():