diff -r 2372284d9457 -r 687b865b95ad mercurial/cacheutil.py
--- a/mercurial/cacheutil.py	Sun Oct 06 09:45:02 2019 -0400
+++ b/mercurial/cacheutil.py	Sun Oct 06 09:48:39 2019 -0400
@@ -13,10 +13,10 @@
     """return the list of cache file valuable to copy during a clone"""
     # In local clones we're copying all nodes, not just served
     # ones. Therefore copy all branch caches over.
-    cachefiles = ['branch2']
-    cachefiles += ['branch2-%s' % f for f in repoview.filtertable]
-    cachefiles += ['rbc-names-v1', 'rbc-revs-v1']
-    cachefiles += ['tags2']
-    cachefiles += ['tags2-%s' % f for f in repoview.filtertable]
-    cachefiles += ['hgtagsfnodes1']
+    cachefiles = [b'branch2']
+    cachefiles += [b'branch2-%s' % f for f in repoview.filtertable]
+    cachefiles += [b'rbc-names-v1', b'rbc-revs-v1']
+    cachefiles += [b'tags2']
+    cachefiles += [b'tags2-%s' % f for f in repoview.filtertable]
+    cachefiles += [b'hgtagsfnodes1']
     return cachefiles