diff -r fb5803f4fb87 -r 86f980a8cacf mercurial/hgweb/webcommands.py
--- a/mercurial/hgweb/webcommands.py	Wed Apr 04 20:48:00 2018 +0900
+++ b/mercurial/hgweb/webcommands.py	Wed Apr 04 20:48:37 2018 +0900
@@ -1344,7 +1344,7 @@
             entry.update({'col': vtx[0],
                           'color': (vtx[1] - 1) % 6 + 1,
                           'parity': next(parity),
-                          'edges': edgedata,
+                          'edges': templateutil.mappinglist(edgedata),
                           'row': row,
                           'nextrow': row + 1})