diff -r ab632e27f296 -r 14d0e89520a2 mercurial/hgweb/webutil.py
--- a/mercurial/hgweb/webutil.py	Wed Jan 29 14:42:54 2020 -0800
+++ b/mercurial/hgweb/webutil.py	Tue Jan 28 21:49:50 2020 -0800
@@ -936,5 +936,5 @@
 
 def getgraphnode(repo, ctx):
     return templatekw.getgraphnodecurrent(
-        repo, ctx
+        repo, ctx, {}
     ) + templatekw.getgraphnodesymbol(ctx)