Template replacements acutally propegate through the function now - but it doesn't decorate names so that same named functions with same parameters but instantiated by different types but with the resulting same prototype, so they end up having the same name in C, which needs to be addressed.

stdlib/ast_nodes.krak

@@ -1041,9 +1041,11 @@ fun ast_to_dot(root: *ast_node): string {
         node_name_map.set(node, escaped)
         return escaped
     }
+    var done_set = set<*ast_node>()
     var helper: fun(*ast_node):void = fun(node: *ast_node) {
+        done_set.add(node)
         get_ast_children(node).for_each(fun(child: *ast_node) {
-            if (!child)
+            if (!child || done_set.contains(child))
                 return; // where on earth does the null come from
             ret += string("\"") + get_name(node) + "\" -> \"" + get_name(child) + "\"\n";
             helper(child)