--- tools/rewrite_rule_gen/rewrite_rule_gen.cpp.orig	2015-11-22 12:32:02.000000000 -0700
+++ tools/rewrite_rule_gen/rewrite_rule_gen.cpp	2016-02-20 20:08:02.920074762 -0700
@@ -1228,7 +1228,7 @@
   for (size_t i = 0; i < n.Degree(); i++)
   {
     char t[1000];
-    sprintf(t, "%s[%d]", current.c_str(), i);
+    sprintf(t, "%s[%zu]", current.c_str(), i);
     string s(t);
     rule_to_string(n[i], names, s, sofar);
   }
@@ -1247,7 +1247,7 @@
   for (size_t i = 0; i < n.Degree(); i++)
   {
     char t[1000];
-    sprintf(t, "%s[%d]", current.c_str(), i);
+    sprintf(t, "%s[%zu]", current.c_str(), i);
     string s(t);
     string r = containsNode(n[i], hunting, s);
     if (r != "")
@@ -1477,7 +1477,7 @@
   for (size_t i = 0; i < n.Degree(); i++)
   {
     char t[1000];
-    sprintf(t, "%s[%d]", current.c_str(), i);
+    sprintf(t, "%s[%zu]", current.c_str(), i);
     string s(t);
     visit_all(n[i], visited, s);
   }