1 files changed, 7 insertions, 0 deletions
diff --git a/ptrie/fullnode.go b/ptrie/fullnode.go
index 7a7f7d22d..d6b0745ec 100644
--- a/ptrie/fullnode.go
+++ b/ptrie/fullnode.go
@@ -1,5 +1,7 @@
 package ptrie
 
+import "fmt"
+
 type FullNode struct {
 	trie  *Trie
 	nodes [17]Node
@@ -56,6 +58,11 @@ func (self *FullNode) RlpData() interface{} {
 }
 
 func (self *FullNode) set(k byte, value Node) {
+	if _, ok := value.(*ValueNode); ok && k != 16 {
+		fmt.Println(value, k)
+		panic(":(")
+	}
+
 	self.nodes[int(k)] = value
 }