From 29ffa1c0c22ac11d9db4eb8047ae28650fa20c72 Mon Sep 17 00:00:00 2001
From: Idris Hanafi <ifh101@gmail.com>
Date: Tue, 27 Jun 2023 17:32:36 -0400
Subject: [PATCH] feat: nil guards

---
 cmd/rpcfuzz/argfuzz/argfuzz.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/cmd/rpcfuzz/argfuzz/argfuzz.go b/cmd/rpcfuzz/argfuzz/argfuzz.go
index d57907d9..9e2e0f60 100644
--- a/cmd/rpcfuzz/argfuzz/argfuzz.go
+++ b/cmd/rpcfuzz/argfuzz/argfuzz.go
@@ -39,6 +39,10 @@ func MutateExecutor(arg []byte, c fuzz.Continue) []byte {
 }
 
 func ByteMutator(arg []byte, c fuzz.Continue) []byte {
+    if arg == nil {
+        return arg
+    }
+
 	arg = MutateExecutor(arg, c)
 	// fitty-fitty chance of more mutations
 	if rand.Intn(2) == 0 && arg != nil {
@@ -50,6 +54,10 @@ func ByteMutator(arg []byte, c fuzz.Continue) []byte {
 
 func MutateRPCArgs(args *[]interface{}, c fuzz.Continue) {
 	for i, d := range *args {
+        if d == nil {
+            continue
+        }
+
 		switch d.(type) {
 		case string:
 			(*args)[i] = string(ByteMutator([]byte(d.(string)), c))