From cb009a5c4da40e1987b9dfcffa4d52bcae41e4e1 Mon Sep 17 00:00:00 2001
From: Felix Lange <fjl@twurst.com>
Date: Tue, 17 Mar 2015 23:49:49 +0100
Subject: rlp: don't panic for nil *big.Int

All other pointer types can handle nil just fine.
---
 rlp/encode.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'rlp/encode.go')

diff --git a/rlp/encode.go b/rlp/encode.go
index 9d11d66bf..42bbb876c 100644
--- a/rlp/encode.go
+++ b/rlp/encode.go
@@ -386,7 +386,12 @@ func writeUint(val reflect.Value, w *encbuf) error {
 }
 
 func writeBigIntPtr(val reflect.Value, w *encbuf) error {
-	return writeBigInt(val.Interface().(*big.Int), w)
+	ptr := val.Interface().(*big.Int)
+	if ptr == nil {
+		w.str = append(w.str, 0x80)
+		return nil
+	}
+	return writeBigInt(ptr, w)
 }
 
 func writeBigIntNoPtr(val reflect.Value, w *encbuf) error {
-- 
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