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: [PATCH] rlp: don't panic for nil *big.Int
All other pointer types can handle nil just fine.
---
rlp/encode.go | 7 ++++++-
rlp/encode_test.go | 1 +
2 files changed, 7 insertions(+), 1 deletion(-)
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 {
diff --git a/rlp/encode_test.go b/rlp/encode_test.go
index c283fbd57..852cb6f59 100644
--- a/rlp/encode_test.go
+++ b/rlp/encode_test.go
@@ -196,6 +196,7 @@ var encTests = []encTest{
{val: (*uint)(nil), output: "80"},
{val: (*string)(nil), output: "80"},
{val: (*[]byte)(nil), output: "80"},
+ {val: (*big.Int)(nil), output: "80"},
{val: (*[]string)(nil), output: "C0"},
{val: (*[]interface{})(nil), output: "C0"},
{val: (*[]struct{ uint })(nil), output: "C0"},
--
GitLab