From e15c86020cf7879f0a91728c0e2734a26fe2ae26 Mon Sep 17 00:00:00 2001
From: Charles Iliya Krempeaux <iamreiver@gmail.com>
Date: Tue, 10 Sep 2019 08:27:52 -0700
Subject: [PATCH] utf8s.RuneError

---
 runeerror.go   | 9 +++++++++
 runescanner.go | 4 ++--
 2 files changed, 11 insertions(+), 2 deletions(-)
 create mode 100644 runeerror.go

diff --git a/runeerror.go b/runeerror.go
new file mode 100644
index 0000000..fe1702d
--- /dev/null
+++ b/runeerror.go
@@ -0,0 +1,9 @@
+package utf8s
+
+import (
+	"unicode/utf8"
+)
+
+const (
+	RuneError = utf8.RuneError
+)
diff --git a/runescanner.go b/runescanner.go
index b99a7ff..22a19b5 100644
--- a/runescanner.go
+++ b/runescanner.go
@@ -23,12 +23,12 @@ func NewRuneScanner(reader io.Reader) *RuneScanner {
 
 func (receiver *RuneScanner) ReadRune() (rune, int, error) {
 	if nil == receiver {
-		return 0, 0, errNilReceiver
+		return RuneError, 0, errNilReceiver
 	}
 
 	reader := receiver.reader
 	if nil == reader {
-		return 0, 0, errNilReader
+		return RuneError, 0, errNilReader
 	}
 
 	if receiver.peeked {