From 493a01c4feed2ac178a305570fb488d144c5ea0f Mon Sep 17 00:00:00 2001
From: Christian Schwarz <me@cschwarz.com>
Date: Thu, 5 Oct 2017 21:23:39 +0200
Subject: [PATCH] logger: fix nil pointer deref in WithError

fixes #9
---
 logger/logger.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/logger/logger.go b/logger/logger.go
index 269b987..b0a7689 100644
--- a/logger/logger.go
+++ b/logger/logger.go
@@ -102,7 +102,11 @@ func (l *Logger) WithFields(fields Fields) (ret *Logger) {
 }
 
 func (l *Logger) WithError(err error) *Logger {
-	return l.WithField(FieldError, err.Error())
+	val := interface{}(nil)
+	if err != nil {
+		val = err.Error()
+	}
+	return l.WithField(FieldError, val)
 }
 
 func (l *Logger) Debug(msg string) {