From d824ea415d050f5b41ce7eb680b137de653c843e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Carlos=20Mart=C3=ADn=20Nieto?= <cmn@dwim.me>
Date: Tue, 21 May 2013 11:51:31 +0200
Subject: [PATCH] Catch nil error instances

Unfortunately libgit2 sometimes returns an error without setting an
error message. Provide an alternative message instead of trying to
dereference nil.
---
 git.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/git.go b/git.go
index fdc640a..387d81e 100644
--- a/git.go
+++ b/git.go
@@ -10,6 +10,7 @@ import (
 	"bytes"
 	"unsafe"
 	"strings"
+	"fmt"
 )
 
 const (
@@ -107,6 +108,9 @@ func (e GitError) Error() string{
 
 func LastError() error {
 	err := C.giterr_last()
+	if err == nil {
+		return &GitError{"No message", 0}
+	}
 	return &GitError{C.GoString(err.message), int(err.klass)}
 }