From aac88a8fadf44be9540f821b455fec1a268fd88a Mon Sep 17 00:00:00 2001
From: ston1th <ston1th@giftfish.de>
Date: Sun, 26 Sep 2021 19:30:58 +0200
Subject: [PATCH] fixed nil pointer

---
 alloc.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/alloc.go b/alloc.go
index d9dc250..c4aab2b 100644
--- a/alloc.go
+++ b/alloc.go
@@ -64,7 +64,10 @@ func (a *GenericAlloc) Alloc() (ip *net.IPAddr, err error) {
 
 func (a *GenericAlloc) AllocCIDR() (cidr string, err error) {
 	ip, err := a.Alloc()
-	return CIDR(a.prefix, ip), err
+	if err != nil {
+		return
+	}
+	return CIDR(a.prefix, ip), nil
 }
 
 func (a *GenericAlloc) Free(ip *net.IPAddr) (err error) {