From 925f54edcf9fabbd76dca27a93cd6db81cce1d64 Mon Sep 17 00:00:00 2001
From: Yuval Dahan <yuvaldahn@gmail.com>
Date: Thu, 6 Feb 2020 18:05:59 +0200
Subject: [PATCH] Verified flag != nil in viper.BindPFlag

---
 viper.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/viper.go b/viper.go
index a8f84b5..35e29a9 100644
--- a/viper.go
+++ b/viper.go
@@ -980,6 +980,9 @@ func (v *Viper) BindPFlags(flags *pflag.FlagSet) error {
 //
 func BindPFlag(key string, flag *pflag.Flag) error { return v.BindPFlag(key, flag) }
 func (v *Viper) BindPFlag(key string, flag *pflag.Flag) error {
+	if flag == nil {
+		return fmt.Errorf("flag for %q is nil", flag)
+	}
 	return v.BindFlagValue(key, pflagValue{flag})
 }