From 31d0f6cf8a84a5a09412caf54b92c1cca886c6c7 Mon Sep 17 00:00:00 2001
From: xukesong <linuxsong@gmail.com>
Date: Thu, 13 Jul 2023 14:54:24 +0800
Subject: [PATCH] fix isPathShadowedInFlatMap type cast bug

---
 viper.go | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/viper.go b/viper.go
index 0158a7f..0e63350 100644
--- a/viper.go
+++ b/viper.go
@@ -827,9 +827,11 @@ func (v *Viper) isPathShadowedInDeepMap(path []string, m map[string]interface{})
 func (v *Viper) isPathShadowedInFlatMap(path []string, mi interface{}) string {
 	// unify input map
 	var m map[string]interface{}
-	switch mi.(type) {
-	case map[string]string, map[string]FlagValue:
-		m = cast.ToStringMap(mi)
+	switch miv := mi.(type) {
+	case map[string]string:
+		m = castMapStringToMapInterface(miv)
+	case map[string]FlagValue:
+		m = castMapFlagToMapInterface(miv)
 	default:
 		return ""
 	}