From bcdfa9abcfaa614da7d9b6f0df893f3d977fae5a Mon Sep 17 00:00:00 2001
From: ramkimpls <ramki.nyc@gmail.com>
Date: Thu, 18 Jan 2024 17:30:27 -0600
Subject: [PATCH] fix:add keypath to shadow set when map empty

---
 viper.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/viper.go b/viper.go
index 20eb4da..2d0cdd8 100644
--- a/viper.go
+++ b/viper.go
@@ -2097,6 +2097,10 @@ func (v *Viper) flattenAndMergeMap(shadow map[string]bool, m map[string]any, pre
 	if shadow == nil {
 		shadow = make(map[string]bool)
 	}
+	if len(m) == 0 && prefix != ""{
+		shadow[strings.ToLower(prefix)]=true
+		return shadow
+	}
 
 	var m2 map[string]any
 	if prefix != "" {