Preflight Checklist

[X] I have searched the issue tracker for an issue that matches the one I want to file, without success.
[X] I am not looking for support or already pursued the available support channels without success.
[X] I have checked the troubleshooting guide for my problem, without success.

Viper Version

1.15.0

Go Version

1.19.14

Config Source

Files

Format

Other (specify below)

Repl.it link

https://replit.com/@zhangfanordomoz/bugaboutdollar?v=1

Code reproducing the issue

package main

import (
    "github.com/spf13/viper"
)

const (
    DevConfigPath = "conf/dev/"
    ConfigPath    = DevConfigPath
)


type Configuration struct {
    x string `mapstructure:"x"`
}

func main() {
  config, _ := LoadConfig(ConfigPath)
  if config.x != "$ab"{
    panic("The bug is reproduced!")
  }
}



func LoadConfig(path string) (config Configuration, err error) {
    viper.AddConfigPath(path)
    viper.SetConfigFile("env")
    viper.SetConfigName("config")

    viper.AutomaticEnv()

    err = viper.ReadInConfig()
    if err != nil {
        panic(err)
        return
    }

    err = viper.Unmarshal(&config)
    if err != nil {
        panic(err)
    }
    return
}

Expected Behavior

X should be equal to "$ab"

Actual Behavior

X is "b".

Steps To Reproduce

config.env

x="$ab"

Additional Information

The format is .env

Comment From: github-actions[bot]

👋 Thanks for reporting!

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