mapstructure fails to unmarshal when the type is string slice

[pantelis-karamolegkos]

Although came across this when using viper, I believe this is a mapstructure issue

I am defining a slice flag as follows

fs.StringArray(name, sliceValue, help)

where sliceValue: = []string{"PUT", "POST"}

The corresponding Config struct field is the following

CORSAllowMethods []string `mapstructure:"CORS_ALLOW_METHODS" name:"cors-allow-methods" long:"cors-allow-methods" defaultValue:"PUT POST" help:"List of CORS methods that are allowed"`

After performing a v.Unmarshal(&conf) was expecting something like this:

CORSAllowMethods:[PUT POST]

The end result after v.Unmarshal(&conf) is

CORSAllowMethods:[[PUT POST]]

(a nested slice???!!!)