====== Error perl: warning: Setting locale failed ======
Mendapatkan Error 
<code>
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LANGUAGE = (unset),
	LC_ALL = (unset),
	LC_MEASUREMENT = "id_ID.UTF-8",
	LC_PAPER = "id_ID.UTF-8",
	LC_MONETARY = "id_ID.UTF-8",
	LC_NAME = "id_ID.UTF-8",
	LC_ADDRESS = "id_ID.UTF-8",
	LC_NUMERIC = "id_ID.UTF-8",
	LC_TELEPHONE = "id_ID.UTF-8",
	LC_IDENTIFICATION = "id_ID.UTF-8",
	LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to a fallback locale ("en_US.UTF-8").
</code>

solusi
<code>
export LC_CTYPE=en_US.UTF-8
export LC_ALL=en_US.UTF-8
</code>

atau jika menggunakan zsh

<code>
# Setting for the new UTF-8 terminal support in Lion
LC_CTYPE=en_US.UTF-8
LC_ALL=en_US.UTF-8
</code>

sumber : https://stackoverflow.com/questions/2499794/how-to-fix-a-locale-setting-warning-from-perl