when sudo moar and click v to start editor, it failed

[qbai]

sudo moar -style monokai -wrap .bashrc
Please post the following report at https://github.com/walles/moar/issues,
or e-mail it to johan.walles@gmail.com.

Version: v1.25.1
LANG : en_US.UTF-8
TERM : xterm-256color
MOAR :
EDITOR :

GOOS : linux
GOARCH : amd64
Compiler: gc
NumCPU : 4

time="Jul 31 11:14:03.655533" level=warning msg="Neither $VISUAL nor $EDITOR are set, can't launch any editor"
time="Jul 31 11:14:04.371535" level=warning msg="Neither $VISUAL nor $EDITOR are set, can't launch any editor"
time="Jul 31 11:14:04.881577" level=warning msg="Neither $VISUAL nor $EDITOR are set, can't launch any editor"
time="Jul 31 11:14:05.271462" level=warning msg="Neither $VISUAL nor $EDITOR are set, can't launch any editor"