helm-gtags can not create valid gtags file with pygments

[phenix3443]

i installed gtags and set correct env variable like this:

and i generate gtags files from command line

obviously, the gtags use pygments to generate files.
and i can find some word as symbol by global:

that means global and gtags works correctly.

but when i use helm-gtags-create-tags with pygments as gtagslabel to create gtags files, global can not use these files to search same word:

some system and emacs version info:

install hhelm-gtags-20170115.2129 from elpa, and config it in .emacs.d/init.el as follow:
`
(use-package helm-gtags
:ensure t
:init
(add-hook 'prog-mode-hook 'helm-gtags-mode)
(custom-set-variables
'(helm-gtags-prefix-key "\C-c g")
;; '(helm-gtags-suggested-key-mapping t)
)
:bind (:map helm-gtags-mode-map
("C-c g a" . helm-gtags-tags-in-this-function)
("C-c g b" . helm-gtags-display-browser)
("C-c g c" . helm-gtags-clear-cache)
("C-c g d" . helm-gtags-clear-all-cache)
("C-c g f" . helm-gtags-find-files)
("C-c g g" . helm-gtags-create-tags)
("C-c g u" . helm-gtags-update-tags)
("C-c g j" . helm-gtags-select)
("C-c g p" . helm-gtags-pop-stack)
("C-c g q" . helm-gtags-clear-stack)
("C-c g Q" . helm-gtags-clear-all-stacks)
("C-c g s" . helm-gtags-find-symbol)
("C-c g r" . helm-gtags-find-rtag)
("C-c g t" . helm-gtags-find-tag)
("C-c g ," . helm-gtags-find-tag-from-here)
("C-c g T" . helm-gtags-find-tag-other-window)
("C-c g R" . helm-gtags-resume)
("C-c g P" . helm-gtags-parse-file)
("C-c g S" . helm-gtags-find-pattern)
("C-c g ." . helm-gtags-dwim)
("C-c g <" . helm-gtags-previous-history)
("C-c g >" . helm-gtags-next-history)
)
:config

(custom-set-variables
'(helm-gtags-auto-update t)
'(helm-gtags-cache-select-result nil)
'(helm-gtags-direct-helm-completing t)
'(helm-gtags-display-style 'detail)
'(helm-gtags-fuzzy-match nil)
'(helm-gtags-highlight-candidate t)
'(helm-gtags-ignore-case nil)
'(helm-gtags-parse-file 'root)
'(helm-gtags-path-style 'root)
'(helm-gtags-pulse-at-cursor t)
'(helm-gtags-read-only nil)
'(helm-gtags-update-interval-second 30)
'(helm-gtags-use-input-at-cursor t)
)
)

`
is this a bug?

[syohex]

Sorry very late reply. Could you see gtags enviroment variable from Emacs ? You can see it by evaluating following s-expression in emacs.

(getenv "GTAGSCONF")

If not, please set environment variable in your configuration file as below

;; value is your gtags.conf path
(setenv "GTAGSCONF" "/usr/local/share/gtags/gtags.conf")

I create tag file work well with above environment variable setting.