Debugger entered--Lisp error: (file-error "Opening directory" "Permission denied" "/sys/class/power_supply")
  directory-files("/sys/class/power_supply/" t)
  battery--find-linux-sysfs-batteries()
  (and (eq system-type 'gnu/linux) (file-directory-p "/sys/class/power_supply/") (battery--find-linux-sysfs-batteries))
  (cond ((and (eq system-type 'gnu/linux) (file-readable-p "/proc/apm")) #'battery-linux-proc-apm) ((and (eq system-type 'gnu/linux) (file-directory-p "/proc/acpi/battery")) #'battery-linux-proc-acpi) ((and (eq system-type 'gnu/linux) (file-directory-p "/sys/class/power_supply/") (battery--find-linux-sysfs-batteries)) #'battery-linux-sysfs) ((and (eq system-type 'berkeley-unix) (file-executable-p "/usr/sbin/apm")) #'battery-bsd-apm) ((and (eq system-type 'darwin) (condition-case nil (with-temp-buffer (and (eq (call-process "pmset" nil t nil "-g" "ps") 0) (> (buffer-size) 0))) (error nil))) #'battery-pmset) ((fboundp 'w32-battery-status) #'w32-battery-status))
  eval((cond ((and (eq system-type 'gnu/linux) (file-readable-p "/proc/apm")) #'battery-linux-proc-apm) ((and (eq system-type 'gnu/linux) (file-directory-p "/proc/acpi/battery")) #'battery-linux-proc-acpi) ((and (eq system-type 'gnu/linux) (file-directory-p "/sys/class/power_supply/") (battery--find-linux-sysfs-batteries)) #'battery-linux-sysfs) ((and (eq system-type 'berkeley-unix) (file-executable-p "/usr/sbin/apm")) #'battery-bsd-apm) ((and (eq system-type 'darwin) (condition-case nil (with-temp-buffer (and (eq ... 0) (> ... 0))) (error nil))) #'battery-pmset) ((fboundp 'w32-battery-status) #'w32-battery-status)))
  custom-initialize-reset(battery-status-function (cond ((and (eq system-type 'gnu/linux) (file-readable-p "/proc/apm")) #'battery-linux-proc-apm) ((and (eq system-type 'gnu/linux) (file-directory-p "/proc/acpi/battery")) #'battery-linux-proc-acpi) ((and (eq system-type 'gnu/linux) (file-directory-p "/sys/class/power_supply/") (battery--find-linux-sysfs-batteries)) #'battery-linux-sysfs) ((and (eq system-type 'berkeley-unix) (file-executable-p "/usr/sbin/apm")) #'battery-bsd-apm) ((and (eq system-type 'darwin) (condition-case nil (with-temp-buffer (and (eq ... 0) (> ... 0))) (error nil))) #'battery-pmset) ((fboundp 'w32-battery-status) #'w32-battery-status)))
  custom-declare-variable(battery-status-function (cond ((and (eq system-type 'gnu/linux) (file-readable-p "/proc/apm")) #'battery-linux-proc-apm) ((and (eq system-type 'gnu/linux) (file-directory-p "/proc/acpi/battery")) #'battery-linux-proc-acpi) ((and (eq system-type 'gnu/linux) (file-directory-p "/sys/class/power_supply/") (battery--find-linux-sysfs-batteries)) #'battery-linux-sysfs) ((and (eq system-type 'berkeley-unix) (file-executable-p "/usr/sbin/apm")) #'battery-bsd-apm) ((and (eq system-type 'darwin) (condition-case nil (with-temp-buffer (and (eq ... 0) (> ... 0))) (error nil))) #'battery-pmset) ((fboundp 'w32-battery-status) #'w32-battery-status)) "Function for getting battery status information.\nT..." :type (choice (const nil) function) :group battery)
  byte-code("\300\301\302\303\304\305\306\307&\7\210\300\310\311\312\304\313\306\307&\7\207" [custom-declare-variable battery-status-function (cond ((and (eq system-type 'gnu/linux) (file-readable-p "/proc/apm")) #'battery-linux-proc-apm) ((and (eq system-type 'gnu/linux) (file-directory-p "/proc/acpi/battery")) #'battery-linux-proc-acpi) ((and (eq system-type 'gnu/linux) (file-directory-p "/sys/class/power_supply/") (battery--find-linux-sysfs-batteries)) #'battery-linux-sysfs) ((and (eq system-type 'berkeley-unix) (file-executable-p "/usr/sbin/apm")) #'battery-bsd-apm) ((and (eq system-type 'darwin) (condition-case nil (with-temp-buffer (and ... ...)) (error nil))) #'battery-pmset) ((fboundp 'w32-battery-status) #'w32-battery-status)) "Function for getting battery status information.\nT..." :type (choice (const nil) function) :group battery battery-echo-area-format "Power %L, battery %B (%p%% load, remaining time %t..." "Control string formatting the string to display in..." (choice string (const nil))] 8)
  (battery)
  (progn (battery))
  eval((progn (battery)) t)
  elisp--eval-last-sexp(nil)
  eval-last-sexp(nil)
  funcall-interactively(eval-last-sexp nil)
  call-interactively(eval-last-sexp nil nil)
  command-execute(eval-last-sexp)