bug#20660: 25.0.50; Window pops now issue "Args out of range" with popwin mode enabled

[Kaushal <kaushal.modi@gmail.com>]

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In GNU Emacs 25.0.50.2 (x86_64-unknown-linux-gnu, GTK+ Version 2.10.4)
 of 2015-05-26 on ...
Windowing system distributor `The X.Org Foundation', version 11.0.60900000
System Description: Red Hat Enterprise Linux Client release 5.10 (Tikanga)

*Emacs
build: http://git.savannah.gnu.org/cgit/emacs.git/commit/?id=45c92ddd99f5d3ceb520f9a27678bbedde83589b
<http://git.savannah.gnu.org/cgit/emacs.git/commit/?id=45c92ddd99f5d3ceb520f9a27678bbedde83589b>*

Configured using:
 `configure --prefix=/home/kmodi/usr_local/apps/emacs/master
 CPPFLAGS=-fgnu89-inline'

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS
NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE LIBOTF XFT ZLIB

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Emacs-Lisp


I started getting the "Args out of range" messages in the *Messages* buffer
after I built emacs using the latest master today. My previous build was
about a week back.

Only after this build, I started getting "Args out of range" every time I
use something like "C-h v" that uses the popwin-mode (
https://github.com/m2ym/popwin-el ).

I don't get these Args out of range messages if I do not load popwin; but
also these messages did not appear a week ago with popwin enabled.

I did not get any informative backtrace with

M-x debug-on-error

or

(setq debug-on-message "Args out of range")

Is this a bug or some change incompatible with popwin-mode?
Minor modes in effect:
  yas-minor-mode: t
  minibuffer-line-mode: t
  flyspell-mode: t
  guide-key-mode: t
  popwin-mode: t
  desktop-save-mode: t
  nlinum-mode: t
  pdf-occur-global-minor-mode: t
  global-anzu-mode: t
  anzu-mode: t
  recentf-mode: t
  winner-mode: t
  yafolding-mode: t
  wrap-region-mode: t
  global-undo-tree-mode: t
  undo-tree-mode: t
  rainbow-delimiters-mode: t
  projectile-global-mode: t
  projectile-mode: t
  global-page-break-lines-mode: t
  page-break-lines-mode: t
  keyfreq-autosave-mode: t
  keyfreq-mode: t
  diff-hl-mode: t
  diff-auto-refine-mode: t
  ido-ubiquitous-mode: t
  ido-vertical-mode: t
  flx-ido-mode: t
  ido-everywhere: t
  global-hungry-delete-mode: t
  hungry-delete-mode: t
  volatile-highlights-mode: t
  global-hi-lock-mode: t
  hi-lock-mode: t
  global-hardcore-mode: t
  hardcore-mode: t
  fci-mode: t
  elisp-slime-nav-mode: t
  drag-stuff-global-mode: t
  drag-stuff-mode: t
  aggressive-indent-mode: t
  ace-window-display-mode: t
  global-adaptive-wrap-prefix-mode: t
  adaptive-wrap-prefix-mode: t
  display-time-mode: t
  which-function-mode: t
  shell-dirtrack-mode: t
  outline-minor-mode: t
  ctags-auto-update-mode: t
  global-modi-mode: t
  modi-mode: t
  override-global-mode: t
  save-place-mode: t
  show-paren-mode: t
  delete-selection-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  abbrev-mode: t

Recent messages:
Wrote /home/kmodi/.emacs.d/init.el
Searching for setup-popwin...
Mark set [2 times]
Indenting region...done
Saving file /home/kmodi/.emacs.d/setup-files/setup-popwin.el...
Wrote /home/kmodi/.emacs.d/setup-files/setup-popwin.el
t
 [2 times]
Args out of range: 812
Revert buffer from file /home/kmodi/.emacs.d/setup-files/setup-popwin.el?
(y or n) y

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