I already had the queue.el installed for a long time. But today I decided
to delete the elpa dir and install all packages afresh.

The batch package installation progressed fine until it reached the point
of installing queue.el. The installation aborted because of this error:

Debugger entered--Lisp error: (error "Failed to verify signature
queue-0.1.1.el.sig: (\"Bad signature from 474F05837FBDEF9B GNU ELPA Signing
Agent <elpasign@elpa.gnu.org>\")")
  signal(error ("Failed to verify signature queue-0.1.1.el.sig: (\"Bad
signature from 474F05837FBDEF9B GNU ELPA Signing Agent <
elpasign@elpa.gnu.org>\")"))
  error("Failed to verify signature %s: %S" "queue-0.1.1.el.sig" ("Bad
signature from 474F05837FBDEF9B GNU ELPA Signing Agent <
elpasign@elpa.gnu.org>"))
  package--check-signature("http://elpa.gnu.org/packages/" "queue-0.1.1.el")
  package-install-from-archive([cl-struct-package-desc queue (0 1 1) "Queue
data structure" nil single "gnu" nil ((:url . "
http://www.dr-qubit.org/emacs.php") (:keywords "extensions" "data
structures" "queue")) nil])
  mapc(package-install-from-archive ([cl-struct-package-desc queue (0 1 1)
"Queue data structure" nil single "gnu" nil ((:url . "
http://www.dr-qubit.org/emacs.php") (:keywords "extensions" "data
structures" "queue")) nil] [cl-struct-package-desc clojure-mode (20160226
956) "Major mode for Clojure code" ((emacs (24 3))) single "melpa" nil
((:url . "http://github.com/clojure-emacs/clojure-mode") (:keywords
"languages" "clojure" "clojurescript" "lisp")) nil] [cl-struct-package-desc
cider (20160309 808) "Clojure Interactive Development Environment that
Rocks" ((emacs (24 3)) (clojure-mode (5 2 0)) (pkg-info (0 4)) (queue (0 1
1)) (spinner (1 7)) (seq (1 9))) tar "melpa" nil ((:url . "
http://www.github.com/clojure-emacs/cider") (:keywords "languages"
"clojure" "cider")) nil]))
  package-download-transaction(([cl-struct-package-desc queue (0 1 1)
"Queue data structure" nil single "gnu" nil ((:url . "
http://www.dr-qubit.org/emacs.php") (:keywords "extensions" "data
structures" "queue")) nil] [cl-struct-package-desc clojure-mode (20160226
956) "Major mode for Clojure code" ((emacs (24 3))) single "melpa" nil
((:url . "http://github.com/clojure-emacs/clojure-mode") (:keywords
"languages" "clojure" "clojurescript" "lisp")) nil] [cl-struct-package-desc
cider (20160309 808) "Clojure Interactive Development Environment that
Rocks" ((emacs (24 3)) (clojure-mode (5 2 0)) (pkg-info (0 4)) (queue (0 1
1)) (spinner (1 7)) (seq (1 9))) tar "melpa" nil ((:url . "
http://www.github.com/clojure-emacs/cider") (:keywords "languages"
"clojure" "cider")) nil]))
  package-install(cider)


In GNU Emacs 24.5.2 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.23)
 of 2015-10-14 on
Windowing system distributor `The X.Org Foundation', version 11.0.60900000
System Description: Red Hat Enterprise Linux Workstation release 6.6
(Santiago)

Configured using:
 `configure --prefix=/cad/adi/apps/gnu/linux/x86_64/6/local/emacs/24.5
 --with-gif=no --with-x-toolkit=gtk2'

Important settings:
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=none
  locale-coding-system: utf-8-unix

Major mode: Fundamental

Minor modes in effect:
  which-key-mode: t
  global-hardcore-mode: t
  hardcore-mode: t
  minibuffer-line-mode: t
  global-undo-tree-mode: t
  undo-tree-mode: t
  global-page-break-lines-mode: t
  page-break-lines-mode: t
  keyfreq-autosave-mode: t
  keyfreq-mode: t
  global-hungry-delete-mode: t
  hungry-delete-mode: t
  volatile-highlights-mode: t
  engine-mode: t
  drag-stuff-global-mode: t
  drag-stuff-mode: t
  beacon-mode: t
  ace-window-display-mode: t
  shackle-mode: t
  display-time-mode: t
  modi-mode: t
  global-auto-complete-mode: t
  diff-auto-refine-mode: t
  projectile-global-mode: t
  projectile-mode: t
  Info-breadcrumbs-in-mode-line-mode: t
  async-bytecomp-package-mode: t
  global-hi-lock-mode: t
  hi-lock-mode: t
  shell-dirtrack-mode: t
  ivy-mode: t
  override-global-mode: t
  show-paren-mode: t
  delete-selection-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
  transient-mark-mode: t



--
Kaushal Modi