Subject: bug#18764: 24.4; electric-indent in *scratch* signals an error

From: Eli Zaretskii <[email-masked]>
Date: Sat, 18 Oct 2014 17:59:12 +0300

In "emacs -Q":

1) Insert the following long sequence of left parens followed by a somewhat
shorter sequence of right parens:

((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((()))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))

2) Put cursor after the last right parenthesis, and type RET

3) Emacs signals an error:

   lisp-indent-line: Wrong type argument: number-or-marker-p, nil

Here's the Lisp backtrace:

  Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
    calculate-lisp-indent()
    lisp-indent-line()
    indent-according-to-mode()
    electric-indent-post-self-insert-function()
    self-insert-command(1)
    newline(nil 1)
    funcall-interactively(newline nil 1)
    call-interactively(newline nil nil)
    command-execute(newline)

In GNU Emacs 24.4.1 (i686-pc-mingw32)
 of 2014-10-17 on HOME-C4E4A596F7
Windowing system distributor `Microsoft Corp.', version 5.1.2600
Configured using:
 `configure --prefix=/d/usr'

Important settings:
  value of $LANG: ENU
  locale-coding-system: cp1255

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( 
( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( 
( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( 
( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( <return> 
C-/ ) <return> C-/ ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) 
) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) 
) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) <return> 
C-/ ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) 
<return> C-/ ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) <return> 
<backspace> <backspace> <backspace> <backspace> <return> 
<help-echo> <up> <up> <up> <C-end> <return> ( ( ( ( 
( ( ( ( ( ( ( ( ( ) ) ) ) ) ) ) ) ) ) ) <return> C-/ 
) <return> C-/ ) <return> C-/ ) <return> <up> <up> 
<C-end> <return> <return> C-y <return> C-/ M-x r e 
p o r t - e m <tab> <return>

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Undo! [4 times]
Mark set
Undo! [3 times]
Mark set [2 times]
lisp-indent-line: Wrong type argument: number-or-marker-p, nil
Undo!

Load-path shadows:
None found.

Features:
(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
easymenu mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231
mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums
mm-util help-fns mail-prsvr mail-utils time-date tooltip electric
uniquify ediff-hook vc-hooks lisp-float-type mwheel dos-w32 ls-lisp
w32-common-fns disp-table w32-win w32-vars tool-bar dnd fontset image
regexp-opt fringe tabulated-list newcomment lisp-mode prog-mode register
page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock
font-lock syntax facemenu font-core frame cham georgian utf-8-lang
misc-lang vietnamese tibetan thai tai-viet lao korean japanese hebrew
greek romanian slovak czech european ethiopic indian cyrillic chinese
case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer nadvice
loaddefs button faces cus-face macroexp files text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote make-network-process w32notify w32
multi-tty emacs)

Memory information:
((conses 8 74585 7049)
 (symbols 32 17521 0)
 (miscs 32 45 339)
 (strings 16 10814 3613)
 (string-bytes 1 269937)
 (vectors 8 9552)
 (vector-slots 4 385033 4696)
 (floats 8 58 351)
 (intervals 28 279 94)
 (buffers 508 11))