'next-line' skips a line

[Kousik Nandy]

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Please write in English if possible, because the Emacs maintainers
usually do not have translators to read other languages for them.

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Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

I have loaded emacs with -q and --no-site-file to reduce dependencies.
Now suppose we have a buffer with the following content:

(a)
(b)
(c)

and the cursor is at the end of first line, immediately after "a)".
If I want to come down one line, I press down-arrow (or C-n or M-x
next-line), and cursor correctly comes at the end of second line after
"b)". But if I have "show-paren-mode" turned ON, then next-line skips
the entire second line and cursor lands at the end of 3rd line after
"c)". It may be related to
https://gna.org/bugs/?func=detailitem&item_id=5228 where C-e moves
down to next line.

In GNU Emacs 22.0.50.1 (i686-redhat-linux-gnu, GTK+ Version 2.4.14)
of 2005-06-24 on box25.private.lan
X server distributor `The X.Org Foundation', version 11.0.60802000
configured using `configure '--build=i686-redhat-linux-gnu'
'--host=i686-redhat-linux-gnu' '--target=i386-redhat-linux-gnu'
'--program-prefix=' '--prefix=/usr' '--exec-prefix=/usr'
'--bindir=/usr/bin' '--sbindir=/usr/sbin' '--sysconfdir=/etc'
'--datadir=/usr/share' '--includedir=/usr/include' '--libdir=/usr/lib'
'--libexecdir=/usr/libexec' '--localstatedir=/var'
'--sharedstatedir=/usr/com' '--mandir=/usr/share/man'
'--infodir=/usr/share/info' '--with-pop' '--with-sound' '--with-gtk'
'--without-xim' 'CFLAGS=-DMAIL_USE_LOCKF -O2 -g -pipe -m32 -march=i386
-mtune=pentium4' 'build_alias=i686-redhat-linux-gnu'
'host_alias=i686-redhat-linux-gnu'
'target_alias=i386-redhat-linux-gnu''

Important settings:
 value of $LC_ALL: nil
 value of $LC_COLLATE: nil
 value of $LC_CTYPE: nil
 value of $LC_MESSAGES: nil
 value of $LC_MONETARY: nil
 value of $LC_NUMERIC: nil
 value of $LC_TIME: nil
 value of $LANG: en_US.UTF-8
 locale-coding-system: utf-8
 default-enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
 show-paren-mode: t
 tool-bar-mode: t
 mouse-wheel-mode: t
 tooltip-mode: t
 auto-compression-mode: t
 menu-bar-mode: t
 blink-cursor-mode: t
 unify-8859-on-encoding-mode: t
 utf-translate-cjk-mode: t
 line-number-mode: t
 next-error-follow-minor-mode:  Fol

Recent input:
<help-echo> <down-mouse-1> <mouse-1> ( a ) <return>
( b ) <return> ( c ) <up> <up> M-x <up> s h o w - p
a r e n - m o d e <return> <down> <help-echo> M-x r
e p o r t - e m <tab> <return>

Recent messages:
Loading mwheel...done
(emacs -q --no-site-file)
Loading disp-table...done
Loading tool-bar...done
Loading image...done
For information about the GNU Project and its goals, type C-h C-p.
next-history-element: Beginning of history; no preceding item
Loading paren...done
Loading emacsbug...done