bug#20569: 24.5; Vertical scroll bar is shorter than frame in info buffer

[N. Jackson]

Recipe:

emacs -Q
M-x i n f o RET

Expected Result:

The vertical scroll bar extends over the entire frame height, "blending"
into the menu bar at the top right.

Observed Result:

The vertical scroll bar does not extend over the entire frame height.
There is a gap at the top, below the menu bar.

The top row of the info buffer, the one that contains the navigation
information, seems to extend too far to the right (although it does not
in fact seem to overlie (in the z-order as it were) the scroll bar,
rather the scroll bar appears to be drawn with its top below (in
y-coordinate) the top row of the info buffer.

The problem is more pronounced with a dark Emacs theme. (I use
Wheatgrass.)

I'm guessing the problem also affects other modes that use the top row
of the buffer in a similar way.


In GNU Emacs 24.5.1 (x86_64-redhat-linux-gnu, GTK+ Version 3.14.12)
 of 2015-04-17 on buildvm-04.phx2.fedoraproject.org
Windowing system distributor `Fedora Project', version 11.0.11603000
System Description:     Fedora release 21 (Twenty One)

Configured using:
 `configure --build=x86_64-redhat-linux-gnu
 --host=x86_64-redhat-linux-gnu --program-prefix=
 --disable-dependency-tracking --prefix=/usr --exec-prefix=/usr
 --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc
 --datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib64
 --libexecdir=/usr/libexec --localstatedir=/var
 --sharedstatedir=/var/lib --mandir=/usr/share/man
 --infodir=/usr/share/info --with-dbus --with-gif --with-jpeg --with-png
 --with-rsvg --with-tiff --with-xft --with-xpm --with-x-toolkit=gtk3
 --with-gpm=no build_alias=x86_64-redhat-linux-gnu
 host_alias=x86_64-redhat-linux-gnu 'CFLAGS=-DMAIL_USE_LOCKF -O2 -g
 -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2
 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4
 -grecord-gcc-switches -m64 -mtune=generic' 'LDFLAGS=-Wl,-z,relro ''

Important settings:
  value of $LC_MONETARY: en_DK.utf8
  value of $LC_NUMERIC: en_DK.utf8
  value of $LC_TIME: en_DK.utf8
  value of $LANG: en_CA.utf8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Group

Minor modes in effect:
  gnus-undo-mode: t
  recentf-mode: t
  display-battery-mode: t
  display-time-mode: t
  delete-selection-mode: t
  show-paren-mode: t
  savehist-mode: t
  iswitchb-mode: t
  electric-pair-mode: t
  desktop-save-mode: t
  cua-mode: t
  tooltip-mode: t
  electric-indent-mode: t
  mouse-wheel-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
  buffer-read-only: t
  size-indication-mode: t
  column-number-mode: t
  line-number-mode: t
  global-visual-line-mode: t
  visual-line-mode: t
  transient-mark-mode: t

Recent messages:
Opening connection to localhost via tls...
Opening connection to localhost...done
Opening nnimap server on Local Dovecot Mailstore...done
2 new newsgroups have arrived
Checking new news...
nnimap read 48k from localhost (initial sync of 1 group; please wait)
Reading active file from archive via nnfolder...done
Checking new news...done
GNU Emacs 24.5.1 (x86_64-redhat-linux-gnu, GTK+ Version 3.14.12) of 2015-04-17 
on buildvm-04.phx2.fedoraproject.org
previous-buffer: Cannot switch buffers in minibuffer window

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