bug#27010: The "package-autoremove" will remove many useful packages.

[王志鹏]

When I use this feature, it will remove many useful packages.
Under what circumstances will the packages be autoremove?
This is my “report-emacs-bug” information:


From: tlmf@TLMF.i-did-not-set--mail-host-address--so-tickle-me
To: bug-gnu-emacs@gnu.org
Subject: 25.2; The package-autoremove will remove many useful packages.
--text follows this line--





In GNU Emacs 25.2.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.22.10)
 of 2017-04-22 built on juergen
Windowing system distributor 'The X.Org Foundation', version 11.0.11903000
Configured using:
 'configure --prefix=/usr --sysconfdir=/etc --libexecdir=/usr/lib
 --localstatedir=/var --with-x-toolkit=gtk3 --with-xft --with-modules
 'CFLAGS=-march=x86-64 -mtune=generic -O2 -pipe
 -fstack-protector-strong' CPPFLAGS=-D_FORTIFY_SOURCE=2
 LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro'

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS
NOTIFY ACL GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 MODULES

Important settings:
  value of $LANG: en_US.utf8
  locale-coding-system: utf-8

Major mode: ELisp

Minor modes in effect:
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  redshank-mode: t
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  ivy-mode: t
  global-company-mode: t
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  ipretty-mode: t
  global-rinari-mode: t
  global-whitespace-cleanup-mode: t
  whitespace-cleanup-mode: t
  hes-mode: t
  global-page-break-lines-mode: t
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  delete-selection-mode: t
  cua-mode: t
  show-paren-mode: t
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  global-anzu-mode: t
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  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  global-prettify-symbols-mode: t
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  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
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
Loading /home/tlmf/.emacs.d/.session...done
Desktop: 801.23ms to restore ~/*message*-20170521-210110
Wrote /home/tlmf/.emacs.d/.emacs.desktop.lock
Desktop: 1 frame, 1 buffer restored.
Desktop restored in 916.63ms
Loading /home/tlmf/.emacs.d/recentf...done
Cleaning up the recentf list...done (0 removed)
init completed in 1700.74ms
For information about GNU Emacs and the GNU system, type C-h C-a.
funcall-interactively: End of buffer

Load-path shadows:
/home/tlmf/.emacs.d/elpa-25.2/seq-2.20/seq hides 
/usr/share/emacs/25.2/lisp/emacs-lisp/seq

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Memory information:
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