bug#36490: 26.1; directory-files-recursively breaks when it encounters a directory named "~"

[Erik Hahn <erik_hahn@gmx.de>]

Call (directory-files-recursively DIR ".*") where DIR contains a
subdirectory named "~" but is not the parent of your home directory. The
function will recurse into your home directory. This is probably because
(expand-file-name "~" ...) returns the home directory.


In GNU Emacs 26.1 (build 1, x86_64-pc-linux-gnu, X toolkit)
 of 2018-11-03 built on p5
Windowing system distributor 'The X.Org Foundation', version 11.0.12003000
System Description:	Gentoo Base System release 2.6

Recent messages:
Configured using:
 'configure --prefix=/usr --build=x86_64-pc-linux-gnu
 --host=x86_64-pc-linux-gnu --mandir=/usr/share/man
 --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc
 --localstatedir=/var/lib --disable-silent-rules
 --docdir=/usr/share/doc/emacs-26.1-r3
 --htmldir=/usr/share/doc/emacs-26.1-r3/html --libdir=/usr/lib64
 --program-suffix=-emacs-26 --infodir=/usr/share/info/emacs-26
 --localstatedir=/var
 --enable-locallisppath=/etc/emacs:/usr/share/emacs/site-lisp
 --without-compress-install --without-hesiod --without-pop
 --with-file-notification=inotify --enable-acl --with-dbus
 --without-modules --without-gameuser --with-gpm --without-kerberos
 --without-kerberos5 --without-lcms2 --with-xml2 --without-mailutils
 --without-selinux --with-gnutls --with-libsystemd --with-threads
 --without-wide-int --with-zlib --with-sound=alsa --with-x --without-ns
 --without-gconf --without-gsettings --without-toolkit-scroll-bars
 --with-gif --with-jpeg --with-png --with-rsvg --with-tiff --with-xpm
 --without-imagemagick --without-xft --without-cairo --without-libotf
 --without-m17n-flt --with-x-toolkit=lucid --with-xaw3d 'CFLAGS=-O2
 -pipe -march=native' CPPFLAGS= 'LDFLAGS=-Wl,-O1 -Wl,--as-needed''

Configured features:
XAW3D XPM JPEG TIFF GIF PNG RSVG SOUND GPM DBUS NOTIFY ACL GNUTLS
LIBXML2 ZLIB LUCID X11 THREADS LIBSYSTEMD

Important settings:
  value of $LC_MONETARY: en_US.UTF-8
  value of $LC_NUMERIC: en_US.UTF-8
  value of $LC_TIME: en_GB.UTF-8
  value of $LANG: en_GB.utf8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction