bug#29579: 26.0.90; file-name-non-special does not handle operations with two args properly

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bug#29579: 26.0.90; file-name-non-special does not handle operations with two args properly

Michael Albinus

# There's no /tmp/foo nor /tmp/bar
ls /tmp/foo /tmp/bar
ls: cannot access '/tmp/foo': No such file or directory
ls: cannot access '/tmp/bar': No such file or directory

# Create /tmp/foo
mkdir /tmp/foo

# Run the test
emacs -Q -batch --eval '(copy-directory "/:/tmp/foo" "/:/tmp/bar")'
Creating directory: No such file or directory, /:/tmp/bar

# Run a similar test
emacs -Q -batch --eval '(copy-directory "/:/tmp/foo" "/ssh::/tmp/bar")'
Creating directory: No such file or directory, /ssh::/tmp/bar

The problem is, that `file-name-non-special', responsible for the first
argument "/:/tmp/foo", binds `file-name-handler-alist' to nil. The second
argument is handled literally. This happens for all operations, which
offer more than one file name argument.


In GNU Emacs 26.0.90 (build 20, x86_64-pc-linux-gnu, GTK+ Version 3.22.25)
 of 2017-12-05 built on detlef
Repository revision: 1ef1dbdbc5921ec476732954cd70e8530405f208
System Description: Ubuntu 17.10

Recent messages:
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Checking new news...done
uncompressing 23795.gz...done
Deleting article 23795 in default
uncompressing 23796.gz...done
Deleting article 23796 in default
Saving /home/albinus/.newsrc.eld...
Saving file /home/albinus/.newsrc.eld...
Wrote /home/albinus/.newsrc.eld
Saving /home/albinus/.newsrc.eld...done

Configured features:
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ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 LCMS2

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

Major mode: Group

Minor modes in effect:
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Load-path shadows:
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/home/albinus/src/elpa/packages/debbugs/debbugs-gnu hides /home/albinus/.emacs.d/elpa/debbugs-0.14/debbugs-gnu
/home/albinus/src/elpa/packages/debbugs/debbugs hides /home/albinus/.emacs.d/elpa/debbugs-0.14/debbugs
/home/albinus/src/elpa/packages/debbugs/debbugs-autoloads hides /home/albinus/.emacs.d/elpa/debbugs-0.14/debbugs-autoloads
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/home/albinus/src/elpa/packages/debbugs/debbugs-browse hides /home/albinus/.emacs.d/elpa/debbugs-0.14/debbugs-browse
/home/albinus/src/elpa/packages/tramp-theme/tramp-theme hides /home/albinus/.emacs.d/elpa/tramp-theme-0.2/tramp-theme
/home/albinus/src/elpa/packages/tramp-theme/tramp-theme-autoloads hides /home/albinus/.emacs.d/elpa/tramp-theme-0.2/tramp-theme-autoloads
/home/albinus/src/elpa/packages/tramp-theme/tramp-theme-pkg hides /home/albinus/.emacs.d/elpa/tramp-theme-0.2/tramp-theme-pkg
/home/albinus/.emacs.d/elpa/telepathy-20131209.458/telepathy hides ~/lisp/telepathy
~/src/tramp/lisp/tramp-smb hides /usr/local/src/emacs-26/lisp/net/tramp-smb
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~/src/tramp/lisp/tramp-adb hides /usr/local/src/emacs-26/lisp/net/tramp-adb
~/src/tramp/lisp/tramp-cmds hides /usr/local/src/emacs-26/lisp/net/tramp-cmds
~/src/tramp/lisp/tramp-cache hides /usr/local/src/emacs-26/lisp/net/tramp-cache
~/src/tramp/lisp/trampver hides /usr/local/src/emacs-26/lisp/net/trampver
~/src/tramp/lisp/tramp-ftp hides /usr/local/src/emacs-26/lisp/net/tramp-ftp
~/src/tramp/lisp/tramp-sh hides /usr/local/src/emacs-26/lisp/net/tramp-sh
~/src/tramp/lisp/tramp hides /usr/local/src/emacs-26/lisp/net/tramp
~/src/tramp/lisp/tramp-loaddefs hides /usr/local/src/emacs-26/lisp/net/tramp-loaddefs
~/lisp/dbus hides /usr/local/src/emacs-26/lisp/net/dbus
~/src/tramp/lisp/tramp-gvfs hides /usr/local/src/emacs-26/lisp/net/tramp-gvfs
~/src/tramp/lisp/tramp-compat hides /usr/local/src/emacs-26/lisp/net/tramp-compat

Features:
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bug#29579: 26.0.90; file-name-non-special does not handle operations with two args properly

Michael Albinus
Michael Albinus <[hidden email]> writes:

> The problem is, that `file-name-non-special', responsible for the first
> argument "/:/tmp/foo", binds `file-name-handler-alist' to nil. The second
> argument is handled literally. This happens for all operations, which
> offer more than one file name argument.

I could fix it in `file-name-non-special', committed to the emacs-26
branch. Closing the bug.

Best regards, Michael.