bug#12423: 24.2; call-process doesn't take a default-directory into account

[Dmitry Neverov]

Hi!

It seems like call-process doesn't take default-directory into account
although documentation says it should. The following always lists files
in the root, not in the /home:

(let ((default-directory "/home"))
  (call-process "ls" nil t t))

In GNU Emacs 24.2.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.10)
 of 2012-09-03 on unit-424
Windowing system distributor `The X.Org Foundation', version 11.0.11103000
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: en_US.UTF-8
  value of $LC_NUMERIC: en_US.UTF-8
  value of $LC_TIME: en_US.UTF-8
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

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  erc-match-mode: t
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Recent input:
SPC i n SPC t h e SPC r o o t , SPC n o t SPC i t n
C-h C-h n SPC t h e SPC h o m e M-b / C-e : C-n C-n
C-n C-e <return> C-SPC M-> C-w C-l M-< M-f C-f C-f
d m i t r y . n e v e r o v @ g m a i l . c o m C-k
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n
C-n C-n C-n C-n C-n C-n <return> C-c C-c y s m p t
<return> C-M-h m a i l SPC c l i e n t <return> C-x
C-o C-x o C-x b <return> C-x o C-x b m a i l C-s <return>
C-c C-c y y C-x b <return> C-x b m a i l C-s <return>
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n
C-n C-n C-n C-n C-n C-n C-n C-n C-p C-p C-p C-p C-p
C-p C-p C-p C-p C-p C-p C-p C-p C-e M-b M-b M-b M-b
a SPC C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n
C-n C-n C-n C-c C-g C-u C-c C-c y y C-n C-n C-n C-n
C-n C-p C-x k <return> C-x b <return> C-x b m a i l
<return> C-x b m a i l <return> C-n M-b C-SPC C-e M-w
C-w C-/ C-SPC C-a C-f C-g C-n C-n C-n C-n C-n C-n C-n
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n
C-n C-n C-n C-n C-SPC M-< M-w C-x RET M-p <return>
C-g C-n C-n M-f M-f C-f C-f C-f C-f C-SPC C-e M-w C-x
o RET C-x o C-x RET M-p <return>

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