(replace-regexp-in-string ...) gets a weird result.

[yu jie]

--text follows this line--

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Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

 

==========================================================

Test Cases:

----------------------------------------------------------------------------------

 (defun test (f)
  (prin1
   (replace-regexp-in-string
   "%[a-zA-Z0-9][a-zA-Z0-9]"
   (lambda (arg)
     (let ((str (make-string 1 0)))
       (aset str 0 (string-to-number (substring arg 1) 16))
       str))
   f nil t)))

  (test "%C8%EB")  ;;case 1
  (test "%c8%eb")   ;;case 2

-------------------------------------------------------------------------------------

 

in each test case, the lambda function will be called twice and the return value is in the following table:

-------------------------------------

              %C8       %EB

case 1    "\310"      "\353"

case 2    "\310"      "\353"

--------------------------------------

both get the same result, but the return value of the (replace-regexp-in-string ...) is different:

--------------------------------------

case1     "\310\313"

case2     "\310\353"

--------------------------------------

 

=================================================================== 

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In GNU Emacs 23.0.0.1 (i386-mingw-nt5.1.2600)
 of 2006-12-22 on MACROSS-GG9FRPF
X server distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc ( 3.2)'

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: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: ENU
  value of $XMODIFIERS: nil
  locale-coding-system: cp936
  default-enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  show-paren-mode: t
  encoded-kbd-mode: t
  tooltip-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
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <menu-bar> <help-menu> <re
port-emacs-bug>

Recent messages:
(D:\ntemacs23\bin\emacs.exe)
Loading encoded-kb...done
Toggling tool-bar-mode off; better pass an explicit argument.
Loading paren...done
Loading edmacro...done
Loading cl-macs...done
For information about the GNU Project and its goals, type C-h C-p.
Loading emacsbug...
Loading regexp-opt...done
Loading emacsbug...done