Don't know where `open-network-stream' is defined

[Chris Mooooore]

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

If I describe function on open-network-stream, I see this:
  open-network-stream is a compiled Lisp function.
  (open-network-stream NAME BUFFER HOST SERVICE)

i.e. I don't see the source file that the function was defined in.

If I 'find-function' on it, I get this error:

Debugger entered--Lisp error: (error "Don't know where 
`open-network-stream' is defined")
  signal(error ("Don't know where `open-network-stream' is defined"))
  error("Don't know where `%s' is defined" open-network-stream)
  find-function-search-for-symbol(open-network-stream nil nil)
  find-function-noselect(open-network-stream)
  find-function-do-it(open-network-stream nil switch-to-buffer)
  find-function(open-network-stream)
* call-interactively(find-function)

On the IRC channel it was reported:

<mmc> I'm using ERC Version 3.0 $Revision: 1.509 $ with Emacs 21.3.1!
<mmc> here:  open-network-stream is a built-in function.

I can see source for the function in lisp/subr.el - why doesn't Emacs
know that's where it came from?


In GNU Emacs 21.3.50.1 (i386-mingw-nt5.1.2600)
 of 2003-04-20 on CHRISLAP
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: ENG
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: t

Recent input:
<help-echo> <escape> x f i n d SPC f u SPC <return>
o p e n SPC n e SPC SPC <return> <escape> x s e t SPC
v a SPC <return> d e b SPC o SPC e SPC <return> t <return>
C-h f M-p C-g C-g <escape> x M-p <return> C-g C-g <escape>
x M-p M-p <return> M-p M-p <return> C-h f o p e n SPC
n e <tab> <return> <escape> x r e p o <tab> r <tab>
<return>

Recent messages:
For information about the GNU Project and its goals, type C-h C-p.
Loading find-func...done
find-function-search-for-symbol: Don't know where `open-network-stream' 
is defined
Loading help-fns...done
Quit [4 times]
Loading debug...done
Entering debugger...
Type C-x 4 b RET to restore the other window.  C-M-v to scroll the help.
Making completion list...
Loading emacsbug...done