bug#4398: 23.1.50; Reading dangling symbolic link gives misleading message

[Ulrich Neumerkel <ulrich@complang.tuwien.ac.at>]

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

Create a symbolic link to a nonexistent file.
M-!  ln -s /nowhere/thatfile /tmp

Try to find-file dangling link:

C-x C-f /tmp/thatfile

Now I get a request for confirmation  [Confirm]
After confirming, I get as message

File exists, but cannot be read

Expected: A more specific message like: "dangling link".

Some messages are already informative, like
"file-truename: Apparent cycle of symbolic links for /tmp/circular"

In GNU Emacs 23.1.50.2 (i686-pc-linux-gnu, X toolkit)
 of 2009-09-10 on gupu2
Windowing system distributor `The X.Org Foundation', version 11.0.10603000
configured using `configure  '--without-toolkit-scroll-bars' '--prefix' '/opt/gupu/emacs-git''

Recent input:
M-! l n SPC - s SPC / n o w h e r e / t h a t f i l 
e SPC / t m p <return> C-x C-f / t m p / t h <tab> 
<return> <return> M-x r e p o r t <tab> <return>

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
(Shell command succeeded with no output)
File exists, but cannot be read

Load-path shadows:
None found.