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M-x gnus C-x C-f TAB results in stacktrace when ffap is active

From: Benjamin Rutt
Subject: M-x gnus C-x C-f TAB results in stacktrace when ffap is active
Date: 01 May 2001 21:20:52 -0600
User-agent: Gnus/5.0808 (Gnus v5.8.8) Emacs/20.7

This bug report will be sent to the Free Software Foundation,
 not to your local site managers!!
Please write in English, because the Emacs maintainers do not have
translators to read other languages for them.

In GNU Emacs 20.7.1 (i386-redhat-linux-gnu, X toolkit)
 of Tue Jun 13 2000 on porky.devel.redhat.com
configured using `configure  --mandir=/usr/man --infodir=/usr/info 
--prefix=/usr --libexecdir=/usr/lib --sharedstatedir=/var --with-gcc --with-pop 
--with-x-toolkit i386-redhat-linux-gnu'

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

I get a stacktrace after firing up emacs, typing M-x gnus C-x C-f TAB.

Note that I have ffap-bindings in effect with the following in my

(require 'ffap)

After typing M-x gnus C-x C-f, only '~' appeared by default in the
minibuffer, at which point I hit TAB and produced the stacktrace.

If I just fire up emacs and type C-x C-f, '~/' appears in the
minibuffer.  If I C-b C-d to delete the '/', leaving just '~', and
then hit TAB to try to dupe the bug, it doesn't dupe.  So maybe the
bug is somehow connected to my having executed M-x gnus?  Of course,
this is probably only a coincidence.

I also noticed that if I comment out the ffap lines above in my
.emacs, I cannot dupe the bug.

Here is the stacktrace:
Signaling: (wrong-type-argument stringp nil)
  read-file-name-internal("~" nil nil)
  ffap-read-file-or-url-internal("~" nil nil)
* call-interactively(minibuffer-complete)
  completing-read("Find file or URL: " ffap-read-file-or-url-internal nil nil 
"~" (file-name-history))
  ffap-read-file-or-url("Find file or URL: " "")
* call-interactively(find-file-at-point)

Is the problem the fact that ffap-read-file-or-url-internal is passing
nil and nil for the DIR and ACTION arguments to

Recent input:
M-x t o g g l e - d e b u g - o n - e r r o r return 
M-x g n u s return C-x C-f tab M-x r e p o tab r t 
- e m tab return

Recent messages:
Loading gnus-topic...done
Loading debug...
Loading debug...done
Entering debugger...
 [2 times]
Making completion list...
Loading view...
Loading view...done
Loading emacsbug...
Loading emacsbug...done


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