Info: Console Vs GUI difference?

["T.V. Raman" <tv.raman.tv@gmail.com>]

Found the backtrace:-)

I  see that redisplay is triggering the bug -- but only under X.

Once user-error has been triggered once in info, then the signal
is raised after * every user command * -- see output below from
the Messages buffer.
backtrace()
  emacspeak-speak-error-message(user-error "Node has no Up")
  ad-Advice-signal(#<subr signal> user-error ("Node has no Up"))
  apply(ad-Advice-signal #<subr signal> (user-error ("Node has no Up")))
  signal(user-error ("Node has no Up"))
  user-error("Node has no %s" "Up")
  #[(name &optional errorname) "Ä\x18Šebˆ`\x19ÅyˆÆ
ÇÈ Q	Ä#ƒ\x1d\0ÉÅ!‚.\0\vÄ=?….\0ÊËÌ\v†,\0
!\"+‡" [case-fold-search bound name errorname t 1 re-search-backward
":" Info-following-node-name-re match-string-no-properties user-error
"Node has no %s" capitalize] 4
("/usr/local/share/emacs/24.3.50/lisp/info.elc" . 56390)]("up" nil)
  ad-Advice-Info-extract-pointer(#[(name &optional errorname) "Ä\x18Šebˆ`\x19ÅyˆÆ
ÇÈ Q	Ä#ƒ\x1d\0ÉÅ!‚.\0\vÄ=?….\0ÊËÌ\v†,\0
!\"+‡" [case-fold-search bound name errorname t 1 re-search-backward
":" Info-following-node-name-re match-string-no-properties user-error
"Node has no %s" capitalize] 4
("/usr/local/share/emacs/24.3.50/lisp/info.elc" . 56390)] "up")
  apply(ad-Advice-Info-extract-pointer #[(name &optional errorname)
"Ä\x18Šebˆ`\x19ÅyˆÆ
ÇÈ Q	Ä#ƒ\x1d\0ÉÅ!‚.\0\vÄ=?….\0ÊËÌ\v†,\0
!\"+‡" [case-fold-search bound name errorname t 1 re-search-backward
":" Info-following-node-name-re match-string-no-properties user-error
"Node has no %s" capitalize] 4
("/usr/local/share/emacs/24.3.50/lisp/info.elc" . 56390)] "up")
  Info-extract-pointer("up")
  Info-up()
  call-interactively(Info-up nil nil)
  command-execute(Info-up)

On 11/1/13, Stefan Monnier <monnier@iro.umontreal.ca> wrote:
>> I just added (backtrace) at the top of the advice form.
>
> Check the docstring of `backtrace' ;-)
>
> It doesn't display the backtrace, it just prints it somewhere.
> Typically, you make it print into some temp buffer which you can consult
> manually later on.
>
>
>         Stefan
>