Re: Backtraces in Guile 2.0

[Mike Gran <spk121@yahoo.com>]

> From:Andy Wingo <wingo@pobox.com>
> In any case it seems that symbol1.scm.go tail-calls symbol->string, so
> we are left without source info.  Bummer.  We could improve this by
> keeping a ring buffer of previous frames, like JRM suggests in
> http://funcall.blogspot.com/2009/05/you-knew-id-say-something-part-iv.html.

So, the specific line on which the error occurred will always read
"in unknown file" because source data is a property of procedures.  And,
when procedure A tail-calls procedure B, the backtrace may only
display the information of the procedure A.  Right?

Thus, if I understand correctly, the closest I can get to getting source
info for this trivial case would be to change the script to

  (symbol->string "HELLO")
  #t

Adding a #t so it can't be tail-called.  Then I get

In unknown file:
   ?: 2 [load-compiled/vm "/home/Mike/.cache/guile/ccache/2.0-LE-4-2.0/home/Mike/tmp.scm.go"]
In /home/Mike/tmp.scm:
   1: 1 [#<procedure 13fa550 ()>]
In unknown file:
   ?: 0 [symbol->string "STRING"]
ERROR: In procedure symbol->string:

Thanks,

-Mike