Re: SRFI-1 in Scheme

[ludo@gnu.org (Ludovic Courtès)]

Hi,

Andy Wingo <wingo@pobox.com> writes:

> I would prefer not to enshrine a "regular / debug" split again though. I
> guess that's what really bothers me. It's especially egregious if you
> can't switch at runtime.

The split survived!  :-)

--8<---------------cut here---------------start------------->8---
$ guile -c 'sdf'
ERROR: In procedure catch-closure:
ERROR: Unbound variable: sdf

$ guile --debug -c 'sdf'
Backtrace:
In ice-9/boot-9.scm:
 170: 8 [catch #t #<catch-closure d5a660> ...]
In unknown file:
   ?: 7 [catch-closure]
In ice-9/boot-9.scm:
  62: 6 [call-with-prompt prompt0 ...]
In module/ice-9/eval.scm:
 389: 5 [eval # #]
In unknown file:
   ?: 4 [eval-string "sdf" #<undefined>]
In module/ice-9/eval.scm:
 356: 3 [eval #<memoized sdf> ()]
In unknown file:
   ?: 2 [memoize-variable-access! #<memoized sdf> #<directory (guile-user) b60120>]
In ice-9/boot-9.scm:
 115: 1 [#<procedure dd08c0 at ice-9/boot-9.scm:109:6 (thrown-k . args)> unbound-variable ...]
In unknown file:
   ?: 0 [catch-closure unbound-variable #f "Unbound variable: ~S" (sdf) #f]

ERROR: In procedure catch-closure:
ERROR: Unbound variable: sdf

$ guile --version
guile (GNU Guile) 1.9.11.176-1b912
--8<---------------cut here---------------end--------------->8---

Don’t get me wrong, this is not to say that we should make the split
even more acute!

I actually think that disabling automatic backtraces is much more
visible that disabling VM hooks.

What do you think?

Thanks,
Ludo’.