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Re: SRFI-1 in Scheme

From: Ludovic Courtès
Subject: Re: SRFI-1 in Scheme
Date: Tue, 20 Jul 2010 18:35:06 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (gnu/linux)


Andy Wingo <address@hidden> 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'
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) 
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)
--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?


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