GNU bug report logs -
#42574
Probable (system vm trace) bug
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Your message dated Fri, 21 May 2021 20:38:33 +0200
with message-id <FDEDE69F-02D0-4C74-B389-A8C8D7822D5C <at> sarc.name>
and subject line Re: bug#42574: Probable (system vm trace) bug
has caused the debbugs.gnu.org bug report #42574,
regarding Probable (system vm trace) bug
to be marked as done.
(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)
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42574: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=42574
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Esteemed Maintainers,
I am quite positive that what I am experiencing is not quite a bug but just
some mis-step on my part. But I have been encouraged to report this as a
possible bug. Thus, here it is.
Context:
Guile version: 3.0.2 (installed using guix)
Loaded Files: simply.scm (
https://github.com/hosoe-masaki/SimplyScheme/blob/master/simply.scm)
Reverse function (referred to in the report, assumes 'simply.scm' has been
loaded):
(define (reverse wd) (if (equal? wd "") "" (word (reverse (bf wd)) (first
wd))))
;; (reverse 'asdf) -> 'fdsa
This started with my first wanting to run a (trace) of a recursive
procedure as seen in Chapter 13 of the book 'Simply Scheme' (
https://people.eecs.berkeley.edu/~bh/ssch13/convince-recur.html). I looked
for a waay to (trace) in guile, but couldn't find anything except ,trace,
which was giving a trace of everything that the function (reverse) called
from inside of it, thus making the trace 'polluted'.
I then looked around and found that a (trace) function, much like the one
being demonstrated in the book used to exist once in guile:
https://www.gnu.org/software/guile/docs/docs-1.8/guile-ref/Tracing.html and
then found that for guile3 there was something that looked similarly
promising: the (trace-calls-to-procedure) function (
https://www.gnu.org/software/guile/docs/master/guile.html/Tracing-Traps.html).
However,
> (trace-calls-to-procedure reverse)
> (reverse 'asdf)
fdsa
produced no trace. This led me to ask around IRC for some guidance
regarding it. Someone from #emacs suggested I try doing this:
http://ix.io/2suZ
When I attempted to do the same thing, however, I encountered the following
error, at the sight of which, it was recommended that I file a (possible)
bug report: https://termbin.com/6nm5
The following `script` typescript might also be of interest to the
maintainers (to be replayed using `scriptreplay`):
typescript - https://termbin.com/sx5o
timing file - https://termbin.com/73ei
(This one records the (call-with-trace) call with both #:call? #f and
without the specification).
I must confess, I don't understand a whole lot of this. All I would like to
say is that I have a feeling (trace-calls-to-procedure procedure) should
have worked like (trace) as shown in chapter 13 section 'trace' in the book
(https://people.eecs.berkeley.edu/~bh/ssch13/convince-recur.html); it just
seems 'right' by the name of it. I was expecting the trace from
(trace-call-to-procedure
reverse) (reverse 'asdf) to be basically like ,trace (reverse 'asdf) but
without the traces of all other procedures.
Please do let me know if I have left out any important details. And please
do let me know if I am doing something wrong here. I am almost quite
certain this is just a minor error on my part, rather than a bug (and I'd
really like to be able to trace those procedures).
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This has been fixed in f9f55b9ce74898d1b0a77dcc9b4aa260e5cd208d. Apologies for not noticing the earlier patch... there were a couple later duplicates.
Thanks!
This bug report was last modified 3 years and 360 days ago.
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