GNU bug report logs - #48412
tracepointing and backtracing in the REPL sometime hang

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Adriano Peluso <randomlooser <at> riseup.net>
To: bug-guile <at> gnu.org
Subject: tracepointing and backtracing in the REPL sometime hang
Date: Fri, 14 May 2021 09:02:14 +0200

in Guile 3.0.5 installed with Guix (as a package manager on top of
Ubuntu)

In a file I have this simple procedure

(define (f n)
  (if (< n 3)
      n
      (+ (f (- n 1))
	 (* 2 (f (- n 2)))
	 (* 3 (f (- n 3))))))


it's a variation of the one calculating the Fibonacci numbers, from an
exercise of the SICP (1.11)

At the REPL, I load the file normally

scheme@(guile-user)> (load "1.11.scm")

Now, I can trace this procedure

scheme@(guile-user)> ,trace (f 4)
trace: |  (f 4)
trace: |  |  (f 3)
trace: |  |  |  (f 2)
trace: |  |  |  2
trace: |  |  |  (f 1)
trace: |  |  |  1
trace: |  |  |  (f 0)
trace: |  |  |  0
trace: |  |  4
trace: |  |  (f 2)
trace: |  |  2
trace: |  |  (f 1)
trace: |  |  1
trace: |  11


But I can't tracepoint it

scheme@(guile-user)> ,tp f
Trap 0: Tracepoint at #<procedure f (n)>.
scheme@(guile-user)> (f 4)
Trap 0: (f 4)
Trap 0: |  (f 3)
Trap 0: |  |  (f 2)
ice-9/boot-9.scm:1669:16: In procedure raise-exception:
Wrong number of arguments to #<procedure return-handler (frame depth
values)>

Entering a new prompt.  Type `,bt' for a backtrace or `,q' to continue.
scheme@(guile-user) [1]> 


and now I can't even print a backtrace

scheme@(guile-user)> (f 4)
Trap 0: (f 4)
Trap 0: |  (f 3)
Trap 0: |  |  (f 2)
ice-9/boot-9.scm:1669:16: In procedure raise-exception:
Wrong number of arguments to #<procedure return-handler (frame depth
values)>

Entering a new prompt.  Type `,bt' for a backtrace or `,q' to continue.
scheme@(guile-user) [1]> ,bt
In /home/adriano/Documenti/SICP/1.11.scm:
     64:9  4 (f 4)
     64:9  3 (f 3)
While executing meta-command:
In procedure frame-local-ref: Argument 2 out of range: 1
scheme@(guile-user) [1]> 


and now I can't even trace no more

scheme@(guile-user) [1]> ,q
scheme@(guile-user)> ,trace (f 4)
While executing meta-command:
Wrong number of arguments to #<procedure return-handler (frame depth
values)>
scheme@(guile-user)> 

Message #8 received at 48412 <at> debbugs.gnu.org (full text, mbox):

From: Adriano Peluso <randomlooser <at> riseup.net>
To: 48412 <at> debbugs.gnu.org
Subject: duplicate ?
Date: Fri, 14 May 2021 11:13:52 +0200

I just noticed someone sent a patch that seems relevant here

It's in #43102

https://debbugs.gnu.org/cgi/bugreport.cgi?bug=43102

Message #11 received at 48412 <at> debbugs.gnu.org (full text, mbox):

From: Adriano Peluso <randomlooser <at> riseup.net>
To: 48412 <at> debbugs.gnu.org
Subject: Re: duplicate ?
Date: Sun, 16 May 2021 09:09:58 +0200

Il giorno ven, 14/05/2021 alle 11.13 +0200, Adriano Peluso ha scritto:
> I just noticed someone sent a patch that seems relevant here
> 
> It's in #43102
> 
> https://debbugs.gnu.org/cgi/bugreport.cgi?bug=43102

I applied this patch

It does solve the issue, it seems

Now I can tracepoint my procedure

Message #16 received at 48412-done <at> debbugs.gnu.org (full text, mbox):

From: lloda <lloda <at> sarc.name>
To: randomlooser <at> riseup.net
Cc: 43102-done <at> debbugs.gnu.org, 48412-done <at> debbugs.gnu.org
Subject: Re: bug#48412: duplicate ?
Date: Wed, 19 May 2021 21:34:26 +0200

Patch applied in f9f55b9ce74898d1b0a77dcc9b4aa260e5cd208d. Thanks!


> On 16 May 2021, at 09:09, Adriano Peluso <randomlooser <at> riseup.net> wrote:
> 
> Il giorno ven, 14/05/2021 alle 11.13 +0200, Adriano Peluso ha scritto:
>> I just noticed someone sent a patch that seems relevant here
>> 
>> It's in #43102
>> 
>> https://debbugs.gnu.org/cgi/bugreport.cgi?bug=43102
> 
> I applied this patch
> 
> It does solve the issue, it seems
> 
> Now I can tracepoint my procedure
> 
> 
> 
> 

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