GNU logs - #68895, boring messages

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Subject: bug#68895: Difference between trace behavior in guix repl and guile
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--=-=-=
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Here's what's happening in a guix repl:

```
(guix-user)> ,use (guix scripts build)
(guix-user)> ,trace (guix-build "hello") ; doesn't output any trace for som=
e reason
```

And here'the same for a guile repl:

```
(guile-user)> ,use (guix scripts build)
(guile-user)> ,trace (guix-build "hello") ; however it does work
trace: |  (guix-build "hello")
trace: |  |  (_ (guix scripts) #:ensure #f)
trace: |  |  (_ #<procedure 7ff4802c5000 at ice-9/boot-9.scm:3241:7 ()>)
trace: |  |  |  (lock-mutex #<mutex 7ff487d01fc0>)
...
```

This was observed during a working group on profiling during the Guix Days.

=2D-=20
Adriel

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Adriel Dumas--Jondeau <leirda@HIDDEN>
Subject: bug#68895: Acknowledgement (Difference between trace behavior in
 guix repl and guile)
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Date: Fri, 02 Feb 2024 16:28:02 +0000

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68895: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D68895
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Message sent to bug-guix@HIDDEN:

Subject: bug#68895: `guix repl` breaks Guile REPL features
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Adriel Dumas--Jondeau <leirda@HIDDEN> writes:

> (guix-user)> ,use (guix scripts build)
> (guix-user)> ,trace (guix-build "hello") ; doesn't output any trace for some reason

It looks like this isn't the only REPL command that doesn't work in
`guix repl`. I haven't done anything close to a full investigation (I am
new to using Guile!), but many other commands simply don't work.

For example, breakpoints are not respected.
`guix repl`:
--8<---------------cut here---------------start------------->8---
scheme@(guix-user)> (define (my-f x) (+ x 1))
scheme@(guix-user)> ,break my-f
Trap 0: Breakpoint at #<procedure my-f (x)>.
scheme@(guix-user)> (my-f 2)
$1 = 3
--8<---------------cut here---------------end--------------->8---
`guile`:
--8<---------------cut here---------------start------------->8---
scheme@(guix-user)> (define (my-f x) (+ x 1))
scheme@(guix-user)> ,break my-f
Trap 0: Breakpoint at #<procedure my-f (x)>.
scheme@(guix-user)> (my-f 2)
$1 = 3
--8<---------------cut here---------------end--------------->8---

Neither are tracepoints.
`guix repl`:
--8<---------------cut here---------------start------------->8---
scheme@(guix-user)> (define (my-f x) (+ x 1))
scheme@(guix-user)> ,tracepoint my-f
Trap 0: Tracepoint at #<procedure my-f (x)>.
scheme@(guix-user)> (my-f 2)
$1 = 3
--8<---------------cut here---------------end--------------->8---
`guile`:
--8<---------------cut here---------------start------------->8---
scheme@(guile-user)> (define (my-f x) (+ x 1))
scheme@(guile-user)> ,tracepoint my-f
Trap 0: Tracepoint at #<procedure my-f (x)>.
scheme@(guile-user)> (my-f 2)
Trap 0: (my-f 2)
Trap 0: 3
$1 = 3
--8<---------------cut here---------------end--------------->8---

Message sent to bug-guix@HIDDEN:

Subject: bug#68895: `guix repl` breaks Guile REPL features
Resent-From: Suhail Singh <suhailsingh247@HIDDEN>
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To: 45mg <45mg.writes@HIDDEN>
Cc: Guix-devel mailing list <guix-devel@HIDDEN>, 68895 <at> debbugs.gnu.org, Adriel Dumas--Jondeau <leirda@HIDDEN>
From: Suhail Singh <suhailsingh247@HIDDEN>
In-Reply-To: <87zfk6h1wx.fsf@HIDDEN> (45mg.writes@HIDDEN's message of
 "Sat, 04 Jan 2025 13:25:18 -0500")
References: <8734uaq1cb.fsf@HIDDEN> <87zfk6h1wx.fsf@HIDDEN>
Date: Wed, 08 Jan 2025 10:21:45 -0500
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45mg <45mg.writes@HIDDEN> writes:

> It looks like this isn't the only REPL command that doesn't work in
> `guix repl`. I haven't done anything close to a full investigation (I am
> new to using Guile!), but many other commands simply don't work.

Thank you for your investigation.  I am cc-ing guix-devel in case they
have insight regarding these.

-- 
Suhail

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Suhail Singh <suhailsingh247@HIDDEN> writes:

>> It looks like this isn't the only REPL command that doesn't work in
>> `guix repl`. I haven't done anything close to a full investigation (I am
>> new to using Guile!), but many other commands simply don't work.
>
> Thank you for your investigation.  I am cc-ing guix-devel in case they
> have insight regarding these.

Whoops, sent too quickly.  Current (probably inexhaustive) list:

- trace
- tracepoint
- break

-- 
Suhail

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