bug#48496: Guix reconfigure fails to switch to new system

["Ludovic Courtès" <ludo@gnu.org>]

Hi Simon & Tobias,

Ludovic Courtès <ludo@gnu.org> skribis:

> Tobias Geerinckx-Rice <me@tobias.gr> skribis:
>
>> Simon Streit 写道：
>>> ice-9/boot-9.scm:1685:16: In procedure raise-exception:
>>> no code for module (system repl error-handling)
>>
>> Thank you for reporting this.  With commit
>> 5fa46ca96da90ec19e32cc4d726f099d0979d60b on master, the system 
>> tests that failed for me with this error no longer do.
>
> What system tests were failing?
>
> At first sight I don’t see how a67c00f4f7ee0a70fce14a7e1907cce332c85813
> led to this:
>
> activating system...
> Backtrace:
> In ice-9/boot-9.scm:
>   3422:24 19 (_)
>    222:29 18 (map1 (((gnu system accounts)) ((gnu build accounts)) …))
>    222:29 17 (map1 (((gnu build accounts)) ((gnu build #)) ((# …)) …))
>    222:17 16 (map1 (((gnu build linux-boot)) ((guix build utils)) # …))
>   3326:17 15 (resolve-interface (gnu build linux-boot) #:select _ # _ …)
> In ice-9/threads.scm:
>     390:8 14 (_ _)
> In ice-9/boot-9.scm:
>   3252:13 13 (_)
> In ice-9/threads.scm:
>     390:8 12 (_ _)
> In ice-9/boot-9.scm:
>   3536:20 11 (_)
>    2835:4 10 (save-module-excursion #<procedure 7f9a73ee5b70 at ice-…>)
>   3556:26  9 (_)
> In unknown file:
>            8 (primitive-load-path "gnu/build/linux-boot" #<procedure…>)
> In gnu/build/linux-boot.scm:
>      22:0  7 (_)
> In ice-9/boot-9.scm:
>    3409:4  6 (define-module* _ #:filename _ #:pure _ #:version _ # _ …)
>   3422:24  5 (_)
>    222:29  4 (map1 (((rnrs io ports)) ((system repl #)) ((srfi #)) …))
>    222:17  3 (map1 (((system repl error-handling)) ((srfi srfi-1)) …))
>    3329:6  2 (resolve-interface (system repl error-handling) #:select …)
>   1685:16  1 (raise-exception _ #:continuable? _)
>   1685:16  0 (raise-exception _ #:continuable? _)
>
> ice-9/boot-9.scm:1685:16: In procedure raise-exception:
> no code for module (system repl error-handling)

I’ve tried several system tests and manually running a system in a VM,
with a67c00f4f7ee0a70fce14a7e1907cce332c85813 reinstated, and cannot
reproduce the issue.

Do you know of a way to reproduce it?

The IRC log <https://logs.guix.gnu.org/guix/2021-05-18.log> suggests
that a couple of people experienced the issue on that day, but pastes
are no longer accessible.

TIA!

Ludo’.