bug#28144: bug#31294: Failed building dependencies for guix.

[Ludovic Courtès]

address@hidden (Ludovic Courtès) skribis:

> It confirms that the bad code creates a <gexp> structure with the empty
> list as its ‘modules’ field instead of '((guix build utils)).
>
> That’s clearly a Guile bug.

This miscompilation issue involves “syntax parameters” (because
‘with-imported-modules’ uses a syntax parameter), and it very likely has
to do with the thread-safety issue I describe here:
<https://debbugs.gnu.org/cgi/bugreport.cgi?bug=27476#74>.

Ludo’.