bug#39404: `guix import gem unicode_utils' error: expecting array, got #nil

[Seth]

Hello,
trying to import this gem fails for me and another person in IRC. Here is the 
shell output:


$ guix import gem unicode_utils
Backtrace:
           5 (primitive-load "/home/seth/.config/guix/current/bin/gu…")
In guix/ui.scm:
  1824:12  4 (run-guix-command _ . _)
In guix/scripts/import.scm:
   116:11  3 (guix-import . _)
In guix/scripts/import/gem.scm:
    98:23  2 (guix-import-gem . _)
In guix/import/gem.scm:
   143:35  1 (gem->guix-package _ _ _)
In unknown file:
           0 (vector->list ())

ERROR: In procedure vector->list:
Wrong type (expecting array): #nil