bug#52362: [PATCH v3] guix: import: go: Use correct tag for go module in subdirectory.

[Nicolas Goaziou <mail@nicolasgoaziou.fr>]

Hello,

I tested v3 of this change, which looks great.

Unfortunately, when running

  ./pre-inst-env guix import go --recursive rclone

I get the following backtrace:

--8<---------------cut here---------------start------------->8---
following redirection to `https://github.com/qingstor/qingstor-sdk-go?go-get=1'...
Backtrace:
In ice-9/boot-9.scm:
  1752:10 19 (with-exception-handler _ _ #:unwind? _ # _)
In guix/scripts/import/go.scm:
   114:22 18 (_)
In guix/import/utils.scm:
   509:23 17 (recursive-import _ #:repo->guix-package _ #:guix-name _ …)
In srfi/srfi-1.scm:
   586:29 16 (map1 _)
   586:29 15 (map1 _)
   586:29 14 (map1 _)
   586:29 13 (map1 _)
   586:29 12 (map1 _)
   586:29 11 (map1 _)
   586:17 10 (map1 (("github.com/yunify/qingstor-sdk-go/v3" #f) (…) …))
In guix/import/utils.scm:
   497:33  9 (lookup-node "github.com/yunify/qingstor-sdk-go/v3" #f)
In guix/memoization.scm:
     98:0  8 (mproc "github.com/yunify/qingstor-sdk-go/v3" #:version …)
In unknown file:
           7 (_ #<procedure 7f09be40e0c0 at guix/memoization.scm:17…> …)
           6 (_ #<procedure 7f09be40e080 at ice-9/eval.scm:330:13 ()> …)
In ice-9/boot-9.scm:
    724:2  5 (call-with-prompt _ _ #<procedure 7f09be413e20 at ice-9…>)
  1752:10  4 (with-exception-handler _ _ #:unwind? _ # _)
In ice-9/eval.scm:
   293:34  3 (_ #(#(#(#(#(#(#(#(#(#(#(#) …) …) …) …) …) …) …) …) …) …))
In unknown file:
           2 (substring "github.com/yunify/qingstor-sdk-go" 35 #<und…>)
In ice-9/boot-9.scm:
  1685:16  1 (raise-exception _ #:continuable? _)
  1683:16  0 (raise-exception _ #:continuable? _)

ice-9/boot-9.scm:1683:16: In procedure raise-exception:
Value out of range 0 to< 33: 35
--8<---------------cut here---------------end--------------->8---

Do you know why it is failing like this?

Regards,
-- 
Nicolas Goaziou