bug#38050: another instance

[Attila Lendvai]

$ make check-system
[..]
substitute: updating substitutes from 'http://10.0.8.103:9999'... 100.0%
substitute: updating substitutes from 'https://substitutes.nonguix.org'... 
100.0%
substitute: updating substitutes from 'https://bordeaux.guix.gnu.org'... 100.0%
downloading from 
https://ci.guix.gnu.org/nar/sifkzg6ab707f389k9d7ixwkz2s8k6mk-docker-pack.tar.gz 
...
 docker-pack.tar.gz  38.2MiB                                                    
                                    4.40GiB/s 00:00 ▕█████▉            ▏  
32.8%Backtrace:
In guix/store.scm:
   1330:8 19 (call-with-build-handler _ _)
   1330:8 18 (call-with-build-handler _ _)
   1330:8 17 (call-with-build-handler _ _)
   1330:8 16 (call-with-build-handler _ _)
   1330:8 15 (call-with-build-handler _ _)
   1330:8 14 (call-with-build-handler _ _)
   1330:8 13 (call-with-build-handler _ _)
   1330:8 12 (call-with-build-handler _ _)
   1330:8 11 (call-with-build-handler _ _)
   1330:8 10 (call-with-build-handler _ _)
   1330:8  9 (call-with-build-handler #<procedure 7fc4897a16c0 at 
guix/ui.scm:1236:2 (continue store things mode)> _)
In guix/scripts/build.scm:
   802:27  8 (_)
In guix/store.scm:
  1449:15  7 (_ #<store-connection 256.100 7fc48ef26910> _ _)
   772:14  6 (process-stderr _ _)
In unknown file:
           5 (display "@ substituter-succeeded 
/gnu/store/sifkzg6ab707f389k9d7ixwkz2s8k6mk-docker-pack.tar.gz\n" #<output: 
string 7fc4897fa0e0>)
In guix/status.scm:
   757:16  4 (write! _ _ _)
    670:6  3 (_ (download-progress 
"/gnu/store/sifkzg6ab707f389k9d7ixwkz2s8k6mk-docker-pack.tar.gz" 
"https://ci.guix.gnu.org/nar/sifkzg6ab707f389k9d7ix…"; …) …)
In guix/progress.scm:
   255:17  2 (display-download-progress "sifkzg6ab707f389k9d7ixwkz2s8k6m@" _ 
#:tty? _ #:start-time _ #:transferred _ #:log-port _)
In ice-9/boot-9.scm:
  1685:16  1 (raise-exception _ #:continuable? _)
  1685:16  0 (raise-exception _ #:continuable? _)

ice-9/boot-9.scm:1685:16: In procedure raise-exception:
In procedure =: Wrong type argument in position 1: #f
make: *** [Makefile:7285: check-system] Error 1