bug#55032: Bug from guix pull

[Yuxuan 'fishy' Wang]

This is the output from guix pull:

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Updating channel 'guix' from Git repository at 
'https://git.savannah.gnu.org/git/guix.git'...
Authenticating channel 'guix', commits 9edb3f6 to ffb616b (33 new commits)...
Building from this channel:
  guix      https://git.savannah.gnu.org/git/guix.git   ffb616b
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
 config.scm  501B                                                               
                                                                                
                        6KiB/s 00:00 [##################] 100.0%
 git.scm  101B                                                                  
                                                                                
                        6KiB/s 00:00 [##################] 100.0%
 hash.scm  132B                                                                 
                                                                                
                       40KiB/s 00:00 [##################] 100.0%
 module-import  2KiB                                                            
                                                                                
                       21KiB/s 00:00 [##################] 100.0%
 module-import-compiled                                                         
                                                                                
                             972KiB/s 00:02 | 1.5MiB transferred
 compute-guix-derivation  1007B                                                 
                                                                                
                      151KiB/s 00:00 [##################] 100.0%
Computing Guix derivation for 'x86_64-linux'... \Backtrace:
          17 (primitive-load 
"/gnu/store/zgzaz6c723pjkykiqnpnqr9rmylf69dq-compute-guix-derivation")
In ice-9/eval.scm:
    155:9 16 (_ _)
    159:9 15 (_ #(#(#(#(#(#(#(#(#(#(#(#(#(#(#(#(#<directory (guile-u?> ?) ?) ?) 
?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?))
In ice-9/boot-9.scm:
    152:2 14 (with-fluid* _ _ _)
    152:2 13 (with-fluid* _ _ _)
In ./guix/store.scm:
  2129:24 12 (run-with-store #<store-connection 256.99 7f48d025d140> 
#<procedure 7f48c0328aa0 at ./guix/self.scm:12?> ?)
   1966:8 11 (_ #<store-connection 256.99 7f48d025d140>)
In ./guix/gexp.scm:
   299:22 10 (_ #<store-connection 256.99 7f48d025d140>)
   1180:2  9 (_ #<store-connection 256.99 7f48b8ed2b90>)
   1046:2  8 (_ #<store-connection 256.99 7f48b8ed2b90>)
    892:4  7 (_ #<store-connection 256.99 7f48b8ed2b90>)
In ./guix/store.scm:
  2014:12  6 (_ #<store-connection 256.99 7f48b8ed2b90>)
   1406:5  5 (map/accumulate-builds #<store-connection 256.99 7f48b8ed2b90> 
#<procedure 7f48c6e1b7c0 at ./guix/stor?> ?)
  1421:15  4 (_ #<store-connection 256.99 7f48b8ed2b90> 
("/gnu/store/bxj1khnh32gwzc4ly1nrrddk933ns55k-guile-ssh-?" ?) ?)
  1421:15  3 (loop #f)
   733:11  2 (process-stderr #<store-connection 256.99 7f48b8ed2b90> _)
In ./guix/serialization.scm:
   102:11  1 (read-int #<input-output: file 10>)
     80:6  0 (get-bytevector-n* #<input-output: file 10> 8)

./guix/serialization.scm:80:6: In procedure get-bytevector-n*:
ERROR:
  1. &nar-error:
      file: #f
      port: #<input-output: file 10>
guix pull: error: You found a bug: the program 
'/gnu/store/zgzaz6c723pjkykiqnpnqr9rmylf69dq-compute-guix-derivation'
failed to compute the derivation for Guix (version: 
"ffb616b69dced25b840f2e5178062072d89623eb"; system: "x86_64-linux";
host version: "6b677f4299f38ea70e1852388086ee95c2c48622"; pull-version: 1).
Please report the COMPLETE output above by email to <bug-guix@gnu.org>.
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Please let me know if any more information is useful.