bug#56681: Guix error report

[Kevin Morris]

Good afternoon! I received this error when trying to run "guix pull" today, and 
the report told me to send the output to this address.

Computing Guix derivation for 'x86_64-linux'... -Backtrace:
          13 (primitive-load 
"/gnu/store/lm4i0rd29gxfahw904gndpwpii7q2qj7-compute-guix-derivation")
In ice-9/eval.scm:
    155:9 12 (_ _)
    159:9 11 (_ #(#(#(#(#(#(#(#(#(#(#(#(#(#(#(#(#<directory (guile-u?> ?) ?) ?) 
?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?))
In ice-9/boot-9.scm:
    152:2 10 (with-fluid* _ _ _)
    152:2  9 (with-fluid* _ _ _)
In ./guix/store.scm:
  2168:24  8 (run-with-store #<store-connection 256.99 7fc09b8f5190> _ 
#:guile-for-build _ #:system _ #:target _)
   1996:8  7 (_ _)
In ./guix/gexp.scm:
   300:22  6 (_ _)
   1181:2  5 (_ _)
   1047:2  4 (_ _)
    893:4  3 (_ _)
In ./guix/store.scm:
  2053:12  2 (_ #<store-connection 256.99 7fc09b7ecdc0>)
   1401:5  1 (map/accumulate-builds #<store-connection 256.99 7fc09b7ecdc0> 
#<procedure 7fc0999a6210 at ./guix/stor?> ?)
  1417:15  0 (_ #<store-connection 256.99 7fc09b7ecdc0> _ _)

./guix/store.scm:1417:15: ERROR:
  1. &store-protocol-error:
      message: 
"`/gnu/store/0iii8i1lc4wg3wccs1db7y7d8lg80i04-guix-1.3.0/bin/guix substitute' 
died unexpectedly"
      status: 1
guix pull: error: You found a bug: the program 
'/gnu/store/lm4i0rd29gxfahw904gndpwpii7q2qj7-compute-guix-derivation'
failed to compute the derivation for Guix (version: 
"3f171587bc6a47bb056f3e699e17e05f5832aea5"; system: "x86_64-linux";
host version: "1.3.0"; pull-version: 1).
Please report the COMPLETE output above by email to <bug-guix@gnu.org>.