bug#49992: guix bug

$ guix pull

Updating channel 'guix' from Git repository at 'https://git.savannah.gnu.org/git/guix.git'...

Authenticating channel 'guix', commits 9edb3f6 to 2730ed9 (4,844 new commits)...

Building from this channel:

guix https://git.savannah.gnu.org/git/guix.git 2730ed9

substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%

module-import 2KiB 30KiB/s 00:00 [##################] 100.0%

module-import-compiled 1.8MiB 963KiB/s 00:02 [##################] 100.0%

compute-guix-derivation 1005B 169KiB/s 00:00 [##################] 100.0%

substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%

Backtrace:

15 (primitive-load "/gnu/store/yh6dqsa7j8xwx1cpkqd2w55ylhkhwd39-compute-guix-derivation")

In ice-9/eval.scm:

155:9 14 (_ _)

159:9 13 (_ #(#(#(#(#(#(#(#(#(#(#(#(#(#(#(#(#<directory (guile-u?> ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?))

In ice-9/boot-9.scm:

152:2 12 (with-fluid* _ _ _)

152:2 11 (with-fluid* _ _ _)

In ./guix/store.scm:

2108:24 10 (run-with-store #<store-connection 256.99 7efe25e2f280> _ #:guile-for-build _ #:system _ #:target _)

1945:8 9 (_ _)

In ./guix/gexp.scm:

275:18 8 (_ _)

1156:2 7 (_ _)

1022:2 6 (_ _)

868:4 5 (_ _)

In ./guix/store.scm:

1993:12 4 (_ #<store-connection 256.99 7efe25e2f280>)

1395:5 3 (map/accumulate-builds #<store-connection 256.99 7efe25e2f280> _ _)

1406:15 2 (_ #<store-connection 256.99 7efe25e2f280> _ _)

733:11 1 (process-stderr #<store-connection 256.99 7efe25e2f280> _)

In ./guix/serialization.scm:

80:6 0 (read-int #<input-output: file 10>)

./guix/serialization.scm:80:6: In procedure read-int:

ERROR:

1. &nar-error:

file: #f

port: #<input-output: file 10>

guix pull: error: You found a bug: the program '/gnu/store/yh6dqsa7j8xwx1cpkqd2w55ylhkhwd39-compute-guix-derivation'

failed to compute the derivation for Guix (version: "2730ed9a0e905c4d8b9303f1454620a648822b21"; system: "x86_64-linux";

host version: "1.3.0"; pull-version: 1).

Please report it by email to <bug-guix@gnu.org>.