bug#23030: Guix commands broken

[Andreas Enge <andreas@enge.fr>]

Hello,

sorry for the vague title; it looks as if one of the recent commits broke the
daemon for me.

$ ./pre-inst-env guix build font-forge --no-substitutes
substitute: Backtrace:
substitute: In ice-9/boot-9.scm:
substitute:   63: 19 [call-with-prompt prompt0 ...]
substitute: In ice-9/eval.scm:
substitute:  432: 18 [eval # #]
substitute: In ice-9/boot-9.scm:
substitute: 2401: 17 [save-module-excursion #<procedure 1d3f940 at ice-9/boot-9.scm:4045:3 ()>]
substitute: 4050: 16 [#<procedure 1d3f940 at ice-9/boot-9.scm:4045:3 ()>]
substitute: 1724: 15 [%start-stack load-stack ...]
substitute: 1729: 14 [#<procedure 1d57ea0 ()>]
substitute: In unknown file:
substitute:    ?: 13 [primitive-load "/gnu/store/3lg5c1nidbj0kjdz5b63hn3vp29kzf0s-guix-0.9.0.c3f29bc/bin/.guix-real"]
substitute: In guix/ui.scm:
substitute: 1175: 12 [run-guix-command substitute "--query"]
substitute: In ice-9/boot-9.scm:
substitute:  157: 11 [catch getaddrinfo-error ...]
substitute:  157: 10 [catch srfi-34 #<procedure 2c14080 at guix/ui.scm:411:2 ()> ...]
substitute:  157: 9 [catch system-error ...]
substitute: In guix/scripts/substitute.scm:
substitute:  946: 8 [#<procedure 2c140a0 at guix/scripts/substitute.scm:939:3 ()>]
substitute:  804: 7 [process-query "info /gnu/store/qdz5fp0g0sic5vc8ysvkbdm6yilcbl0d-fontforge-20120731-b " ...]
substitute:  633: 6 [lookup-narinfos/diverse # #]
substitute:  617: 5 [lookup-narinfos "https://hydra.gnu.org" #]
substitute:  589: 4 [fetch-narinfos "https://hydra.gnu.org" #]
substitute:  222: 3 [download-cache-info "https://hydra.gnu.org"]
substitute: In guix/records.scm:
substitute:  331: 2 [recutils->alist #<unspecified>]
substitute: In ice-9/rdelim.scm:
substitute:  184: 1 [read-line #<unspecified> trim]
substitute: In unknown file:
substitute:    ?: 0 [%read-line #<unspecified>]
substitute: 
substitute: ERROR: In procedure %read-line:
substitute: ERROR: In procedure %read-line: Wrong type argument in position 1 (expecting open input port): #<unspecified>
guix build: error: corrupt input while restoring archive from #<closed: file 0>

This is with commit 23d60ba65c137abf472a25db7317154abfc4af4d, and I also just
reconfigured my system to profit from the most recent updates to the daemon,
which would allow me to drop typing the "--substitute-urls=..." over and over
again.

If I understood the commit messages correctly, a mirror should be used instead
of the above https://hydra.gnu.org.

Even "./pre-inst-env guix system reconfigure ... --no-substitutes" is broken
with the same message, even after doing a ./bootstrap and complete
recompilation.

Time to go back to a previous system...

Andreas