bug#29794: [core-updates] Another Hydra evaluation failed

[Mark H Weaver]

In the last hour or so, another Hydra evaluation failed, this time on
core-updates.  Here's the tail of the evaluator.log:

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;;; compiled 
/home/hydra/.cache/guile/ccache/2.2-LE-8-3.A/gnu/store/sr851pk6c79l5x8yz76zcvm802q7wr5p-git-export/gnu/system/examples/bare-bones.tmpl.go
;;; compiling 
/gnu/store/sr851pk6c79l5x8yz76zcvm802q7wr5p-git-export/build-aux/hydra/../../gnu/tests.scm
;;; compiled 
/home/hydra/.cache/guile/ccache/2.2-LE-8-3.A/gnu/store/sr851pk6c79l5x8yz76zcvm802q7wr5p-git-export/gnu/tests.scm.go
evaluating for 'x86_64-linux' (heap size: 749.0 MiB)...
evaluating for 'i686-linux' (heap size: 749.0 MiB)...
evaluating for 'armhf-linux' (heap size: 749.0 MiB)...
Backtrace:
In ice-9/eval.scm:
   191:35 19 (_ #(#(#<module (#{ g859}#) 29f5320> #<build-daemon?> ?)))
In guix/packages.scm:
   835:14 18 (cache! #<weak-table 6297/7027> #<package address@hidden gn?> ?)
In unknown file:
          17 (_ #<procedure thunk ()> #<procedure list _> #<undefined>)
In guix/packages.scm:
  1178:22 16 (thunk)
  1112:22 15 (bag->cross-derivation #<build-daemon 256.97 36fb3730> # ?)
In srfi/srfi-1.scm:
   592:17 14 (map1 (("isl" #<package address@hidden gnu/packages/gc?>) ?))
In guix/packages.scm:
   880:16 13 (expand-input #<build-daemon 256.97 36fb3730> #f ("?" ?) ?)
   835:14 12 (cache! #<weak-table 6297/7027> #<package address@hidden g?> ?)
In unknown file:
          11 (_ #<procedure thunk ()> #<procedure list _> #<undefined>)
In guix/packages.scm:
  1178:22 10 (thunk)
  1112:22  9 (bag->cross-derivation #<build-daemon 256.97 36fb3730> # ?)
In srfi/srfi-1.scm:
   592:17  8 (map1 (("gmp" #<package address@hidden gnu/packages/multi?>)))
In guix/packages.scm:
   880:16  7 (expand-input #<build-daemon 256.97 36fb3730> #f ("?" ?) ?)
   835:14  6 (cache! #<weak-table 6297/7027> #<package address@hidden gn?> ?)
In unknown file:
           5 (_ #<procedure thunk ()> #<procedure list _> #<undefined>)
In guix/packages.scm:
  1178:22  4 (thunk)
In guix/build-system/gnu.scm:
   480:13  3 (gnu-cross-build #<build-daemon 256.97 36fb3730> "gmp-?" ?)
In srfi/srfi-1.scm:
   592:29  2 (map1 (("cross-libc" #<derivation /gnu/store/k2pfc?>) #))
   592:17  1 (map1 (("cross-libc:static" #<derivation /gnu/store?> ?)))
In guix/build-system/gnu.scm:
   482:31  0 (_ ("cross-libc:static" #<derivation /gnu/store/k2pf?> ?))

guix/build-system/gnu.scm:482:31: guix/build-system/gnu.scm:482:31: Throw to 
key `srfi-34' with args `(#<condition &derivation-missing-output-error 
[derivation: #<derivation 
/gnu/store/k2pfca0qd9qkbg4wrxr877sh1a812fd5-mingw-w64-5.0-rc2.drv => 
/gnu/store/ypfrhfy0a4byagc2m16n35khrvsv4j70-mingw-w64-5.0-rc2 305f3960> output: 
"static"] 296f9c90>)'.

Some deprecated features have been used.  Set the environment
variable GUILE_WARN_DEPRECATED to "detailed" and rerun the
program to get more information.  Set it to "no" to suppress
this message.
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