bug#26791: Attempt to apply a string as a procedure during Hydra evaluation

[Mark H Weaver <mhw@netris.org>]

The error message is:

  ERROR: In procedure GNU with Linux-Libre 4.11 (beta):
  ERROR: Wrong type to apply: "GNU with Linux-Libre 4.11 (beta)"

Here's the head and tail of the output of the evaluator.  Unfortunately,
the relevant git commit is not printed.

      Mark


--8<---------------cut here---------------start------------->8---
considering jobset gnu:master (last checked 72008s ago)
checking out Git branch master from https://git.savannah.gnu.org/r/guix.git
Initialized empty Git repository in /tmp/git-checkout-tmp-9693/git-export/.git/
From /var/lib/hydra/scm/git/f08e53b7f0f3ce68a74e8745c37add3d0aecabda3e30c724b0d838fdc6743e2b
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
Switched to a new branch 'fetchgit'
removing `.git'...
hash is c2f6ba71188a29e6940662f54dded0b754a41d03fe05d2e40bc1e054299f7ffa
path is /gnu/store/vsw3112dw48ai5arsxf1qsvma8y4fvqp-git-export
evaluator hydra-eval-guile-jobs
hydra-eval-guile-jobs returned exit code 1:
;;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0
;;;       or pass the --no-auto-compile argument to disable.
;;; compiling /usr/local/bin/hydra-eval-guile-jobs
;;; compiled /home/hydra/.cache/guile/ccache/2.0-LE-8-2.0/usr/local/bin/hydra-eval-guile-jobs.go
adding `/gnu/store/vsw3112dw48ai5arsxf1qsvma8y4fvqp-git-export' to the load path
prepending "/gnu/store/vsw3112dw48ai5arsxf1qsvma8y4fvqp-git-export/build-aux/hydra/../.." to the load path
;;; compiling /home/hydra/.guix-profile/share/guile/site/2.0/guix/config.scm
;;; compiled /home/hydra/.cache/guile/ccache/2.0-LE-8-2.0/gnu/store/swbhvy5vw84hwjxwc2v069fdmr6b1cfy-guix-0.12.0-2.b291/share/guile/site/2.0/guix/config.scm.g
o

[...]

;;; compiling /gnu/store/vsw3112dw48ai5arsxf1qsvma8y4fvqp-git-export/build-aux/hydra/../../gnu/packages/wine.scm
;;; compiled /home/hydra/.cache/guile/ccache/2.0-LE-8-2.0/gnu/store/vsw3112dw48ai5arsxf1qsvma8y4fvqp-git-export/gnu/packages/wine.scm.go
;;; compiling /gnu/store/vsw3112dw48ai5arsxf1qsvma8y4fvqp-git-export/build-aux/hydra/../../gnu/packages/xfce.scm
;;; compiled /home/hydra/.cache/guile/ccache/2.0-LE-8-2.0/gnu/store/vsw3112dw48ai5arsxf1qsvma8y4fvqp-git-export/gnu/packages/xfce.scm.go
;;; compiling /gnu/store/vsw3112dw48ai5arsxf1qsvma8y4fvqp-git-export/build-aux/hydra/../../gnu/packages/xnee.scm
;;; compiled /home/hydra/.cache/guile/ccache/2.0-LE-8-2.0/gnu/store/vsw3112dw48ai5arsxf1qsvma8y4fvqp-git-export/gnu/packages/xnee.scm.go
Backtrace:
In unknown file:
   ?: 19 [apply-smob/1 #<catch-closure 2387c00>]
In ice-9/boot-9.scm:
  66: 18 [call-with-prompt prompt0 ...]
In ice-9/eval.scm:
 432: 17 [eval # #]
In unknown file:
   ?: 16 [call-with-input-string "(apply (module-ref (resolve-interface '(hydra-eval-guile-jobs)) 'eval-guile-jobs) (cdr (command-line)))" ...]
In ice-9/command-line.scm:
 181: 15 [#<procedure 2399320 at ice-9/command-line.scm:176:6 (port)> #<input: string 2952820>]
In unknown file:
   ?: 14 [eval (apply (module-ref # #) (cdr #)) #<directory (guile-user) 2374bd0>]
In /usr/local/bin/hydra-eval-guile-jobs:
 240: 13 [eval-guile-jobs "/gnu/store/vsw3112dw48ai5arsxf1qsvma8y4fvqp-git-export/build-aux/hydra/gnu-system.scm" ...]
In ice-9/eval.scm:
 481: 12 [lp (#<fluid 38>) (#f)]
In srfi/srfi-1.scm:
 643: 11 [append-map #<procedure 56f3750 at ice-9/eval.scm:416:20 (a)> #]
 575: 10 [map #<procedure 56f3750 at ice-9/eval.scm:416:20 (a)> #]
In ice-9/eval.scm:
 387: 9 [eval # #]
 387: 8 [eval # #]
 387: 7 [eval # #]
In guix/store.scm:
1338: 6 [run-with-store # #<procedure a6d5c90 at ice-9/eval.scm:416:20 (a)> # ...]
In gnu/system/vm.scm:
 287: 5 [#<procedure a8c48c0 at gnu/system/vm.scm:287:4 (state)> #]
In gnu/services.scm:
 268: 4 [#<procedure c536ed0 at gnu/services.scm:268:2 (state)> #]
In gnu/system.scm:
 293: 3 [#<procedure 92d6a00 at gnu/system.scm:293:8 (state)> #]
 797: 2 [#<procedure 7a1ccc0 at gnu/system.scm:797:2 (state)> #]
 778: 1 [#<procedure 948bc00 at gnu/system.scm:773:2 (state)> #]
In unknown file:
   ?: 0 ["GNU with Linux-Libre 4.11 (beta)" "GNU with Linux-Libre 4.11 (beta)"]

ERROR: In procedure GNU with Linux-Libre 4.11 (beta):
ERROR: Wrong type to apply: "GNU with Linux-Libre 4.11 (beta)"
--8<---------------cut here---------------end--------------->8---