The application raised an exception with the message:

syntax->list: contract violation
  expected: syntax?
  given: '(#<syntax:/home/pasterack/racket73/collects/racket/private/define-struct.rkt:759:38 (define-syntaxes (struct:sticker make-sticker sticker? sticker-label) (#%app values))> #<syntax:/home/pasterack/racket73/collects/racket/private/define-struct.rkt:738:3...

Stack trace:

syntax->list at:
  <unknown location>
<unknown procedure> at:
  line 261, column 28, in file /home/pasterack/racket73/collects/racket/private/more-scheme.rkt
partition at:
  line 555, column 0, in file /home/pasterack/racket73/collects/racket/list.rkt
temp45 at:
  line 125, column 4, in file /home/pasterack/pasterack/pasterack.rkt
process-paste22 at:
  line 468, column 0, in file /home/pasterack/pasterack/pasterack.rkt
<unknown procedure> at:
  line 360, column 33, in file /home/pasterack/racket73/collects/racket/contract/private/arrow-higher-order.rkt
<unknown procedure> at:
  line 360, column 33, in file /home/pasterack/racket73/collects/racket/contract/private/arrow-higher-order.rkt