bt

Debugger entered--Lisp error: (wrong-type-argument stringp (:error (error connection-failed "deleted
" :host "api.dan.co.jp" :service 80) :error (error connection-failed "failed with code 111
" :host "api.dan.co.jp" :service 80)))
  message((:error (error connection-failed "deleted\n" :host "api.dan.co.jp" :service 80) :error (error connection-failed "failed with code 111\n" :host "api.dan.co.jp" :service 80)))
  (if status (message status) (let (...) (with-temp-buffer ... ... ...)))
  (lambda (status) (url-mark-buffer-as-dead (current-buffer)) (if status (message status) (let ... ...)))((:error (error connection-failed "deleted\n" :host "api.dan.co.jp" :service 80) :error (error connection-failed "failed with code 111\n" :host "api.dan.co.jp" :service 80)))
  apply((lambda (status) (url-mark-buffer-as-dead (current-buffer)) (if status (message status) (let ... ...))) (:error (error connection-failed "deleted\n" :host "api.dan.co.jp" :service 80) :error (error connection-failed "failed with code 111\n" :host "api.dan.co.jp" :service 80)))
  url-http-activate-callback()
  url-http-async-sentinel(#<process api.dan.co.jp> "deleted\n")
  kill-buffer(#<buffer  *http api.dan.co.jp:80*>)
  url-gc-dead-buffers()
  url-retrieve-internal("http://api.dan.co.jp/perleval.cgi?c=cb&s=print%20%24%24%3b%0a%0a" (lambda (status) (url-mark-buffer-as-dead (current-buffer)) (if status (message status) (let ... ...))) (nil))
  url-retrieve("http://api.dan.co.jp/perleval.cgi?c=cb&s=print%20%24%24%3b%0a%0a" (lambda (status) (url-mark-buffer-as-dead (current-buffer)) (if status (message status) (let ... ...))))
  (let ((url ...) (cb ...)) (url-retrieve url cb))
  dan-perl(#("print $$;\n\n" 0 5 (face cperl-nonoverridable-face fontified t) 5 10 (fontified t) 10 11 (fontified t)))
  dan-perl-buffer()
  call-interactively(dan-perl-buffer)
  execute-extended-command(nil)
  call-interactively(execute-extended-command)