backtrace()
  tramp-signal-hook-function(file-error ("Timeout reached, see buffer ‘*tramp/yadm carbon*’ ..."))
  signal(file-error ("Timeout reached, see buffer ‘*tramp/yadm carbon*’ ..."))
  tramp-maybe-open-connection((tramp-file-name "yadm" nil nil #("carbon" 0 6 (tramp-default t)) nil "." nil))
  tramp-send-command((tramp-file-name "yadm" nil nil #("carbon" 0 6 (tramp-default t)) nil "." nil) "cd ~ && pwd")
  tramp-sh-handle-expand-file-name("/yadm::." nil)
  apply(tramp-sh-handle-expand-file-name ("/yadm::." nil))
  tramp-sh-file-name-handler(expand-file-name "/yadm::." nil)
  apply(tramp-sh-file-name-handler expand-file-name ("/yadm::." nil))
  tramp-file-name-handler(expand-file-name "/yadm::." nil)
  expand-file-name("/yadm::.")
  find-file-noselect("/yadm::." nil nil nil)
  find-file("/yadm::.")
  eval-buffer()  ; Reading at buffer position 421
  funcall-interactively(eval-buffer)
  call-interactively(eval-buffer record nil)
  command-execute(eval-buffer record)
  execute-extended-command(nil "eval-buffer" "eval-bu")
  funcall-interactively(execute-extended-command nil "eval-buffer" "eval-bu")
  call-interactively(execute-extended-command nil nil)
  command-execute(execute-extended-command)