Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
  <(1 nil)
  (and mumamo-last-new-chunk first-check-from (< first-check-from (overlay-end mumamo-last-new-chunk)))
  (if (and mumamo-last-new-chunk first-check-from (< first-check-from ...)) (progn (setq mumamo-last-new-chunk ...)))
  (when (and mumamo-last-new-chunk first-check-from (< first-check-from ...)) (setq mumamo-last-new-chunk (overlay-get mumamo-last-new-chunk ...)))
  (progn (setq mumamo-last-new-chunk (overlay-get new-chunk-at-change-min ...)) (when (and mumamo-last-new-chunk first-check-from ...) (setq mumamo-last-new-chunk ...)))
  (if new-chunk-at-change-min (progn (setq mumamo-last-new-chunk ...) (when ... ...)))
  (when new-chunk-at-change-min (setq mumamo-last-new-chunk (overlay-get new-chunk-at-change-min ...)) (when (and mumamo-last-new-chunk first-check-from ...) (setq mumamo-last-new-chunk ...)))
  (progn (when new-chunk-at-change-min (setq mumamo-last-new-chunk ...) (when ... ...)))
  (if (mumamo-make-new-chunks) (progn (when new-chunk-at-change-min ... ...)))
  (when (mumamo-make-new-chunks) (when new-chunk-at-change-min (setq mumamo-last-new-chunk ...) (when ... ...)))
  (progn (when (mumamo-make-new-chunks) (when new-chunk-at-change-min ... ...)) (setq mumamo-last-chunk-change-pos nil))
  (if mumamo-last-chunk-change-pos (progn (when ... ...) (setq mumamo-last-chunk-change-pos nil)))
  (when mumamo-last-chunk-change-pos (when (mumamo-make-new-chunks) (when new-chunk-at-change-min ... ...)) (setq mumamo-last-chunk-change-pos nil))
  (let* ((change-min ...) (change-max ...) (new-chunk-at-change-min ...) (new-chunk-at-change-min-start ...) (this-new-syntax-min-max ...) (this-new-syntax-min ...) (in-new-min-border ...) (here ...) (first-check-from ...)) (when mumamo-last-chunk-change-pos (when ... ...) (setq mumamo-last-chunk-change-pos nil)) (let* (... ... ... ... narpos this-new-values this-new-chunk prev-new-chunk first-change-pos interrupted ... ... ... ... ...) (when ... ...) (unless this-new-chunk ...) (setq mumamo-find-chunks-level ...) (when this-new-chunk ... ...) (when end-param ...)))
  (save-restriction (widen) (let* (... ... ... ... ... ... ... ... ...) (when mumamo-last-chunk-change-pos ... ...) (let* ... ... ... ... ... ...)))
  mumamo-find-chunks(1 "mumamo-set-major-post-command")
  (let* ((ovl ...) (major ...) (in-pre-hook ...)) (if (not major) (lwarn ... :error "major=%s" major) (unless ... ...)))
  mumamo-set-major-post-command()
  (if font-lock-mode (mumamo-set-major-post-command))
  mumamo-post-command-1()
  eval((mumamo-post-command-1))
  eval-expression((mumamo-post-command-1) nil)
  call-interactively(eval-expression nil nil)