Cannot visit files under subtree about dired-hacks

[Fuco1]

I can't reproduce this. Do you use some other dired-related packages?

[tuhdo]

No, I reproduced it from emacs -q:

1. Add MELPA.
2. Install dired-subtree from MELPA.
3. Open a Dired buffer, move point to a directory in that Dired buffer.
4. Run dired-subtree-insert.
5. Press RET or o.
6. Error:

Debugger entered--Lisp error: (error "No file on this line")
  signal(error ("No file on this line"))
  error("No file on this line")
  dired-get-file-for-visit()
  dired-find-file()
  call-interactively(dired-find-file nil nil)
  command-execute(dired-find-file)