lisp-prev-l/c-dir/file

lisp-prev-l/c-dir/file is a variable defined in `inf-lisp.el'.
Its value is

nil

Documentation:
Record last directory and file used in loading or compiling.
This holds a cons cell of the form `(DIRECTORY . FILE)'
describing the last `lisp-load-file' or `lisp-compile-file' command.