bug: error when invoke delete when cursor is before `end-of-indentation` in python buffer

[tu10ng]

im using emacs 29: GNU Emacs 29.2 (build 2, x86_64-w64-mingw32) of 2024-02-02

• error image:

• cause error when cursor is before end-of-indentation, including cursor on the beginning-of-line.

for example, open a new python buffer, enter some new lines, and invoke delete key.

i think its because the code below:

(defcustom smart-hungry-delete-major-mode-dedent-function-alist '((python-mode . (lambda () (interactive) (python-indent-dedent-line-backspace nil))))
  "Number of characters to search back in the most."
  :safe t)

we shouldnt use nil as parameter for function python-indent-dedent-line-backspace, as it wants a numeric value.

• a quickfix could be this:

(setq smart-hungry-delete-major-mode-dedent-function-alist
      '((python-mode . (lambda ()
                         (interactive)
                         (if (bolp)
                             (python-indent-dedent-line-backspace 1)
                           (python-indent-dedent-line-backspace (current-column)))))))