bug#33314: 27.0.50; wrong compiler warning

[Noam Postavsky <npostavs@gmail.com>]

tags 33314 unreproducible moreinfo
quit

Andreas Röhler <andreas.roehler@online.de> writes:

> So regexpvalue is used too. May send the complete function if interested.

Please do, I can't reproduce the warning you claimed in your original
report (and frankly, I think you've been doing this long enough that you
should know by now that such an abbreviated report is not very helpful).

Trying to fill in your example like this:

    ;;; -*- lexical-binding: t -*-

    (defun foo (regexp &optional something)
       "..."
       (unless (bobp)
         (when (empty-line-p) (skip-chars-backward " \t\r\n\f"))
         (let* ((orig (point))
                (regexpvalue (if (eq regexp 'py-clause-re)
                                 (symbol-value
                                  'py-extended-block-or-clause-re)
                               (symbol-value regexp))))
           t)))

gives

    bug-33314-bcomp-warning.el:3:1:Warning: Unused lexical variable ‘regexpvalue’
    bug-33314-bcomp-warning.el:3:1:Warning: Unused lexical variable ‘orig’
    bug-33314-bcomp-warning.el:3:1:Warning: Unused lexical argument ‘something’

    In end of data:
    bug-33314-bcomp-warning.el:13:1:Warning: the function ‘empty-line-p’ is not
        known to be defined.

`regexp' is not mentioned, but the other unused variables are, as
expected.