I think the function tags--compat-initialize in etags.el is calling fileloop-initialize in fileloop.el with the second and thirds arguments swapped.
[etags.el, line 1786]
(defun tags--compat-initialize (initialize)
(fileloop-initialize
(tags--compat-files initialize)
(if tags-loop-operate
(lambda () (tags-loop-eval tags-loop-operate))
(lambda () (message "Scanning file %s...found" buffer-file-name) nil))
(lambda () (tags-loop-eval tags-loop-scan))))
whereas:
[fileloop.el, line 62]
(defun fileloop-initialize (files scan-function operate-function) ... )
These files are dated 2020 and 2022 respectively and I believe they are the latest (full version info below)
Simply modifying
tags--compat-initialize
by swapping the second and third args in the call to fileloop-initialize would fix this I think.
I found this because po-tags-search in po-mode.el doesn't work properly for me, and it requires etags for its operation.
Thanks,
Peter
---
In GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.24, cairo version 1.16.0)
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