GNU bug report logs - #77744
31.0.50; Inconsistent error signal in up-list-default-function and treesit-up-list

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Package: emacs;

Reported by: Roman Rudakov <rrudakov <at> fastmail.com>

Date: Fri, 11 Apr 2025 14:28:02 UTC

Severity: normal

Fixed in version 31.0.50

Done: Juri Linkov <juri <at> linkov.net>

Bug is archived. No further changes may be made.

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From: Juri Linkov <juri <at> linkov.net>
To: Roman Rudakov <rrudakov <at> fastmail.com>
Cc: Stefan Monnier <monnier <at> iro.umontreal.ca>, 77744 <at> debbugs.gnu.org
Subject: bug#77744: 31.0.50; Inconsistent error signal in up-list-default-function and treesit-up-list
Date: Fri, 11 Apr 2025 19:25:17 +0300

> In Tree-sitter-based major modes, when up-list (or backward-up-list) is
> used, the operation is delegated to the treesit-up-list function. In
> traditional major modes, this is typically handled by
> up-list-default-function if a custom up-list-function is not defined. When
> the top level is reached, up-list-default-function signals scan-error, but
> treesit-up-list signals user-error.

This is because 'up-list-default-function' signals both:

  (if no-syntax-crossing
      ;; Assume called interactively; don't signal an error.
      (user-error "At top level")
    (signal (car err) (cdr err)))
This bug report was last modified 99 days ago.

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