GNU bug report logs - #48479
28.0.50; Crash on `read--expression'

Previous Next

Full log

View this message in rfc822 format

From: Mattias Engdegård <mattiase <at> acm.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 48479 <at> debbugs.gnu.org
Subject: bug#48479: 28.0.50; Crash on `read--expression'
Date: Tue, 18 May 2021 17:00:33 +0200

18 maj 2021 kl. 13.29 skrev Eli Zaretskii <eliz <at> gnu.org>:

> What would be the advantage of making it an error?

Detecting mistakes, early. There are many possible reasons for making ones; misplaced brackets is but one.

In the Lisp implementation tradition we do not benefit from a monolithic parser that verifies all aspects of the grammar in one go, so extra care has to be taken in each special form. A sloppy parse is unhelpful: it hides mistakes and impedes backward-compatible language evolution. There is no advantage to it.

Furthermore, reporting syntax errors as warnings but still accepting the code really makes no sense, other as a temporary measure to avoid breaking invalid code right away (if that is seen as something positive).

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.