From: Eli Zaretskii <eliz@gnu.org>
To: Philipp Stephani <p.stephani2@gmail.com>
Cc: 28625@debbugs.gnu.org, jwiegley@gmail.com, eggert@cs.ucla.edu
Subject: bug#28625: [PROPOSED] Speed up (format "%s" STRING) and the like
Date: Sat, 07 Oct 2017 14:34:27 +0300 [thread overview]
Message-ID: <83shevtcn0.fsf@gnu.org> (raw)
In-Reply-To: <CAArVCkRo1PxPruhAVmws0Gpo=iMCtj9iz87zrniqpJqGCjrqQw@mail.gmail.com> (message from Philipp Stephani on Sat, 07 Oct 2017 10:56:52 +0000)
> From: Philipp Stephani <p.stephani2@gmail.com>
> Date: Sat, 07 Oct 2017 10:56:52 +0000
> Cc: jwiegley@gmail.com, eggert@cs.ucla.edu, 28625@debbugs.gnu.org
>
> > Shouldn't this at least be documented in the "Incompatible Lisp changes" section of NEWS?
>
> If it's incompatible, sure. Is it? Can you show the effect of the
> incompatibility?
>
> $ emacs -Q -batch -eval '(let* ((a "a") (b (format "%s" a))) (aset a 0 ?b) (print b))'
>
> With Emacs 25.3 this prints "a", with current master it prints "b".
You could see the same behavior with earlier versions when the string
was empty, so we just expanded this behavior, not really changed it.
However, I see your point, so I moved the entry into the Incompatible
Lisp Changes section.
next prev parent reply other threads:[~2017-10-07 11:34 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-27 18:52 bug#28625: [PROPOSED] Speed up (format "%s" STRING) and the like Paul Eggert
2017-09-27 20:00 ` John Wiegley
2017-09-27 20:11 ` Paul Eggert
2017-09-27 21:33 ` John Wiegley
2017-09-27 23:33 ` Paul Eggert
2017-09-28 5:40 ` John Wiegley
2017-10-07 9:12 ` Philipp Stephani
2017-10-07 9:48 ` Eli Zaretskii
2017-10-07 10:56 ` Philipp Stephani
2017-10-07 11:34 ` Eli Zaretskii [this message]
2017-09-28 1:47 ` Noam Postavsky
2017-09-29 15:48 ` Eli Zaretskii
2017-10-04 21:45 ` Paul Eggert
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