From: Juanma Barranquero <lekktu@gmail.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 14595@debbugs.gnu.org
Subject: bug#14595: Erroneous composition of lambda in emacs-lisp buffers with prog-prettify-symbols enabled
Date: Sat, 15 Jun 2013 19:35:38 +0200 [thread overview]
Message-ID: <CAAeL0SRK-TT-RigMexmEOYBXaao1TBVUw=q0-0-E0mmaeMEMog@mail.gmail.com> (raw)
In-Reply-To: <83ehc3viss.fsf@gnu.org>
On Sat, Jun 15, 2013 at 11:12 AM, Eli Zaretskii <eliz@gnu.org> wrote:
> The incorrect display happens when the underlined part below
>
> (compose-region start end (cdr (assoc (match-string 0) alist)))))
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
> is nil. When that happens, (match-string 0) is "(", the left
> parenthesis, not the expected "lambda".
The call to syntax-ppss inside prog--prettify-font-lock-compose-symbol
is altering the match-string data. I saved (match-string 0) in the
let* as ms0, and then for the erroneous lines I get this log:
start = 2507 / end = 2513 / (match-string 0) = #("(" 0 1 (fontified
t)) / ms0 = #("lambda" 0 6 (fontified t)) / alist = (("lambda" . 955))
so it was correct when the function was called. Then I wrapped the
syntax-ppss call inside save-match-data and the bug disappears.
> I hope fontification gurus will be able to tell us why this could
> happen.
Yep.
next prev parent reply other threads:[~2013-06-15 17:35 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-12 3:18 bug#14595: Erroneous composition of lambda in emacs-lisp buffers with prog-prettify-symbols enabled Juanma Barranquero
2013-06-15 8:21 ` Ted Zlatanov
2013-06-15 9:00 ` Eli Zaretskii
2013-06-15 9:12 ` Eli Zaretskii
2013-06-15 17:35 ` Juanma Barranquero [this message]
2013-06-15 17:49 ` Juanma Barranquero
2013-06-15 20:51 ` Juanma Barranquero
2013-06-16 0:13 ` Ted Zlatanov
2013-06-16 0:53 ` Stefan Monnier
2013-06-16 1:19 ` Juanma Barranquero
2013-06-16 1:32 ` Juanma Barranquero
2013-06-16 0:17 ` Ted Zlatanov
2013-06-16 2:50 ` Eli Zaretskii
2013-06-16 3:01 ` Juanma Barranquero
2013-06-16 9:27 ` Ted Zlatanov
2013-06-16 16:17 ` Eli Zaretskii
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