From: Juri Linkov <juri@linkov.net>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 61215@debbugs.gnu.org
Subject: bug#61215: 29.0.60; font-lock broken in diff-mode with long lines
Date: Sun, 05 Feb 2023 20:28:24 +0200 [thread overview]
Message-ID: <86ilggc6gn.fsf@mail.linkov.net> (raw)
In-Reply-To: <83pmarufgi.fsf@gnu.org> (Eli Zaretskii's message of "Fri, 03 Feb 2023 13:59:57 +0200")
> This probably means diff-mode relies on the buffer being widened.
> Which is a bad idea for font-lock functions.
>
> Anyway, how about the below?
>
> diff --git a/lisp/vc/diff-mode.el b/lisp/vc/diff-mode.el
> index eb01ded..62db362 100644
> --- a/lisp/vc/diff-mode.el
> +++ b/lisp/vc/diff-mode.el
> @@ -2762,7 +2762,10 @@ diff-syntax-fontify-hunk
> "Highlight source language syntax in diff hunk between BEG and END.
> When OLD is non-nil, highlight the hunk from the old source."
> (goto-char beg)
> - (let* ((hunk (buffer-substring-no-properties beg end))
> + (let* ((hunk (buffer-substring-no-properties (min (max beg (point-min))
> + (point-max))
> + (max (min end (point-max))
> + (point-min))))
Now a new error:
Debugger entered--Lisp error: (error "Unknown diff hunk type")
signal(error ("Unknown diff hunk type"))
error("Unknown diff hunk type")
diff-hunk-text("" t nil)
diff-syntax-fontify-hunk(2000 250992 nil)
diff-syntax-fontify(2000 250992)
#<subr F616e6f6e796d6f75732d6c616d626461_anonymous_lambda_39>(2000 250992)
diff--iterate-hunks(10000 #<subr F616e6f6e796d6f75732d6c616d626461_anonymous_lambda_39>)
diff--font-lock-syntax(10000)
font-lock-fontify-keywords-region(1527 10000 nil)
font-lock-default-fontify-region(1527 3027 nil)
font-lock-fontify-region(1527 3027)
#f(compiled-function (fun) #<bytecode -0x156e32bfeabd7fc3>)(font-lock-fontify-region)
run-hook-wrapped(#f(compiled-function (fun) #<bytecode -0x156e32bfeabd7fc3>) font-lock-fontify-region)
jit-lock--run-functions(1527 3027)
jit-lock-fontify-now(1527 3027)
jit-lock-function(1527)
redisplay_internal\ \(C\ function\)()
If you think the problem is in diff-syntax-fontify-hunk,
then I could try to find a working workaround local to diff-mode.
next prev parent reply other threads:[~2023-02-05 18:28 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-01 18:18 bug#61215: 29.0.60; font-lock broken in diff-mode with long lines Juri Linkov
2023-02-01 18:35 ` Eli Zaretskii
2023-02-02 17:16 ` Juri Linkov
2023-02-02 20:41 ` Eli Zaretskii
2023-02-03 7:53 ` Juri Linkov
2023-02-03 11:59 ` Eli Zaretskii
2023-02-05 18:28 ` Juri Linkov [this message]
2023-02-05 18:38 ` Eli Zaretskii
2023-02-06 17:15 ` Juri Linkov
2023-02-06 18:10 ` Eli Zaretskii
2023-02-06 18:11 ` Gregory Heytings
2023-02-27 18:28 ` Juri Linkov
2023-02-27 19:07 ` Eli Zaretskii
2023-02-27 19:23 ` Gregory Heytings
2023-02-27 19:25 ` Gregory Heytings
2023-03-30 23:22 ` Gregory Heytings
2023-03-31 7:10 ` Juri Linkov
2023-03-31 7:30 ` Juri Linkov
2023-04-01 0:22 ` Gregory Heytings
2023-04-01 18:19 ` Juri Linkov
2023-03-31 7:40 ` Gregory Heytings
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