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Subject: Re: bug#77151: 31.0.50; >>= is not rendered
To: Eli Zaretskii <eliz@HIDDEN>
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Le 31/03/2025 à 14:51, Eli Zaretskii a écrit :
> Thanks. Would you please tell here when the next release of the font
> is available?
Of course!
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<div class="moz-cite-prefix">Le 31/03/2025 à 14:51, Eli Zaretskii a
écrit :<span style="white-space: pre-wrap">
</span></div>
<blockquote type="cite" cite="mid:86h6394b49.fsf@HIDDEN">
<pre wrap="" class="moz-quote-pre">Thanks. Would you please tell here when the next release of the font
is available?
</pre>
</blockquote>
<p>Of course!</p>
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bug-gnu-emacs@HIDDEN:bug#77151; Package emacs.
Full text available.Received: (at 77151) by debbugs.gnu.org; 31 Mar 2025 12:51:16 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Mar 31 08:51:15 2025 Received: from localhost ([127.0.0.1]:40254 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1tzEbi-0007gI-O6 for submit <at> debbugs.gnu.org; Mon, 31 Mar 2025 08:51:15 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:47118) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1tzEbd-0007eW-Tw for 77151 <at> debbugs.gnu.org; Mon, 31 Mar 2025 08:51:11 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1tzEbX-0000Sl-LA; Mon, 31 Mar 2025 08:51:03 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=dkZmqCTITr3Y7ze9tDR8DVeKrhNeIIyvLdBQRRPekFo=; b=gyQzV3gDMtShhPzhVpCd nH3+ZR12wr8/K/z54E00HV6K7fRcvrVNWCwBXIu6SCDkl9ldgZa7KMeENaTnQ96braHt8veqrToed F0H/pIb2Ul7y43l3qDQHy/In/iPVTW7rQnc4lpKfG4NPEfAt5WpO5ropcUB8b7a72uKPHYz3X9hRV dcQIbiyKWN558C8LEosV4eq3Pjb9bQPS95oXR/4TLfxUgB9xdneZlHw74XdKZn/E/TjsMD1euoive 5IicrRvTLzjoezDTgOjrOrDViPxgPj8PSqUMzFZ/qBhnuDV3OtYSTauphjZ5+F91kRefNQKun7Wnw fAm4yGPONr9bFw==; Date: Mon, 31 Mar 2025 15:51:02 +0300 Message-Id: <86h6394b49.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Mattias Roux <mattias@HIDDEN> In-Reply-To: <eb8ec586-62cc-4a4a-ba4c-56952b9a0765@HIDDEN> (message from Mattias Roux on Sun, 30 Mar 2025 23:54:35 +0200) Subject: Re: bug#77151: 31.0.50; >>= is not rendered References: <0190d5fa-50bf-462d-9b30-27c796a79b66@HIDDEN> <86h63mldci.fsf@HIDDEN> <aa213d64-dbae-4866-b378-c4675bd08b53@HIDDEN> <86r02pjx8o.fsf@HIDDEN> <3e2d1956-64a6-451e-a35f-c88261d514aa@HIDDEN> <86h63hdu70.fsf@HIDDEN> <c08afa41-5976-4479-8276-9a7e41064513@HIDDEN> <86bjtodmxa.fsf@HIDDEN> <eb8ec586-62cc-4a4a-ba4c-56952b9a0765@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 77151 Cc: 77151 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > Date: Sun, 30 Mar 2025 23:54:35 +0200 > Cc: 77151 <at> debbugs.gnu.org > From: Mattias Roux <mattias@HIDDEN> > > Le 26/03/2025 à 12:57, Eli Zaretskii a écrit : > > Thanks. For posterity, the issue is here: > > https://github.com/tonsky/FiraCode/issues/1644 > > And for even more posterity, the bug comes from the font (and should be fixed in the next release): > https://github.com/tonsky/FiraCode/issues/1644#issuecomment-2764733880 > > Thanks again for answering and investigating :-) Thanks. Would you please tell here when the next release of the font is available?
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Subject: Re: bug#77151: 31.0.50; >>= is not rendered
To: Eli Zaretskii <eliz@HIDDEN>
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Le 26/03/2025 à 12:57, Eli Zaretskii a écrit :
> Thanks. For posterity, the issue is here:
>
> https://github.com/tonsky/FiraCode/issues/1644
And for even more posterity, the bug comes from the font (and should be
fixed in the next release):
https://github.com/tonsky/FiraCode/issues/1644#issuecomment-2764733880
Thanks again for answering and investigating :-)
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<div class="moz-cite-prefix">Le 26/03/2025 à 12:57, Eli Zaretskii a
écrit :<br>
</div>
<blockquote type="cite" cite="mid:86bjtodmxa.fsf@HIDDEN">
<pre wrap="" class="moz-quote-pre">Thanks. For posterity, the issue is here:
<a class="moz-txt-link-freetext" href="https://github.com/tonsky/FiraCode/issues/1644">https://github.com/tonsky/FiraCode/issues/1644</a></pre>
</blockquote>
<p><span style="white-space: pre-wrap">And for even more posterity, the bug comes from the font (and should be fixed in the next release): <a class="moz-txt-link-freetext" href="https://github.com/tonsky/FiraCode/issues/1644#issuecomment-2764733880">https://github.com/tonsky/FiraCode/issues/1644#issuecomment-2764733880</a></span></p>
<p><span style="white-space: pre-wrap">
</span></p>
<p><span style="white-space: pre-wrap">Thanks again for answering and investigating :-)
</span></p>
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bug-gnu-emacs@HIDDEN:bug#77151; Package emacs.
Full text available.Received: (at 77151) by debbugs.gnu.org; 26 Mar 2025 11:58:09 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Mar 26 07:58:09 2025 Received: from localhost ([127.0.0.1]:41826 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1txPOa-0001oF-Tz for submit <at> debbugs.gnu.org; Wed, 26 Mar 2025 07:58:09 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56976) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1txPOX-0001nU-8O for 77151 <at> debbugs.gnu.org; Wed, 26 Mar 2025 07:58:06 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1txPOQ-0001Vx-Ka; Wed, 26 Mar 2025 07:57:58 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=oBMZHfTnbYBd9UfsNf+jM+wDOyIUAq+HwNp2DCopKeg=; b=lCNa/bGnVou3 u3ApICeDC/WnwYcyo+Os0EqxlhzP45jC+dJlpYNmrYtnn/wgVuTLVJtwmRXcGKQMBpDydpzBM1Jk9 kql+f8LWHd67Ep1wYfJbin99wU1OLaf5goRc3S92OoziS73xF06GVFQZ6p82h2fRi1LqbuSBRVA7J RIcYopUi4XS6YP+1EezAton4pOFnJc4Mk2ZqAsbZgTx+cLbnPYmXHg2lexKvO9xQdSfp6n84ECkn1 l7TARLntS8Q9HA+kpjY6S7JJOSvEGo8ueX94kh3BNmNAIx++aTdMmuVUmcPxBYcKKLJPEutlyyE6Q WLqVprkS5texoBMePRlabg==; Date: Wed, 26 Mar 2025 13:57:37 +0200 Message-Id: <86bjtodmxa.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Mattias Roux <mattias@HIDDEN> In-Reply-To: <c08afa41-5976-4479-8276-9a7e41064513@HIDDEN> (message from Mattias Roux on Tue, 25 Mar 2025 21:46:34 +0100) Subject: Re: bug#77151: 31.0.50; >>= is not rendered References: <0190d5fa-50bf-462d-9b30-27c796a79b66@HIDDEN> <86h63mldci.fsf@HIDDEN> <aa213d64-dbae-4866-b378-c4675bd08b53@HIDDEN> <86r02pjx8o.fsf@HIDDEN> <3e2d1956-64a6-451e-a35f-c88261d514aa@HIDDEN> <86h63hdu70.fsf@HIDDEN> <c08afa41-5976-4479-8276-9a7e41064513@HIDDEN> X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 77151 Cc: 77151 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > Date: Tue, 25 Mar 2025 21:46:34 +0100 > Cc: 77151 <at> debbugs.gnu.org > From: Mattias Roux <mattias@HIDDEN> > > Hi Eli, thanks for the report :-) > > I forwarded it to the FiraCode issue I opened Thanks. For posterity, the issue is here: https://github.com/tonsky/FiraCode/issues/1644
bug-gnu-emacs@HIDDEN:bug#77151; Package emacs.
Full text available.Received: (at 77151) by debbugs.gnu.org; 25 Mar 2025 20:46:42 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Tue Mar 25 16:46:42 2025 Received: from localhost ([127.0.0.1]:40178 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1txBAY-00018v-E0 for submit <at> debbugs.gnu.org; Tue, 25 Mar 2025 16:46:42 -0400 Received: from smtp5-g21.free.fr ([2a01:e0c:1:1599::14]:24426) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <mattias@HIDDEN>) id 1txBAW-00018j-7J for 77151 <at> debbugs.gnu.org; Tue, 25 Mar 2025 16:46:41 -0400 Received: from [192.168.0.169] (unknown [78.192.180.147]) (Authenticated sender: mattias.roux@HIDDEN) by smtp5-g21.free.fr (Postfix) with ESMTPSA id 7AF595FF88; Tue, 25 Mar 2025 21:46:34 +0100 (CET) Message-ID: <c08afa41-5976-4479-8276-9a7e41064513@HIDDEN> Date: Tue, 25 Mar 2025 21:46:34 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: bug#77151: 31.0.50; >>= is not rendered To: Eli Zaretskii <eliz@HIDDEN> References: <0190d5fa-50bf-462d-9b30-27c796a79b66@HIDDEN> <86h63mldci.fsf@HIDDEN> <aa213d64-dbae-4866-b378-c4675bd08b53@HIDDEN> <86r02pjx8o.fsf@HIDDEN> <3e2d1956-64a6-451e-a35f-c88261d514aa@HIDDEN> <86h63hdu70.fsf@HIDDEN> Content-Language: en-MW From: Mattias Roux <mattias@HIDDEN> In-Reply-To: <86h63hdu70.fsf@HIDDEN> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 77151 Cc: 77151 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) Hi Eli, thanks for the report :-) I forwarded it to the FiraCode issue I opened
bug-gnu-emacs@HIDDEN:bug#77151; Package emacs.
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Date: Tue, 25 Mar 2025 17:08:19 +0200
Message-Id: <86h63hdu70.fsf@HIDDEN>
From: Eli Zaretskii <eliz@HIDDEN>
To: Mattias Roux <mattias@HIDDEN>
In-Reply-To: <3e2d1956-64a6-451e-a35f-c88261d514aa@HIDDEN> (message from
Mattias Roux on Mon, 24 Mar 2025 14:37:14 +0100)
Subject: Re: bug#77151: 31.0.50; >>= is not rendered
References: <0190d5fa-50bf-462d-9b30-27c796a79b66@HIDDEN>
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--=-=-=
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> Date: Mon, 24 Mar 2025 14:37:14 +0100
> Cc: 77151 <at> debbugs.gnu.org
> From: Mattias Roux <mattias@HIDDEN>
>
> Thanks for the thorough report :-)
>
> I raised the issue on the FiraCode repository and here's the answer:
>
> Considering that it works literally everywhere else, it probably has something to do with Emacs
>
> https://fonts.google.com/specimen/Fira+Code?preview.text=%3E%3E%3D
So I wanted to see if this is an Emacs problem or not. I did two
things:
. Tried the same in the Command Prompt of Windows 11, which on my
system uses Cascadia Code font, which also supports these
ligatures. Lo and behold, it behaves the same: ">>=" produces
something that doesn't look like a ligature (but if I watch
carefully, I do see that when I type the second ">", the two ">>"
together look differently than a single ">", so it's a different
font glyph -- exactly like I saw in the output of
find-composition). And if I type ">>==", I get the ligature,
exactly like in Emacs.
. Invoked hb-view, the standalone shaping program that is part of
HarfBuzz. I invoked it like this:
hb-view FiraCode-Regular.ttf --text=">>=" -o lig3.png -O png
The resulting file lg3.png is attached. You will see that it looks
exactly like the "no-ligature" result in Emacs. Then I tried the
same with the 4-character sequence:
hb-view FiraCode-Regular.ttf --text=">>==" -o lig4.png -O png
The file lig4.png is also attached. You will see that it shows the
ligature, identical to what Emacs produces with these 4 characters.
So at this point I see no evidence that Emacs does anything wrong,
since the standalone HarfBuzz shaping program produces the same output
as what Emacs shows. I wonder what am I missing, if indeed "every
other program does show the ligature" in the ">>=" case with the same
fonts. Maybe the font developers could tell more about what other
applications do, since AFAIK they all use HarfBuzz. Maybe they use
some optional features of the shaping? (I tried to turn on kerning,
it didn't help.)
--=-=-=
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Subject: Re: bug#77151: 31.0.50; >>= is not rendered
To: Eli Zaretskii <eliz@HIDDEN>
References: <0190d5fa-50bf-462d-9b30-27c796a79b66@HIDDEN>
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Content preview: Hi Eli, Thanks for the thorough report :-) I raised the issue
on the FiraCode repository and here's the answer
<https://github.com/tonsky/FiraCode/issues/1644#issuecomment-2748156170>:
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Hi Eli,
Thanks for the thorough report :-)
I raised the issue on the FiraCode repository and here's the answer
<https://github.com/tonsky/FiraCode/issues/1644#issuecomment-2748156170>:
Considering that it works literally everywhere else, it probably has
something to do with Emacs
https://fonts.google.com/specimen/Fira+Code?preview.text=%3E%3E%3D
Image
<https://private-user-images.githubusercontent.com/285292/426100705-b69cfdd7-0895-42f1-be0e-f2b0f3a24c90.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3NDI4MjM2MTEsIm5iZiI6MTc0MjgyMzMxMSwicGF0aCI6Ii8yODUyOTIvNDI2MTAwNzA1LWI2OWNmZGQ3LTA4OTUtNDJmMS1iZTBlLWYyYjBmM2EyNGM5MC5wbmc_WC1BbXotQWxnb3JpdGhtPUFXUzQtSE1BQy1TSEEyNTYmWC1BbXotQ3JlZGVudGlhbD1BS0lBVkNPRFlMU0E1M1BRSzRaQSUyRjIwMjUwMzI0JTJGdXMtZWFzdC0xJTJGczMlMkZhd3M0X3JlcXVlc3QmWC1BbXotRGF0ZT0yMDI1MDMyNFQxMzM1MTFaJlgtQW16LUV4cGlyZXM9MzAwJlgtQW16LVNpZ25hdHVyZT1kMmI4MTIyNDRkY2QzZjQ1YjBlYWNlMWQ4ZTJmNGM4YjRjYzhkYzVlOTNiNDljZTNmNTBiMzkxOTdmYzFmYTFmJlgtQW16LVNpZ25lZEhlYWRlcnM9aG9zdCJ9.f9_1FVImsqgkjFECPBIlzVYTHGkNL1wZEJThbEHf89U>
On 22/03/2025 9:16 AM, Eli Zaretskii wrote:
>> Date: Fri, 21 Mar 2025 18:46:30 +0100
>> Cc:77151 <at> debbugs.gnu.org
>> From: Mattias Roux<mattias@HIDDEN>
>>
>> As Mickey says when creating an issue:
>>
>> > If you're experiencing one of the following problems:
>> >
>> > - Emacs crashes when you use `ligature.el`;
>> > - Some ligations are visually garbled, cut off, or not rendering at all;
>> > - No ligations are showing at all;
>> > - Weird interactions with non-ligated characters around a ligated
>> character;
>> >
>> > Then it's very likely the issue is with **Emacs core**, and not
>> `ligature.el`. This package merely interacts
>> > with the Emacs text shaping engine to configure your ligature
>> settings. It does not, on its own, do any sort
>> > of ligation.
>>
>> That's why I created this bug report but since you asked I also created
>> an issue on the ligature repo:
>> https://github.com/mickeynp/ligature.el/issues/59
> Thanks.
>
> Looking at what happens, I'm not sure I see a bug in Emacs here. For
> the ">>=" case (where you see no ligation), find-composition produces
> the following:
>
> (267 270 [[#<font-object "-outline-Fira Code-regular-normal-normal-*-16-*-*-*-c-*-iso8859-1"> 62 62 61]
> 1
> [0 0 62 1650 10 0 0 15 5 nil]
> [1 1 62 1390 10 -8 8 15 5 nil]
> [2 2 61 1578 10 2 8 15 5 nil]])
>
> Whereas for the ">>==" case, where you see ligation, it produces the
> following:
>
> (467 471 [[#<font-object "-outline-Fira Code-regular-normal-normal-*-16-*-*-*-c-*-iso8859-1"> 62 62 61 61]
> 3
> [0 0 62 1650 10 0 0 15 5 nil]
> [1 1 62 1469 10 -7 10 15 5 nil]
> [2 2 61 1456 10 0 10 15 5 nil]
> [3 3 61 1455 10 0 8 15 5 nil]])
>
> (If you want to understand what these values mean, see the doc string
> of composition-get-gstring.)
>
> My conclusions from this are:
>
> . Emacs does recognize both cases as composable sequences
> . Emacs passes both sequences of characters to the shaping engine
> . The differences on display are because the shaping engine returned
> different sequences of font glyphs (the 4th element of the glyph
> vector) in each case
>
> So the reason for this is probably in the font itself? Maybe this
> should be taken up with the developers of the fonts? I see a very
> similar behavior with Cascadia Code, so maybe these fonts assume or
> require something which the particular ligatures you used violate?
--------------sSnuRMhGYyPXMyA5TsZXO0OK
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: 7bit
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<p>Hi Eli,</p>
<p>Thanks for the thorough report :-)</p>
<p>I raised the issue on the FiraCode repository and here's the <a
href="https://github.com/tonsky/FiraCode/issues/1644#issuecomment-2748156170">answer</a>:</p>
<div data-testid="markdown-body" data-team-hovercards-enabled="true"
class="markdown-body" data-turbolinks="false">
<div
class="Box-sc-g0xbh4-0 markdown-body NewMarkdownViewer-module__safe-html-box--cRsz0">
<p dir="auto">Considering that it works literally everywhere
else, it probably has something to do with Emacs</p>
<p dir="auto"><a
href="https://fonts.google.com/specimen/Fira+Code?preview.text=%3E%3E%3D"
rel="nofollow" class="moz-txt-link-freetext">https://fonts.google.com/specimen/Fira+Code?preview.text=%3E%3E%3D</a></p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer"
href="https://private-user-images.githubusercontent.com/285292/426100705-b69cfdd7-0895-42f1-be0e-f2b0f3a24c90.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3NDI4MjM2MTEsIm5iZiI6MTc0MjgyMzMxMSwicGF0aCI6Ii8yODUyOTIvNDI2MTAwNzA1LWI2OWNmZGQ3LTA4OTUtNDJmMS1iZTBlLWYyYjBmM2EyNGM5MC5wbmc_WC1BbXotQWxnb3JpdGhtPUFXUzQtSE1BQy1TSEEyNTYmWC1BbXotQ3JlZGVudGlhbD1BS0lBVkNPRFlMU0E1M1BRSzRaQSUyRjIwMjUwMzI0JTJGdXMtZWFzdC0xJTJGczMlMkZhd3M0X3JlcXVlc3QmWC1BbXotRGF0ZT0yMDI1MDMyNFQxMzM1MTFaJlgtQW16LUV4cGlyZXM9MzAwJlgtQW16LVNpZ25hdHVyZT1kMmI4MTIyNDRkY2QzZjQ1YjBlYWNlMWQ4ZTJmNGM4YjRjYzhkYzVlOTNiNDljZTNmNTBiMzkxOTdmYzFmYTFmJlgtQW16LVNpZ25lZEhlYWRlcnM9aG9zdCJ9.f9_1FVImsqgkjFECPBIlzVYTHGkNL1wZEJThbEHf89U"><img
src="https://private-user-images.githubusercontent.com/285292/426100705-b69cfdd7-0895-42f1-be0e-f2b0f3a24c90.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3NDI4MjM2MTEsIm5iZiI6MTc0MjgyMzMxMSwicGF0aCI6Ii8yODUyOTIvNDI2MTAwNzA1LWI2OWNmZGQ3LTA4OTUtNDJmMS1iZTBlLWYyYjBmM2EyNGM5MC5wbmc_WC1BbXotQWxnb3JpdGhtPUFXUzQtSE1BQy1TSEEyNTYmWC1BbXotQ3JlZGVudGlhbD1BS0lBVkNPRFlMU0E1M1BRSzRaQSUyRjIwMjUwMzI0JTJGdXMtZWFzdC0xJTJGczMlMkZhd3M0X3JlcXVlc3QmWC1BbXotRGF0ZT0yMDI1MDMyNFQxMzM1MTFaJlgtQW16LUV4cGlyZXM9MzAwJlgtQW16LVNpZ25hdHVyZT1kMmI4MTIyNDRkY2QzZjQ1YjBlYWNlMWQ4ZTJmNGM4YjRjYzhkYzVlOTNiNDljZTNmNTBiMzkxOTdmYzFmYTFmJlgtQW16LVNpZ25lZEhlYWRlcnM9aG9zdCJ9.f9_1FVImsqgkjFECPBIlzVYTHGkNL1wZEJThbEHf89U"
alt="Image" style="max-width: 100%;"></a></p>
</div>
</div>
<p></p>
<div class="moz-cite-prefix">On 22/03/2025 9:16 AM, Eli Zaretskii
wrote:<br>
</div>
<blockquote type="cite" cite="mid:86r02pjx8o.fsf@HIDDEN">
<blockquote type="cite">
<pre wrap="" class="moz-quote-pre">Date: Fri, 21 Mar 2025 18:46:30 +0100
Cc: <a class="moz-txt-link-abbreviated" href="mailto:77151 <at> debbugs.gnu.org">77151 <at> debbugs.gnu.org</a>
From: Mattias Roux <a class="moz-txt-link-rfc2396E" href="mailto:mattias@HIDDEN"><mattias@HIDDEN></a>
As Mickey says when creating an issue:
> If you're experiencing one of the following problems:
>
> - Emacs crashes when you use `ligature.el`;
> - Some ligations are visually garbled, cut off, or not rendering at all;
> - No ligations are showing at all;
> - Weird interactions with non-ligated characters around a ligated
character;
>
> Then it's very likely the issue is with **Emacs core**, and not
`ligature.el`. This package merely interacts
> with the Emacs text shaping engine to configure your ligature
settings. It does not, on its own, do any sort
> of ligation.
That's why I created this bug report but since you asked I also created
an issue on the ligature repo:
<a class="moz-txt-link-freetext" href="https://github.com/mickeynp/ligature.el/issues/59">https://github.com/mickeynp/ligature.el/issues/59</a>
</pre>
</blockquote>
<pre wrap="" class="moz-quote-pre">
Thanks.
Looking at what happens, I'm not sure I see a bug in Emacs here. For
the ">>=" case (where you see no ligation), find-composition produces
the following:
(267 270 [[#<font-object "-outline-Fira Code-regular-normal-normal-*-16-*-*-*-c-*-iso8859-1"> 62 62 61]
1
[0 0 62 1650 10 0 0 15 5 nil]
[1 1 62 1390 10 -8 8 15 5 nil]
[2 2 61 1578 10 2 8 15 5 nil]])
Whereas for the ">>==" case, where you see ligation, it produces the
following:
(467 471 [[#<font-object "-outline-Fira Code-regular-normal-normal-*-16-*-*-*-c-*-iso8859-1"> 62 62 61 61]
3
[0 0 62 1650 10 0 0 15 5 nil]
[1 1 62 1469 10 -7 10 15 5 nil]
[2 2 61 1456 10 0 10 15 5 nil]
[3 3 61 1455 10 0 8 15 5 nil]])
(If you want to understand what these values mean, see the doc string
of composition-get-gstring.)
My conclusions from this are:
. Emacs does recognize both cases as composable sequences
. Emacs passes both sequences of characters to the shaping engine
. The differences on display are because the shaping engine returned
different sequences of font glyphs (the 4th element of the glyph
vector) in each case
So the reason for this is probably in the font itself? Maybe this
should be taken up with the developers of the fonts? I see a very
similar behavior with Cascadia Code, so maybe these fonts assume or
require something which the particular ligatures you used violate?
</pre>
</blockquote>
</body>
</html>
--------------sSnuRMhGYyPXMyA5TsZXO0OK--
bug-gnu-emacs@HIDDEN:bug#77151; Package emacs.
Full text available.Stefan Kangas <stefankangas@HIDDEN>
to control <at> debbugs.gnu.org.
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Date: Sat, 22 Mar 2025 10:16:55 +0200
Message-Id: <86r02pjx8o.fsf@HIDDEN>
From: Eli Zaretskii <eliz@HIDDEN>
To: Mattias Roux <mattias@HIDDEN>
In-Reply-To: <aa213d64-dbae-4866-b378-c4675bd08b53@HIDDEN> (message from
Mattias Roux on Fri, 21 Mar 2025 18:46:30 +0100)
Subject: Re: bug#77151: 31.0.50; >>= is not rendered
References: <0190d5fa-50bf-462d-9b30-27c796a79b66@HIDDEN>
<86h63mldci.fsf@HIDDEN> <aa213d64-dbae-4866-b378-c4675bd08b53@HIDDEN>
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> Date: Fri, 21 Mar 2025 18:46:30 +0100
> Cc: 77151 <at> debbugs.gnu.org
> From: Mattias Roux <mattias@HIDDEN>
>
> As Mickey says when creating an issue:
>
> > If you're experiencing one of the following problems:
> >
> > - Emacs crashes when you use `ligature.el`;
> > - Some ligations are visually garbled, cut off, or not rendering at all;
> > - No ligations are showing at all;
> > - Weird interactions with non-ligated characters around a ligated
> character;
> >
> > Then it's very likely the issue is with **Emacs core**, and not
> `ligature.el`. This package merely interacts
> > with the Emacs text shaping engine to configure your ligature
> settings. It does not, on its own, do any sort
> > of ligation.
>
> That's why I created this bug report but since you asked I also created
> an issue on the ligature repo:
> https://github.com/mickeynp/ligature.el/issues/59
Thanks.
Looking at what happens, I'm not sure I see a bug in Emacs here. For
the ">>=" case (where you see no ligation), find-composition produces
the following:
(267 270 [[#<font-object "-outline-Fira Code-regular-normal-normal-*-16-*-*-*-c-*-iso8859-1"> 62 62 61]
1
[0 0 62 1650 10 0 0 15 5 nil]
[1 1 62 1390 10 -8 8 15 5 nil]
[2 2 61 1578 10 2 8 15 5 nil]])
Whereas for the ">>==" case, where you see ligation, it produces the
following:
(467 471 [[#<font-object "-outline-Fira Code-regular-normal-normal-*-16-*-*-*-c-*-iso8859-1"> 62 62 61 61]
3
[0 0 62 1650 10 0 0 15 5 nil]
[1 1 62 1469 10 -7 10 15 5 nil]
[2 2 61 1456 10 0 10 15 5 nil]
[3 3 61 1455 10 0 8 15 5 nil]])
(If you want to understand what these values mean, see the doc string
of composition-get-gstring.)
My conclusions from this are:
. Emacs does recognize both cases as composable sequences
. Emacs passes both sequences of characters to the shaping engine
. The differences on display are because the shaping engine returned
different sequences of font glyphs (the 4th element of the glyph
vector) in each case
So the reason for this is probably in the font itself? Maybe this
should be taken up with the developers of the fonts? I see a very
similar behavior with Cascadia Code, so maybe these fonts assume or
require something which the particular ligatures you used violate?
bug-gnu-emacs@HIDDEN:bug#77151; Package emacs.
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Subject: Re: bug#77151: 31.0.50; >>= is not rendered
To: Eli Zaretskii <eliz@HIDDEN>
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As Mickey says when creating an issue:
> If you're experiencing one of the following problems:
>
> - Emacs crashes when you use `ligature.el`;
> - Some ligations are visually garbled, cut off, or not rendering at all;
> - No ligations are showing at all;
> - Weird interactions with non-ligated characters around a ligated
character;
>
> Then it's very likely the issue is with **Emacs core**, and not
`ligature.el`. This package merely interacts
> with the Emacs text shaping engine to configure your ligature
settings. It does not, on its own, do any sort
> of ligation.
That's why I created this bug report but since you asked I also created
an issue on the ligature repo:
https://github.com/mickeynp/ligature.el/issues/59
On 21/03/2025 2:31 PM, Eli Zaretskii wrote:
>> Date: Fri, 21 Mar 2025 13:41:57 +0100
>> From: Mattias Roux <mattias@HIDDEN>
>>
>> Hi,
>>
>> From emacs -Q you can evaluate the following code:
>>
>> (require 'package)
>> (add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/"))
>> (package-initialize)
>>
>> (set-face-font 'default "Fira Code")
>>
>> (use-package ligature
>> :ensure t
>> :config
>> ;; Enable the "www" ligature in every possible major mode
>> (ligature-set-ligatures 't '("www"))
>> ;; Enable traditional ligature support in eww-mode, if the
>> ;; `variable-pitch' face supports it
>> (ligature-set-ligatures 'eww-mode '("ff" "fi" "ffi"))
>> ;; Enable all Fira Code ligatures in programming modes
>> (ligature-set-ligatures 'prog-mode '((">" (rx (+ (or ">" "<" "|" "/" ":"
>> "=" "-"))))))
>> ;; Enables ligature checks globally in all buffers. You can also do it
>> ;; per mode with `ligature-mode'.
>> (global-ligature-mode t)
>> (message "`ligature' loaded"))
>>
>> Now, if you open /tmp/test.el and write >>=, it won't be rendered, but
>> if you add any character (like = or :) it will.
>>
>> I also tested it with emacs 30.1
> Thanks, but did you report this to the developers of the "ligature"
> package first? If so, what did they say to indicate that this problem
> is in Emacs and not in the package?
>
> If you haven't reported this to the package developers yet, please do,
> since the package is not part of Emacs.
bug-gnu-emacs@HIDDEN:bug#77151; Package emacs.
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Date: Fri, 21 Mar 2025 15:31:25 +0200
Message-Id: <86h63mldci.fsf@HIDDEN>
From: Eli Zaretskii <eliz@HIDDEN>
To: Mattias Roux <mattias@HIDDEN>
In-Reply-To: <0190d5fa-50bf-462d-9b30-27c796a79b66@HIDDEN> (message from
Mattias Roux on Fri, 21 Mar 2025 13:41:57 +0100)
Subject: Re: bug#77151: 31.0.50; >>= is not rendered
References: <0190d5fa-50bf-462d-9b30-27c796a79b66@HIDDEN>
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> Date: Fri, 21 Mar 2025 13:41:57 +0100
> From: Mattias Roux <mattias@HIDDEN>
>
> Hi,
>
> From emacs -Q you can evaluate the following code:
>
> (require 'package)
> (add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/"))
> (package-initialize)
>
> (set-face-font 'default "Fira Code")
>
> (use-package ligature
> :ensure t
> :config
> ;; Enable the "www" ligature in every possible major mode
> (ligature-set-ligatures 't '("www"))
> ;; Enable traditional ligature support in eww-mode, if the
> ;; `variable-pitch' face supports it
> (ligature-set-ligatures 'eww-mode '("ff" "fi" "ffi"))
> ;; Enable all Fira Code ligatures in programming modes
> (ligature-set-ligatures 'prog-mode '((">" (rx (+ (or ">" "<" "|" "/" ":"
> "=" "-"))))))
> ;; Enables ligature checks globally in all buffers. You can also do it
> ;; per mode with `ligature-mode'.
> (global-ligature-mode t)
> (message "`ligature' loaded"))
>
> Now, if you open /tmp/test.el and write >>=, it won't be rendered, but
> if you add any character (like = or :) it will.
>
> I also tested it with emacs 30.1
Thanks, but did you report this to the developers of the "ligature"
package first? If so, what did they say to indicate that this problem
is in Emacs and not in the package?
If you haven't reported this to the package developers yet, please do,
since the package is not part of Emacs.
bug-gnu-emacs@HIDDEN:bug#77151; Package emacs.
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Subject: 31.0.50; >>= is not rendered
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Hi,
From emacs -Q you can evaluate the following code:
(require 'package)
(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/"))
(package-initialize)
(set-face-font 'default "Fira Code")
(use-package ligature
:ensure t
:config
;; Enable the "www" ligature in every possible major mode
(ligature-set-ligatures 't '("www"))
;; Enable traditional ligature support in eww-mode, if the
;; `variable-pitch' face supports it
(ligature-set-ligatures 'eww-mode '("ff" "fi" "ffi"))
;; Enable all Fira Code ligatures in programming modes
(ligature-set-ligatures 'prog-mode '((">" (rx (+ (or ">" "<" "|" "/" ":"
"=" "-"))))))
;; Enables ligature checks globally in all buffers. You can also do it
;; per mode with `ligature-mode'.
(global-ligature-mode t)
(message "`ligature' loaded"))
Now, if you open /tmp/test.el and write >>=, it won't be rendered, but
if you add any character (like = or :) it will.
I also tested it with emacs 30.1
Mattias
In GNU Emacs 31.0.50 (build 3, x86_64-pc-linux-gnu, GTK+ Version
3.24.43, cairo version 1.18.2) of 2025-03-17 built on mattias-pc
Repository revision: d708ebe401a2001e764821b7e43d9e9aaa23ea95
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12401006
System Description: Nobara Linux 41 (KDE Plasma)
Configured using:
'configure --with-native-compilation --with-native-image-api
--with-modules --with-harfbuzz --without-compress-install
--with-threads --with-included-regex --with-x-toolkit=gtk3 --with-zlib
--with-jpeg --with-png --with-imagemagick --with-tiff --with-xpm
--with-gnutls --with-xft --with-xml2 --with-mailutils
--with-tree-sitter 'CFLAGS=-march=native -mtune=native -O2 -g3''
Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ
IMAGEMAGICK JPEG LIBSELINUX LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY
PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS
TREE_SITTER WEBP X11 XDBE XIM XINERAMA XINPUT2 XPM XRANDR GTK3 ZLIB
Important settings:
value of $LC_COLLATE: C
value of $LC_CTYPE: en_US.UTF-8
value of $LC_MESSAGES: C
value of $LC_MONETARY: en_US.UTF-8
value of $LC_NUMERIC: en_US.UTF-8
value of $LC_TIME: en_US.UTF-8
value of $LANG: en_US.UTF-8
locale-coding-system: utf-8-unix
Major mode: Elisp/d
Minor modes in effect:
global-ligature-mode: t
ligature-mode: t
tooltip-mode: t
global-eldoc-mode: t
eldoc-mode: t
show-paren-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
tool-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
minibuffer-regexp-mode: t
line-number-mode: t
indent-tabs-mode: t
transient-mark-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
Load-path shadows:
None found.
Features:
(shadow sort mail-extr emacsbug lisp-mnt message yank-media puny dired
dired-loaddefs rfc822 mml mml-sec epa derived epg rfc6068 epg-config
gnus-util time-date mm-decode mm-bodies mm-encode mail-parse rfc2231
mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums
mm-util mail-prsvr mail-utils project ffap thingatpt compile
text-property-search comint ansi-osc ansi-color ring comp-run
comp-common rx ligature cl-extra help-mode use-package-ensure
use-package-core finder-inf ligature-autoloads package browse-url xdg
url url-proxy url-privacy url-expand url-methods url-history url-cookie
generate-lisp-file url-domsuf url-util mailcap url-handlers url-parse
auth-source cl-seq eieio eieio-core cl-macs icons password-cache json
subr-x map byte-opt gv bytecomp byte-compile url-vars cl-loaddefs cl-lib
rmc iso-transl tooltip cconv eldoc paren electric uniquify ediff-hook
vc-hooks lisp-float-type elisp-mode mwheel term/x-win x-win
term/common-win x-dnd touch-screen tool-bar dnd fontset image regexp-opt
fringe tabulated-list replace newcomment text-mode lisp-mode prog-mode
register page tab-bar menu-bar rfn-eshadow isearch easymenu timer select
scroll-bar mouse jit-lock font-lock syntax font-core term/tty-colors
frame minibuffer nadvice seq simple cl-generic indonesian philippine
cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
european ethiopic indian cyrillic chinese composite emoji-zwj charscript
charprop case-table epa-hook jka-cmpr-hook help abbrev obarray oclosure
cl-preloaded button loaddefs theme-loaddefs faces cus-face macroexp
files window text-properties overlay sha1 md5 base64 format env
code-pages mule custom widget keymap hashtable-print-readable backquote
threads dbusbind inotify dynamic-setting system-font-setting
font-render-setting cairo gtk x-toolkit xinput2 x multi-tty move-toolbar
make-network-process tty-child-frames native-compile emacs)
Memory information:
((conses 16 358461 16820) (symbols 48 15746 0)
(strings 32 118471 3297) (string-bytes 1 2943828) (vectors 16 35327)
(vector-slots 8 378479 10339) (floats 8 59 1) (intervals 56 571 0)
(buffers 992 13))
Mattias Roux <mattias@HIDDEN>:bug-gnu-emacs@HIDDEN.
Full text available.bug-gnu-emacs@HIDDEN:bug#77151; Package emacs.
Full text available.
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