From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#73752: 29.4; Ligatures are randomly rendered with extra spaces Date: Thu, 31 Oct 2024 11:43:58 +0200 Message-ID: <86v7x838v5.fsf@gnu.org> References: <91cb4d5a6c979bf096ca9fa26711395ab29b941b.camel@timruffing.de> <86wmhp4obi.fsf@gnu.org> <86msil4mpn.fsf@gnu.org> <8f02b0490d2abb0889b760fb80c3ec492c63c784.camel@timruffing.de> <86ed3x4h7m.fsf@gnu.org> <87zfmky9m1.fsf@gmail.com> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="24266"; mail-complaints-to="usenet@ciao.gmane.io" Cc: dev@real-or-random.org, xuan@xlk.me, 73752@debbugs.gnu.org To: Visuwesh Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu Oct 31 10:45:17 2024 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1t6Rjw-00063J-Pg for geb-bug-gnu-emacs@m.gmane-mx.org; 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Thu, 31 Oct 2024 05:44:07 -0400 Original-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 ) id 1t6Rij-0008TC-2Y; Thu, 31 Oct 2024 05:44:01 -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=uNqtKc6/5KqMK4owg4bxNo+4MEa9IXqhuYSKXMFcoR8=; b=K4NLoyQqa+wI 9JlTOx3Fc7ZPB5+PxrRrz+Frh51M8aLiammbtYrGobTC+R4cNCHMHHaxSQCHJd8s/evMKVey2oqIs HAzKEeACCzHsMY2lHtufYwZ9/QFUWZ5eiw8t4f1DBa1gri1i2eTYiIdm721X+cAh83nB/2ZQOk/tB dURdMqgEUqykYWt7n81CmNMrtEZKd76ZDLVfagS59eSA9xVzXKPh1P47KhnI78j98F8G5q57LZSM0 mk7Z6HzH3UjL9EGiGimb+I4GdIuyGwSQO91T1xPpNo1gk1e6kpBkE+cKG5MT+8H4nvsEak7wlDTRP 7bTMlgKGU/V44JGBcNnVHw==; In-Reply-To: <87zfmky9m1.fsf@gmail.com> (message from Visuwesh on Thu, 31 Oct 2024 13:42:06 +0530) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:294599 Archived-At: > From: Visuwesh > Cc: Tim Ruffing , 73752@debbugs.gnu.org, xuan@xlk.me > Date: Thu, 31 Oct 2024 13:42:06 +0530 > > > Did the "bad" display start from "good" at the beginning of a session? > > Or did it start from "bad" to begin with? If the former, the next > > idea is to put a watchpoint on the cached composition in a session > > with "good" display, and then do whatever it takes to make it "bad", > > hoping that the watchpoint will break at some point and show us the > > code which replaces nil with these [X-OFF Y-OFF WADJUST] vectors. > > I think it starts from "bad" to begin with. But the former theory could > still apply, if you do not mind this vague answer, can you provide > instructions to set a watchpoint? If the watchpoint never triggers, we > might be able to at least rule out the former theory. Let's first see if a breakpoint inside composition_gstring_adjust_zero_width ever breaks in your cases. If it doesn't we will try the watchpoint technique.