DMARC-Filter:	OpenDMARC Filter v1.4.2 delorie.com 58U6jQJW2727950
Authentication-Results:	delorie.com; dmarc=pass (p=none dis=none) header.from=cygwin.com
Authentication-Results:	delorie.com; spf=pass smtp.mailfrom=cygwin.com
DKIM-Filter:	OpenDKIM Filter v2.11.0 delorie.com 58U6jQJW2727950
Authentication-Results:	delorie.com;
	dkim=pass (1024-bit key, unprotected) header.d=cygwin.com header.i=@cygwin.com header.a=rsa-sha256 header.s=default header.b=fypwIwDJ
X-Recipient:	archive-cygwin AT delorie DOT com
DKIM-Filter:	OpenDKIM Filter v2.11.0 sourceware.org F30533858CDA
DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com;
	s=default; t=1759214726;
	bh=XI4uJg4vol9N9MfVoEcEzpsfZdFO95cKe7Zg70HHn8s=;
	h=Date:Subject:To:References:In-Reply-To:List-Id:List-Unsubscribe:
	List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:
	From;
	b=fypwIwDJjEa7N9E6J2sI8zmbYvS2kWHRm1sqeGsm9wWrKZJTExwWst0w+Mvoy4+da
	e/rVuHDpzf/cZs3Nfo3a2Mfr9Gc//SvhK30JbWM36w4DwE++2jDknAeuSfPJ+ICWcl
	UYN177TmYfzysXXgVthfHtBZwqkoJV1Ch+f6cl0A=
X-Original-To:	cygwin AT cygwin DOT com
Delivered-To:	cygwin AT cygwin DOT com
DMARC-Filter:	OpenDMARC Filter v1.4.2 sourceware.org 18D103858D1E
ARC-Filter:	OpenARC Filter v1.0.0 sourceware.org 18D103858D1E
ARC-Seal:	i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1759214664; cv=none;
	b=SwZ9aeElbAFPpAOVXPq3D4c4wN2+Um/JehnYA8P/GIMn3E6DQJWl7eeP3k96CQRSzddabmrsNweT+KjeHvLiQhkqN6tJyMHFgiciGmTeqUF/wkszwCAsh6iC+dEpQ9OjGOQL5SgwlLxtWrXLV96U9Sgvu7XH5vMzHI4SleoDVnw=
ARC-Message-Signature:	i=1; a=rsa-sha256; d=sourceware.org; s=key;
	t=1759214664; c=relaxed/simple;
	bh=G4amj7FvbDF36hBP1OcdGfP8VJPLzhIJ8vCvJDjbRj4=;
	h=DKIM-Signature:Message-ID:Date:MIME-Version:Subject:To:From;
	b=C/2HSBHIyy+FCuvScJG3XA1+pEAWUc0Vsn3GKMlCQp3eJqMkxr22q86W0I41Gr0YnpyzmYTPfsCs8HVCU2RElfO80N+mYyYZhmcmNIE9P3gtWito7tGIVFvrdh0H8INXkBl04hX17kGqcrmMewlQ2RPXtcbKfFepjNgrlCktQBo=
ARC-Authentication-Results:	i=1; server2.sourceware.org
DKIM-Filter:	OpenDKIM Filter v2.11.0 sourceware.org 18D103858D1E
X-UI-Sender-Class:	55c96926-9e95-11ee-ae09-1f7a4046a0f6
Message-ID:	<b533e91d-5e91-4fd3-8ea1-c1ac0b257485@towo.net>
Date:	Tue, 30 Sep 2025 08:44:49 +0200
MIME-Version:	1.0
User-Agent:	Mozilla Thunderbird
Subject:	Re: cygwin 3.6.4 breaks mbrtowc
To:	cygwin AT cygwin DOT com
References:	<de316655-6d48-43fe-8a53-bc459f5d2de1 AT towo DOT net>
	<a985ce12-d9a0-4eaa-9ccd-85cffdf15994 AT maxrnd DOT com>
Autocrypt:	addr=towo AT towo DOT net; keydata=
	xsDNBGNaf3QBDACVevqudcTSevLThXKQPU1QpaDxtGuYjtwmr7i9wXxVGih4Y4oxOJN4PYlu
	KBX9IVAI4651dA+xYtXuyIkWOPZWyyzkGKavQOn3Q7dk09oj7bh2IwOndpxXXde337D408EQ
	bQEGbMHr9lOWhSAideowzgCeFIvGTf2AovbPh97HpexJn1/HCRiRAhTNlrkS1DByUgCAeEMK
	fEr6aGM/Ou29MT+eTnQwOIZTnl9Z9LxM2FtqqMH3MycC7I2OoW3XXhuL8BPQdyJUjWa0/J11
	Oo5jFkRXtWenIns6jGn18oW72jnDmo9jXwwS+iZWAV6Y51nhD7jSC+3xs9ORmPCdtHUSpTr1
	zh67UueUJ3DUUNVuA25Hn/9EJMJ2L60BGUEr88NEB6pcZhmcwdkurAQeYT6t+frzBz2ctsoN
	BoxP/Xc02yd+z7hXWRRMrJWh9WHlQHA3Z4FfmyNhyPhs3MgKTJ1E9QfzGquigAmF3/k/Dc1m
	7cSOKhGYhpEJdSpdXccJFKkAEQEAAc0cVGhvbWFzIFdvbGZmIDx0b3dvQHRvd28ubmV0PsLB
	BwQTAQgAMRYhBHUiRKsHn5d8BpWdP8bz0e72Bp0CBQJjWn93AhsDBAsJCAcFFQgJCgsFFgID
	AQAACgkQxvPR7vYGnQKSMAv8Di+8MXB2mcfsemRdShfLLKcLOv+d0CXAtPVaY3XKxbKpRvC9
	+AAT5wIHYjQft77/b2y87vGIh+nQ5hKLtNtQPSDtqG/Igkb5jAXpLi28fSUzgM96DvARmwve
	5wSnAU3prxH+Y63YpOpslEcGMRoEtYCDy1ANMYPcEZT/YvDd4CplyyEai4VYrw3/LsESDYlY
	GK6uMQzZ1jl2cNOUFu6BwLUeZIcwaqGto8n4R4nbf4jxUEpa21bWBPqE+Jf49uipjPr/iJ72
	5HbdWuuCfyTTJEJjfNEBigWP2RXM9iNDcO61V3aEjh76tThfBK2MMlLWfZkQaQziu24x8R4B
	I0efJYWBX2Sv2qnsH/EWj7FUIZjRqGG7LnWHLShfG6yjSOTOWYi8BbsvoftpaLWgZX28aGX4
	uzuSZ5L0caXh/pr/gSgqoH/YbuFIgqtQH4seOBgTybd22Vpe78rnc+8450pN8qwchHAZaJka
	UxS0SpYxXzXmHUKILA4C43s0U/z2Mez9zsDNBGNaf3cBDADeJ7paMrb6f1+k8wM7tyk0/Ded
	KX/pOejt/D20Ceerw2iL/4tUmBL+A3ic2yjiSFUSsEfHwgCVwKrn4MwZtkesdiphm2lk6xWc
	k1ENCQy44QwQT6UZ/mHWYWcj5LS6ua183x1zdn9iF3lv150nm/ssw56D7USz/ap1Vh0lf5te
	D+CIheGLocVDqxWiu7rHP8jKRWFgq/+OU6HKX8p2Yv1oYsykh9qF2bFzawLDS+S1VbfRicfD
	G0RtceL/BAf7b6UE5u9TGdfrFEa2TKZeS/FS/ViKUfwsXQIki1sWt2FQENbuDY28vxyR46ZZ
	0gixDCFUoBw5pkmOGVQa+1RQYrRqlN4X0CAgp7mFVeEHl5NTgiL1bemkQVmHOUDG+CzNg+Lk
	UGoedAtT672l3JjrnSs4j8zNshpgV2OfAhAC+V9XvqCjMnxzVfXkVlbuWpPfUWQeFclLGg8P
	agpQUE0Ux+VV4DoeQCxYEnRCf/n7n+IRfILj5+2l6Zw4M7zSu6ii0tUAEQEAAcLA9gQYAQgA
	IBYhBHUiRKsHn5d8BpWdP8bz0e72Bp0CBQJjWn97AhsMAAoJEMbz0e72Bp0CQr4L/REdT0SF
	mbapnZIe92THCdtAUgwEv8VdNiNFBJelz8P/fuXuNPtisYvQQD4e64zpWe2UC4Cxo9DUk/pW
	6Qci1xaXRKEiSPjHdSGGVB1PFIcqiS75GCf/ga/Dnfsy0Y4Uh6OGTQnkvZLBCe3vvcVLDQ7F
	PuV79zA9/eOeOW6aGoO6bq/wH+z96f9LyTITkQDy07fm6JYTGuzAoJE2AEboU1mgbtlx+tAa
	QFkpAQkp2g1Vhc3A7k4vntlHOrjMC+uVFh7QTGFfIlLRF6izUjSe6EZ06LErzlIiE05RP3yF
	FSRWidW0wze26peYlxYVgH1+T9wMTW2oiTBybfAMHBAxUP7Gr1WUo/oJEr0srWhatz8AwydP
	y7NwFbdpYn0NcFBaIlLW/JL11Eovwlivow+oGpzGFuuzSuflp2q9s2JWtn4EhW0kEs93D0LP
	iuJWvRaCZ6aD3uF3FMW8wyVWZYsLrzune2jH8w/uKMprDEOGOm+BcyhEFedTyY1ygbZKl+0G kQ==
In-Reply-To:	<a985ce12-d9a0-4eaa-9ccd-85cffdf15994@maxrnd.com>
X-Provags-ID:	V03:K1:rW8y9XiIaSnnEkffv1heSmDL2xgOvmJJOOyaLBmJC2CvjhBJpcY
	N+S/LkjG01ALt+Fgxp9bC13FXtl9w9mBXbVwkZnl9HoyDF9nzAM6/qQa8qbkwcjbYH7yn4h
	ntZX3nTLBZ0mo4Ao65kRpc29N1ho1CxgnbY09pn0WOqwcpYKbpd5VjDaIELbHQ1PDU/AslS
	dy26xSodAaszQOCWBNMAA==
UI-OutboundReport:	notjunk:1;M01:P0:fMzi/HQLFMM=;+36iNkRD1HIJackBWwcHuBrsSnG
	svhVpcAtKKi39f8YQAk+8tvEM9ZfAII88pvMElvIzINDH+dAVqeqCNqGDiSz1nFj+hMOhMt3x
	AWYBWYMTp7SLO81zfjuAwI57twx3QWbFYSMm2wN1IiY81QvKTOcHi0O63/oKdDZKcF0/X6Q6v
	KKB92k2T/2/WY1FjALdapSxzKmPz7XCGeMhEumU88jr5pR57G7BeY4XyVPdsjqO5nsXIdzeoF
	dJVlxfnRgQ06Z9FvDELF41ghiUSO0r2OouUruqz+tt46976+K6LpYnfccMnN6HP2RY3+Apyno
	vF8wHGwkLDf0rMeoA20jwZmDf25xORP3w3cYVo4WUHDmp1x4tDK19Z+/sD/WlbvLNgUioGaTL
	TN9SF2WmXZjUNYnnCkOZI9/WR0/gQjHX99Wk9yV2B9FNdC6E/sGaD9dDI6FiloPidlu6TcuT8
	xcvDwdJGaxblZA21WxYml76fBv/Z80/S4rNMWVaBbNGTZ4EzwYgr87U2Fjl4PvH5FXuaYwbRx
	KqKd7RFrCxMyqUSSIkQTHgol9l0mfanJ4R3Z1WNTtP7OQLLrU+/yUQ/cJSvpDEt8rQgOFvaOH
	itHsN1d9Yr2Ydf7J+dbVhw73mAaPPATeOcDZ6J1CoR59fZ/NlYmCjG+3FGcLbM5egMd5pUd26
	2Mb01uPBqhASiehXM+Tk67euD2U1mMzTYaSMyrf+rb+nSk3V6WCoAptTNNAMEXT/JxLfOjST2
	LCZ7L0WIZdbRQSFGlCFW9isJCVCY3AEeRbVMK08iVh61boCxrYrVSlQDy1TbiCcSDwTWoGWzQ
	Klvm67mV7exbQ6IdEh3NezcYB4pTDZ8WZ8C0Wqi2pK9Ez8CYXopKdHxMXP9Fi3QVMM+/NUSds
	OuBAeeVjIILYKRAaJHg/a9ncKMKRMTBK7C4Mp6wrhg4I6bslQPyymctm1obqlCyFRtLKH9qFM
	BBbIylqoBImLzpNgMHEyAU/5JrrOcuICaSpZOo7StnjP6+g6WthAFe6ljbYYEWrLB8LiHF6JP
	Za2RJBapIFUO+Z7bc1DwGnAAOuESD0ZzvtcrVIVPPSaMsW8Xwc1rKrLQwpdQZ6632TnJ5z/Vg
	Mh1VRpN9q9SqZft/9ZUaAzku/MdAKkjj5II2WqgijG/e/6ktqaQ5NajPJFP1+3GgIzypONJTJ
	Jm4ftO31rDuNiIauNPd5lu5tv/4j+VxKf11eV6VuMLlJM+EtakYhQt3FRKcnAhgCbKJnYBrkR
	zFFxK2DAqeEyyQSGcJtsTjMV9StNTQkEuv7cMT06rK6tI64ggcDUHi4GT0yI7rz28Ay84B1GU
	6TxatVd3O/SYifneXpK9BmECJUmF0PFxF9AxWB17aFN+qaYTXPo1pQ2KFk5JT3p5tJOxqucTM
	mjT69UDksS3EAEobrwHAVDBbWYgTH46262tyYoH2zsQepLIX1TA7JcQ88wK9YILdUaUyV7o6/
	WI1k8m0POfseBctIdIvWfPiS8VGBaDRk8LXDREkAkeoGMVbFBpBClUGZVuDn4RFCrO2siwSaT
	LgB+40dRKKnrvPNgI/4XOQj3Mz+Myd5YeWo2CL1Kc5cLtbUyRR4Mnwl1EiMxgZqUME6V5j+Rg
	JhPQ1MTN+0v1R+Et4wE+eh69rOdbT/Pu4OX24PSW/+O22l5Q2+GPdbtuh3pbPJ42ytPZXkHtV
	s=
X-BeenThere:	cygwin AT cygwin DOT com
X-Mailman-Version:	2.1.30
List-Id:	General Cygwin discussions and problem reports <cygwin.cygwin.com>
List-Unsubscribe:	<https://cygwin.com/mailman/options/cygwin>,
	<mailto:cygwin-request AT cygwin DOT com?subject=unsubscribe>
List-Archive:	<https://cygwin.com/pipermail/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-request AT cygwin DOT com?subject=help>
List-Subscribe:	<https://cygwin.com/mailman/listinfo/cygwin>,
	<mailto:cygwin-request AT cygwin DOT com?subject=subscribe>
From:	Thomas Wolff via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Thomas Wolff <towo AT towo DOT net>
Errors-To:	cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com
Sender:	"Cygwin" <cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com>
X-MIME-Autoconverted:	from base64 to 8bit by delorie.com id 58U6jQJW2727950

Am 30.09.2025 um 00:52 schrieb Mark Geisert via Cygwin:
> Hello Thomas,
> Apologies for the late response to your report.
Thanks, I actually had feedback on the issue. From Corinna in another 
thread I guess.
>
> On 7/21/2025 8:25 PM, Thomas Wolff via Cygwin wrote:
>> mbrtowc is broken in 3.6.4 which breaks non-BMP display in mintty.
>> Test case below.
>> Thomas
>>
>> #include <locale.h>
>> #include <wchar.h>
>> #include <stdio.h>
>>
>> void mb(unsigned char c)
>> {
>>    wchar_t wc;
>>    int ret = mbrtowc(&wc, &c, 1, 0);
>>    printf("%02X -> %04X : %d\n", c, wc, ret);
>> }
>>
>> void main ()
>> {
>>    setlocale (LC_CTYPE, "");
>>
>>    mb(0xF0);
>>    mb(0x9F);
>>    mb(0x98);
>>    mb(0x8E);
>> }
>
> Running your testcase gives different output between 3.6.4 and 
> 3.7.0-dev-139 but I'm unsure the latter is correct.  Can you comment 
> please?
The issue was fixed soon already and it works in 3.7.0 test releases.
Furthermore, mintty 3.8.1 has a workaround for it so it works also in 
3.6.4, but only for UTF-8 encoding, not for CJK multibyte encodings 
where the issue also hits.

>
> On 3.6.4:
> ~ ./a
> F0 -> 0000 : -2
> 9F -> 0000 : -2
> 98 -> 0000 : -2
> 8E -> D83D : 3
>
> On 3.7.0-dev-139:
> ~ ./a
> F0 -> 0000 : -2
> 9F -> 0000 : -2
> 98 -> D83D : 1
> 8E -> DE0E : 1
>
> Thanks much,
>
> ..mark
>


-- 
Problem reports:      https://cygwin.com/problems.html
FAQ:                  https://cygwin.com/faq/
Documentation:        https://cygwin.com/docs.html
Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple

- Raw text -