DMARC-Filter:	OpenDMARC Filter v1.4.2 delorie.com 611H94rM2520204
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 611H94rM2520204
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=doW51Qf5
X-Recipient:	archive-cygwin AT delorie DOT com
DKIM-Filter:	OpenDKIM Filter v2.11.0 sourceware.org B13144BB58B1
DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com;
	s=default; t=1769965743;
	bh=/9F2HMMluIm8xz6E8l/u4gl3elwT0TViq9caPgb1+wo=;
	h=Date:Subject:To:References:Cc:In-Reply-To:List-Id:
	List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe:
	From:Reply-To:From;
	b=doW51Qf5I5LGf9EtnTglbmGsTnHAqAXY5EYh30O6SD+KNE1DSCBWSVxUxQM7XS/Re
	zrGewaDHcwu50HrDq0AMRdxcHekcgu+AS6jDxo3ydyNlFfrfwAVGWpPHogVnDbdxXm
	kxghzS54IyrLotKfbnpqpzAC9CS8FPwjT1svh1Og=
X-Original-To:	cygwin AT cygwin DOT com
Delivered-To:	cygwin AT cygwin DOT com
DMARC-Filter:	OpenDMARC Filter v1.4.2 sourceware.org 201A94BAD17F
ARC-Filter:	OpenARC Filter v1.0.0 sourceware.org 201A94BAD17F
ARC-Seal:	i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1769965695; cv=none;
	b=sWxw7YxUqi7glz22AAbiwqXdReBtJn3YsPtAHngSTd57flBhDJYGaHrBaUUrRhcwX37ACPHHnWG3kwM611oUTtrdRHYTUsMTz0V813V7FpOxQN2I5Y3g/WgrvuPAVi1xwn5lHPmIRG48dxPruc3zNf3EOTeyZVsdARPs8tjGalw=
ARC-Message-Signature:	i=1; a=rsa-sha256; d=sourceware.org; s=key;
	t=1769965695; c=relaxed/simple;
	bh=XT1q8/1q3W3fOzt+1ANAmkZNzQHF/gq5MmJqzSB2TSo=;
	h=Message-ID:Date:MIME-Version:Subject:To:From;
	b=NB7G5AyqISeKSn5/OZGAM1EmZH8IaTFhuxEe9Y2VKXn5bOaFd+dagUy4y42X+oY5gAe6fxKsycEOKO+wGQHchwvuEVv3KqYOA0+1EeH6HfZmOyBi2wTgQwpLZ8YknXRUKmL2xLlA0oR8QFIcBkkOxs/5Avjjc4fjJnP48pJ7cWE=
ARC-Authentication-Results:	i=1; server2.sourceware.org
DKIM-Filter:	OpenDKIM Filter v2.11.0 sourceware.org 201A94BAD17F
X-SNCR-Rigid:	693FF8BE047EF994
X-Originating-IP:	[81.158.20.185]
X-OWM-Source-IP:	81.158.20.185
X-OWM-Env-Sender:	jon DOT turney AT dronecode DOT org DOT uk
X-RazorGate-Vade:	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
X-RazorGate-Vade-Verdict:	clean 0
X-RazorGate-Vade-Classification:	clean
X-VadeSecure-score:	verdict=clean score=0/300, class=clean
Message-ID:	<fc1bdd5b-7732-4430-a130-70ef662acd36@dronecode.org.uk>
Date:	Sun, 1 Feb 2026 17:08:11 +0000
MIME-Version:	1.0
User-Agent:	Mozilla Thunderbird
Subject:	Re: git fsck complains about error:
	refs/tags/.cyg000000000559e25517156b51cf219f51/libgcj-2.95.0: badRefName:
	invalid refname format?!
To:	Dan Shelton <dan DOT f DOT shelton AT gmail DOT com>, cygwin AT cygwin DOT com
References:	<CAAvCNcDzoq3skCwRuYa2LLTTA3xsnK+eDLB8_SegJZinatMUSg AT mail DOT gmail DOT com>
Cc:	cygwin AT cygwin DOT com
In-Reply-To:	<CAAvCNcDzoq3skCwRuYa2LLTTA3xsnK+eDLB8_SegJZinatMUSg@mail.gmail.com>
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:	Jon Turney via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Jon Turney <jon DOT turney AT dronecode DOT org DOT uk>
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>

On 31/01/2026 18:42, Dan Shelton via Cygwin wrote:
> Hello, on Cygwin 3.6.6-1.x86_64 on CYGWIN_NT-10.0-19045/Win10 I get
> these errors from git fsck when working on a clean clone of the
> gcc.git repro:
> 
> git fsck
> error: refs/tags/.cyg000000000559e25517156b51cf219f51/libgcj-2.95.1:
> badRefName: invalid refname format
> error: refs/tags/.cyg000000000559e25517156b51cf219f51/libgcj-2.95.0:
> badRefName: invalid refname format
> error: refs/tags/.cyg000000000559e25817156b51cf219f51/libf2c-0.5.22:
> badRefName: invalid refname format
> error: refs/tags/.cyg000000000559e25817156b51cf219f51/libf2c-0.5.21:
> badRefName: invalid refname format
> 
> git fsck then exits with error code 8, breaking our scripts.
> 
> Is this a Cygwin bug or feature running wild?
Yes.

These .cygXXX files are made by the cygwin DLL (I think it's something 
like a hardlink to the running executable so we can fork even if it's 
deleted, but I might well be misremembering the details) and are 
supposed to get automatically removed.

Obviously, 'git fsck' objects to their presence, but it is safe to 
remove them.


-- 
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 -