DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:to:from:subject:date:message-id:mime-version
	:content-type:content-transfer-encoding; q=dns; s=default; b=H9K
	/gpprmrqnD3Ru1ULoXEnGW6TrQ4/jzuHOCHUImUD2umuUoCTfUpOOq6MzWNaxarK
	CbD0XEj2LbrQko/zY5uIF38yVb+7aNqFgaoHxRc3yfgg5F8ULpnMrtAg2hoJ4tZa
	K6VW3t+Nw1rtol2D7otM3d/AP26zW0D9SK7wrdGA=
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
To: cygwin AT cygwin DOT com
From: Mark Levedahl <mlevedahl AT gmail DOT com>
Subject: regex library fails git tests
Date: Sat, 20 Jul 2013 15:52:02 -0400
Lines: 50
Message-ID: <ksepor$cag$1@ger.gmane.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130625 Thunderbird/17.0.7

Current git fails two sets of tests on cygwin due apparently to problems 
in the regex library. One set of tests does language based 
word-matching, and has a common failure during regex compilation. The 
suffix clause ("|[^[:space:]]|[\xc0-\xff][\x80-\xbf]+") is common to all 
of these, removing that clause eliminates the regcomp failure.

A test case extracted from the git sources is below - this works 
correctly on Fedora 18, fails on Cygwin:

$ gcc test-regex.c
$ ./a.out
failed regcomp() for pattern '[^<>=     ]+|[^[:space:]]|[▒-▒][▒-▒]+'

The failure disappears when the suffix clause is removed from pat_html.

This is happening on a current installation:
$ uname -a
CYGWIN_NT-5.1 virt-winxp 1.7.21(0.267/5/3) 2013-07-15 12:17 i686 Cygwin
$ cygcheck -c gcc-core gcc-g++
Cygwin Package Information
Package              Version        Status
gcc-core             4.7.3-1        OK
gcc-g++              4.7.3-1        OK

------------

#include <regex.h>
#include <stdio.h>

int main(int argc, char **argv)
{
	char *pat_html = "[^<>= \t]+"
		"|[^[:space:]]|[\xc0-\xff][\x80-\xbf]+";
	char *str = "={}\nfred";
	regex_t r;
	regmatch_t m[1];

	if (regcomp(&r, pat_html, REG_EXTENDED | REG_NEWLINE)) {
		printf("failed regcomp() for pattern '%s'\n", pat_html);
		return 1;
	}
	if (regexec(&r, str, 1, m, 0)) {
		printf("no match of pattern '%s' to string '%s'\n",
			   pat_html, str);
		return 1;
	}
	return 0;
}

Mark


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