It's there a pitfall in boost::regex?

From: Phipps Xue (xuejm_at_[hidden])
Date: 2003-04-16 21:59:57

Good morning all,

I used regex library which is shipped with boost 1.30 in my project. But
I found in the case I list below, the regex_match() will crash. Is there
a pitfall in it?

===================== CODE LIST BEGIN =========================
#include "stdafx.h"
#include <afxconv.h>
#include <boost/regex.hpp>
using namespace boost;

void do_regex_match(const string& s)
{
        USES_CONVERSION;
        
        CString _c1,_c2;	
        _c1 = "\\_gl_glcf]a:(D_N~yOA_gg_aeN_o/>jm_gf'0(m_--\\6L_gi_AE_gd5<&0A~_E'_Y-'-,uO7_so_glTc G_gl_C,_o/*6hC=@_u"; // Failed
        _c2 = "\\_gl_glcf]a:(D_N~yOA_gg_aeN_o/jm_gf'0(m_--\\6L_gi_AE_gd5<&0A~_E'_Y-'-,uO7_so_glTc G_gl_C,_o/*6hC=@_u"; // Passed  
        
        wstring ws1(L""),ws2(L"");
        ws1=A2W(_c1);
        ws2=A2W(_c2);
        
        wstring wsMatchString(L"");
        wsMatchString=A2W(".*(Òª)?.*ÌìÆø.*"); 

        boost::wregex e(wsMatchString/*,boost::regbase::normal|boost::regbase::icase*/);
        boost::regex_match(ws2,e);// Pass
        boost::regex_match(ws1,e);// Crash
}
======================== CODE LIST END =========================
As you can see in the code, if any change is made to _c1, the test will
pass or it will crash. I will list my compiler and system information
below.

Compiler: Microsoft Visual C++ 6.0 Professionall with SP5
OS: Microsoft Windows 2000 Professional with SP3
RAM: 512M
CPU: PIII 700

Any help will be appreciated.

Phipps Xue 

Software Engineer, MCP/MCSD
Email: xuejm_at_[hidden]