Почему для регулярного выражения Boost закончилось пространство стека?

#include <boost/regex.hpp>
#include <string>
#include <iostream>

using namespace boost;
static const regex regexp(
        "std::vector<"
            "(std::map<"
                   "(std::pair<((\\w+)(::)?)+, (\\w+)>,?)+"
             ">,?)+"
        ">");

std::string errorMsg =
"std::vector<"
        "std::map<"
                "std::pair<Test::Test, int>,"
                "std::pair<Test::Test, int>,"
                "std::pair<Test::Test, int>"
        ">,"
        "std::map<"
                "std::pair<Test::Test, int>,"
                "std::pair<Test::Test, int>,"
                "std::pair<Test::Test, int>"
        ">"
">";
int main()
{
    smatch result;
    if(regex_match(errorMsg, result, regexp))
    {  
        for (unsigned i = 0; i < result.size(); ++i)
        {  
            std::cout << result[i] << std::endl;
        }
    }

//    std::cout << errorMsg << std::endl;

    return 0;
}

это дает:

terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<std::runtime_error>
>'   what():  Ran out of stack space trying to match the regular expression.

скомпилировано с

g++ regex.cc -lboost_regex

EDIT

моя платформа:

g++ (Ubuntu/Linaro 4.4.4-14ubuntu5) 4.4.5
libboost-regex1.42
Intel(R) Core(TM)2 Quad CPU Q9400 @ 2.66GHz
So the latest Ubuntu 64 bit