[xpressive] I got a crash in after i upgrade from 1.44 to 1.74

From: forston_shi_at_[hidden]
Date: 2020-11-20 09:08:49

Hi Boost Users

I met a crash in following code after I upgrade from 1.44 to 1.74,

When I used "-O1 -DNDEBUG" to compile, it will crash.
But when  I used "-O1" or "-DNDEBUG" or "-O0 -DNDEBUG", it will not crash.
In 1.44, all of them are ok.

My GCC version is 4.1.2 and test in redhat-AS 4 32 bit.

callstack
#0 at ./boost_1_74_0_bk/boost/xpressive/detail/static/transmogrify.hpp:160
160                 char const *name_end = m.name_ + std::strlen(m.name_);
#1  at ./boost_1_74_0_bk/boost/proto/transform/detail/preprocessed/fold_impl.hpp:80
#2  at ./boost_1_74_0_bk/boost/proto/transform/detail/preprocessed/fold_impl.hpp:80
#3  at ./boost_1_74_0_bk/boost/xpressive/detail/static/compile.hpp:79
#4  at ./boost_1_74_0_bk/boost/xpressive/detail/static/compile.hpp:99
#5  0x08049d5f in main () at ./boost_1_74_0_bk/boost/xpressive/basic_regex.hpp:252

Can you help to check this problem?

Best regards
Forston

callstack

Following is  source code.
#include <boost/xpressive/basic_regex.hpp>
#include <boost/xpressive/regex_primitives.hpp>
#include <boost/xpressive/match_results.hpp>
#include <boost/xpressive/regex_algorithms.hpp>

int main(int argc, char* argv[])
{
    std::wstring uri_string = L"https://192.168.1.1/test";
    printf("begin regex_match  %ls \n ", uri_string.c_str());

    using namespace boost::xpressive;
    static wsregex const uri_regex = bos
            >> (s1 = (alpha >> *(alnum | L'+' | L'-' | L'.')))
            >> L"://" >> (s2 = *(alnum | L'-' | L'.' | L':' | L'@' | L'[' | L']' | L'_'))
            >> !(as_xpr(L'/')
            >> (s3 = (*_)))
            >> eos
            ;

    wsmatch result;
    try
    {
        if (!regex_match(uri_string, result, uri_regex))
        {
                printf( "regex_match failed %ls \n ",  uri_string.c_str());
                return -1;
        }

    }
    catch (std::exception& e)
    {
        printf("regex_match failed %ls \n ", uri_string.c_str());
        return -1;
    }

    printf("end regex_match success %ls \n ", uri_string.c_str());
    return 0;
}

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