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

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

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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.



#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





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"";

    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;



        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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