id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
13349,sregex not thread-safe when copied,wave@…,Eric Niebler,"The following code does fail about every other execution:

{{{
#!c++

#include <iostream>
#include <boost/xpressive/xpressive.hpp>
#include <boost/thread.hpp>
using namespace std;
using namespace boost::xpressive;

struct MyRegexContainer {
    boost::xpressive::sregex myPatterns[20];

    MyRegexContainer() {

    	myPatterns[0] = sregex::compile(""[-]?[0-9]+\\.[0-9]{2}"");
        for (int i =0; i < 20; i++)
        {
        	myPatterns[i] = myPatterns[0];
        }
	}

	void match(const std::string& wert, int index) const {
			if(!regex_match(wert, myPatterns[index])){
				cout << ""Index "" << index << "" did not match value "" << wert << endl;
			}
	}
};


namespace {
    void testSREGEXMultithreadedTASK() {
	static const MyRegexContainer a;
        for (int i = 0; i < 10000; ++i) {
			a.match(""33.00"", i%20);
			a.match(""1.11"", i%20);
        }
    }
}

int main() {
#ifdef BOOST_DISABLE_THREADS
	cout << ""BOOST_DISABLE_THREADS == TRUE"" << wert << endl;
#endif

boost::thread_group tgroup;
    for (int i = 0; i < 100; ++i) {
        tgroup.create_thread(boost::bind(&testSREGEXMultithreadedTASK));
    }
    tgroup.join_all();

return 0;
}

}}}",Bugs,new,To Be Determined,xpressive,Boost 1.64.0,Problem,,,