id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
9380	regex return empty submatch on some machines/compilers	Jannich Thorsen <jannich@…>	John Maddock	"Upgraded to 1.55.0 and now this regex fails on our 32bit Ubuntu, but still works fine on our 64bit Ubuntu and RedHat variants.

Configuration is: Ubuntu 8.04.4 LTS, 32bit, gcc 4.2.4

{{{

bool parseBusName(const std::string& busName) const {
    boost::regex regularExpressionBus (""^([^\[]+)\[([0-9]+)-([0-9]+)\]"", boost::regex::extended);
    boost::cmatch w;
    if(!regex_match(busName.c_str(), w, regularExpressionBus))
      return false;

    std::cerr << w.size() << "" >"" << w[1] << ""< >"" << w[2] << ""< >"" << w[3] << ""<"" << std::endl;
    return true;
  }


parseBusName(""top[0-1]"")

output is: 4 >< >< ><
expected:  4 >top< >0< >1<

}}}

We where previously running boost 1.48.0 which worked fine on all our configurations.

NOTE: Replacing boost::regex::extended with boost::regex::perl makes the test pass again on 32bit/gcc4.2.4.

Thanks,
Jannich"	Bugs	closed	To Be Determined	regex	Boost 1.55.0	Problem	worksforme