id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
7704	lexical_cast to filesystem::path fails for string::length > 22	Braden McDaniel <braden@…>	Antony Polukhin	"When building with clang on Darwin using `-stdlib=libc++`, a `lexical_cast` to a `filesystem::path` will fail if the input string is longer than 22 elements.

Consider this test program:

{{{
#!C++
#include <boost/lexical_cast.hpp>
#include <boost/filesystem/path.hpp>

int main()
{
  try {
    boost::filesystem::path p;
    std::string s1 = ""aaaaaaaaaaaaaaaaaaaaaaa"";
    p = boost::lexical_cast<boost::filesystem::path>(s1);
  } catch (std::exception & ex) {
    std::cerr << ex.what() << std::endl;
    return EXIT_FAILURE;
  }
}
}}}
…compiled thusly:
{{{
clang++ -stdlib=libc++ -I /Users/bradenmcdaniel/Source/boost_1_52_0 -L /Users/bradenmcdaniel/Source/boost_1_52_0/stage/lib -lboost_filesystem -lboost_system -o lexical-cast-path lexical_cast_path.cpp
}}}

When run, it produces this output:
{{{
$ ./lexical-cast-path 
bad lexical cast: source type value could not be interpreted as target
}}}

If the length of `s1` is reduced by 1 (from 23 to 22), the test program will succeed.
"	Bugs	closed	Boost 1.54.0	lexical_cast	Boost 1.52.0	Problem	fixed