id summary reporter owner description type status milestone component version severity resolution keywords cc 8267 lexical_cast uses stream buffers incorrectly John Maddock Antony Polukhin "As noted in http://llvm.org/bugs/show_bug.cgi?id=15446 lexical_cast manipulates stringstream's internal buffer in a non-std conforming way causing it to fail on libc++. If it helps any Boost.Regex has a stream buffer class that (probably) does what you want - see parser_buf in boost/regex/v4/cpp_regex_traits.hpp." Bugs closed Boost 1.54.0 lexical_cast Boost Development Trunk Showstopper fixed