boost 1.58 xpressive::sregex outputs errors in debug mode

Question

I encountered some problems when using boost::xpressive of boost1.58 on Visual C++ 2013.

My test program that using below code spills errors like below.

This error does not occur on Release mode.

Is this a boost's bug?

sregex reg = sregex::compile("\\");

Error:

e:\dev\vs2013projects\sandbox\sandbox\sandbox.cpp(35) : see reference to function template instantiation 'boost::xpressive::basic_regex>>> boost::xpressive::basic_regex>>>::compile(const char *,boost::xpressive::basic_regex>>>::flag_type)' being compiled 1>
e:\dev\vs2013projects\sandbox\sandbox\sandbox.cpp(35) : see reference to class template instantiation 'boost::xpressive::basic_regex>>>' being compiled