Re: [boost] [regex] Need some help with msvc-11/12

This seems to be a bug in VC12's std::collate::do_transform. If _Wcsxfrm returns INT_MAX to indicate that the call to __crtLCMapStringW failed, the string gets resized to INT_MAX elements. I will report this on Microsoft Connect. The hang doesn't occur if you don't call transform for empty strings.