#include <boost/exception/all.hpp>
#include <boost/throw_exception.hpp>

int main() {
	try {
		BOOST_THROW_EXCEPTION(std::runtime_error(""));
	}
	catch (...) {
		// Prints nothing
		std::cout << "Exception: " << boost::current_exception_diagnostic_information() << std::endl;
	}

	try {
		// Just add a space
		BOOST_THROW_EXCEPTION(std::runtime_error(" "));
	}
	catch (...) {
		// Now we error info is printed
		std::cout << "Exception: " << boost::current_exception_diagnostic_information() << std::endl;
	}
}