id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
11918	access violation when using string literals with lambda style formatting expressions	Stefan Mianome <smianome@…>	Andrey Semashev	"The code below crashes with an access violation when using the BOOST_LOG_SEV macro. I'm using boost 1.60 compiled with msvc-10.0.
{{{#!c++
    #include <boost/log/trivial.hpp>
    #include <boost/log/sinks.hpp>
    #include <boost/log/expressions.hpp>
    #include <boost/log/expressions/formatters.hpp>
    #include <boost/log/attributes.hpp>
    #include <boost/core/null_deleter.hpp>
    #include <iostream>
    
    #define BOOST_TEST_MODULE TestsLogging
    #include <boost/test/unit_test.hpp>
	BOOST_AUTO_TEST_SUITE(example_lib_log)

	BOOST_AUTO_TEST_CASE(severity_logging_min) {
						
		namespace src = ::boost::log::sources;
		namespace keywords = ::boost::log::keywords;
		namespace expr = boost::log::expressions;
		namespace attributes = boost::log::attributes;

		//sink backend setup
		typedef boost::log::sinks::text_ostream_backend text_ostream_backend;

		boost::shared_ptr<text_ostream_backend> backend =
			boost::make_shared<text_ostream_backend>();

		backend->add_stream(boost::shared_ptr<std::ostream>(&std::cerr, boost::null_deleter()));
		backend->auto_flush(true);

		//sink frontend setup
		typedef boost::log::sinks::synchronous_sink<text_ostream_backend> synchronous_sink_text_ostream_backend;
			
		boost::shared_ptr<synchronous_sink_text_ostream_backend> sink(new synchronous_sink_text_ostream_backend(backend));

		sink->set_formatter(expr::stream << ""["" << expr::message); //problem is here

		boost::log::core::get()->add_sink(sink);

		//logger setup
		typedef src::severity_logger<boost::log::trivial::severity_level> severity_logger;

		severity_logger lg;

		//logging function
		BOOST_LOG_SEV(lg, boost::log::trivial::debug) << ""First entry.""; //exception happens here

		boost::log::core::get()->remove_sink(sink);
	}
    BOOST_AUTO_TEST_SUITE_END()
}}}
 - When I remove the line where the formatter for the sink is set, the code works fine. 
 - When I remove the string literal ""["" from the stream (expr::stream << expr::message), the code works fine.
 - When i move the string literal to the end (expr::stream << expr::message << ""["") the code also works.
 - The code works with boost 1.57."	Bugs	closed	To Be Determined	log	Boost 1.60.0	Regression	duplicate	formatting