id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
4590	Flushing a filtering_ostream stopped working in Boost 1.44	t0rt1e@…	Jonathan Turkanis	"Since the update to Boost 1.44, flushing an filtering_ostream containing an output_filter and a sink different from std::cout (tested boost::iostreams::back_inserter(std::string) and boost::test_tools::output_test_stream) using the flush() member function stopped working. The output string stays empty. This used to work until Boost 1.43.

I tried to replace the call of flush() with the sync() member function documented in <http://www.boost.org/doc/libs/1_44_0/libs/iostreams/doc/classes/filtering_stream.html>, which leads to compiler error that filtering_ostream does not have this member function. Only using the member function strict_sync() flushes correctly the filtering_ostream in Boost 1.44.

Attached is a test case based on the back_inserter example in <http://www.boost.org/doc/libs/1_44_0/libs/iostreams/doc/tutorial/container_sink.html> augmented by a transparent filter simplified from the code example in <http://www.boost.org/doc/libs/1_44_0/libs/iostreams/doc/concepts/output_filter.html>."	Bugs	closed	To Be Determined	iostreams	Boost 1.44.0	Problem	fixed		duncanphilipnorman@…