id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
3505	mapped_file windows handle validity check patch against 1.40.0	yrs90@…	Jonathan Turkanis	Windows CreateFile returns INVALID_HANDLE_VALUE on failure while CreateFileMapping returns NULL.  is_open() and cleanup_and_throw(...) assumed reversed.	Bugs	closed	Boost 1.41.0	iostreams	Boost 1.40.0	Problem	fixed