id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
2782	boost::program_options::notify crashes when variables_map contains user inserted values	boost@…	Vladimir Prus	"variables_map is useful as a generic properties map (esp. due to its various parsers). But when variables_map contains user inserted values (a properties map would support adding/setting values. variables_map does allow base std::map::insert being called), notify would crash/segfault/die due to m_value_semantic being null (empty shared_ptr).

I suggest that a simple check be added to the notify function before calling (*it).second.m_value_semantic->notify()

This would make it a lot more convenient for those who build a properties wrapper around program_options. Thanks. 

"	Bugs	closed	Boost 1.39.0	program_options	Boost 1.38.0	Problem	fixed