id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
1420	optional_base::operator=() optimization	rick68@…	Fernando Cacciola	"Hi,

{{{
A a1;
boost::optional<A> opt1(a1);
boost::optional<A> opt2;
opt2 = opt1;
}}}

the operator=() will call to assign(optional<U> const& rsh), not assign(optional_base const& rsh). 
"	Patches	closed	Boost 1.35.0	optional	Boost 1.34.1	Optimization	fixed		fernando_cacciola@…