id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
4089	Memory leak in Boost.Signals2 when the signal is not invoked	dan.berindei@…	Frank Mori Hess	"The attached program leaks memory by attaching and detaching slots from a signal in a loop:
{{{
boost::signals2::signal<void(void)> sig;
boost::signals2::connection conn1, conn2, conn3, conn4;

while (true) {
    conn1.disconnect();
    conn2.disconnect();

    conn1 = sig.connect(slot);
    conn2 = sig.connect(slot);

    conn3.disconnect();
    conn4.disconnect();

    conn3 = sig.connect(slot);
    conn4 = sig.connect(slot);

    //sig();
}
}}}
Invoking the signal (i.e. uncommenting the 'sig()' line) plugs the memory leak, however in my original setting it entails lots of unnecessary work so it's not a very good solution.

My guess is that _garbage_collector_it is set to _shared_state->connection_bodies().end() on invocation, but not on a new connection, so it never goes back to the beginning of the list."	Bugs	closed	To Be Determined	signals2	Boost 1.55.0	Problem	invalid