Proper usage of std::move - c++

Question

The following code works:
class Handler {
public:
Application* application;
bool handle(sf::Event&);
};
class TestApp {
public:
TestApp();
bool running;
void run();
void attach_handler(Handler*);
std::forward_list<std::unique_ptr<Handler>> handlerFList;
};
TestApp::TestApp() {
}
void Application::run() {
while (running) {
sf::Event event;
while (window->pollEvent(event)) {
for (auto& handler : handlerFList) {
if (handler->handle(event)) {
break;
}
}
}
}
}
void Application::attach_handler(Handler* handler) {
handlerFList.push_front(std::unique_ptr<Handler>(std::move(handler)));
handler->application = this;
}
int main() {
sqt::TestApp app;
sqe::HandlerClose hc;
app.attach_handler(&hc);
app.run();
return 0;
}
But this one does not:
class Handler {
public:
Application* application;
bool handle(sf::Event&);
};
class TestApp {
public:
TestApp();
bool running;
void run();
void attach_handler(Handler*);
std::forward_list<std::unique_ptr<Handler>> handlerFList;
};
TestApp::TestApp() {
sqe::HandlerClose hc;
attach_handler(&hc);
}
void TestApp::run() {
while (running) {
sf::Event event;
while (window->pollEvent(event)) {
for (auto& handler : handlerFList) {
if (handler->handle(event)) { // SEGFAULTS
break;
}
}
}
}
}
void TestApp::attach_handler(Handler* handler) {
handlerFList.push_front(std::unique_ptr<Handler>(std::move(handler)));
handler->application = this;
}
int main() {
sqt::TestApp app;
app.run();
return 0;
}
It segfaults where marked. I can't work out what I'm doing wrong. Isn't std::move supposed to move the base object? What it seems like is happening is that once TestApp's constructor finishes, the object is getting deleted. How can I fix this?