Example http_server_async.cpp size() on moved away object?

[SimonEbner]

I was going through the examples and wondering if the line 197 in the example http_server_async.cpp is correct

beast/example/http/server/async/http_server_async.cpp

Line 197 in 2555942

res.content_length(body.size());

since it is calling size() on the object that has been moved in line 193?

beast/example/http/server/async/http_server_async.cpp

Line 193 in 2555942

std::make_tuple(std::move(body)),

Or if it's working correctly if it's not brittle to say the least?

[vinniefalco]

How the heck does that even work? Yeah it looks off...