Basics Publisher Example Crashes

The [example publisher](https://zguide.zeromq.org/docs/chapter1/#Getting-the-Message-Out) in the Basics section of the ZMQ Guide crashes if put in a function. See this: ``` using ZMQ function main() context = Context() socket = Socket(context, PUB) bind(socket, "tcp://*:5556") while true zipcode = rand(10000:99999) temperature = rand(-80:135) relhumidity = rand(10:60) message = "$zipcode $temperature $relhumidity" send(socket, message) yield() end close(socket) close(context) end if abspath(PROGRAM_FILE) == @__FILE__ main() end ``` Which results in: ``` ERROR: LoadError: StateError("Unknown error") Stacktrace: [1] _send(socket::Socket, zmsg::Base.RefValue{ZMQ._Message}, more::Bool) @ ZMQ C:\Users\toby\.julia\packages\ZMQ\lrABE\src\comm.jl:14 [2] send(socket::Socket, data::String; more::Bool) @ ZMQ C:\Users\toby\.julia\packages\ZMQ\lrABE\src\comm.jl:45 [3] send @ C:\Users\toby\.julia\packages\ZMQ\lrABE\src\comm.jl:42 [inlined] [4] main() @ Main C:\Users\toby\Workspaces\ZMQTest.jl\publisher_basics.jl:13 [5] top-level scope @ C:\Users\toby\Workspaces\ZMQTest.jl\publisher_basics.jl:22 in expression starting at C:\Users\toby\Workspaces\ZMQTest.jl\publisher_basics.jl:21 ``` Everthing is fine if the code is not encapsulated inside a function: ``` using ZMQ context = Context() socket = Socket(context, PUB) bind(socket, "tcp://*:5556") while true zipcode = rand(10000:99999) temperature = rand(-80:135) relhumidity = rand(10:60) message = "$zipcode $temperature $relhumidity" send(socket, message) yield() end close(socket) close(context) ``` I'm on Windows 11 running Julia v1.8.5 with ZMQ v1.2.2. Any idea what I could have done wrong? It seems to me like a rather simple change that couldn't really hurt, but apparently I have been proven wrong and could have misused the API.