Test errors

[mjram0s]

┌ Error: Fatal error on process 1
│   exception =
│    attempt to send to unknown socket
│    Stacktrace:
│     [1] error(::String) at ./error.jl:33
│     [2] send_msg_unknown(::Sockets.TCPSocket, ::Distributed.MsgHeader, ::Distributed.ResultMsg) at /Users/osx/buildbot/slave/package_osx64/build/usr/share/julia/stdlib/v1.0/Distributed/src/messages.jl:111
│     [3] send_msg_now(::Sockets.TCPSocket, ::Distributed.MsgHeader, ::Distributed.ResultMsg) at /Users/osx/buildbot/slave/package_osx64/build/usr/share/julia/stdlib/v1.0/Distributed/src/messages.jl:127
│     [4] deliver_result(::Sockets.TCPSocket, ::Symbol, ::Distributed.RRID, ::RemoteChannel{Channel{Any}}) at /Users/osx/buildbot/slave/package_osx64/build/usr/share/julia/stdlib/v1.0/Distributed/src/process_messages.jl:88
│     [5] macro expansion at /Users/osx/buildbot/slave/package_osx64/build/usr/share/julia/stdlib/v1.0/Distributed/src/process_messages.jl:270 [inlined]
│     [6] (::getfield(Distributed, Symbol("##111#113")){Distributed.CallMsg{:call_fetch},Distributed.MsgHeader,Sockets.TCPSocket})() at ./task.jl:259

This error is produced multiple times when running tests (@iamed2 suspects every time rmprocs is called).

[nicoleepp]

This is still an issue, and CI is failing with it every other time more or less. The errors are produced on Windows only when testins Julia "1" it seems: https://github.com/invenia/Dispatcher.jl/actions?query=workflow%3ACI

[nicoleepp]

Another instance of this: https://github.com/invenia/Dispatcher.jl/runs/1859939336

[nicoleepp]

https://github.com/invenia/Dispatcher.jl/runs/1868138716