Sending TCP message to unknown local agent leads to bounds error

[jsagerOffis]

example code:

using Mango
using Sockets: InetAddr, @ip_str
import Mango.AgentCore.handle_message

@agent struct ReplyAgent

end

function handle_message(agent::ReplyAgent, message::Any, meta::Any)
    println("$(agent.aid) got a message \nwith content $message \nand meta $meta")
end

function main()
    c1_addr = InetAddr(ip"127.0.0.1", 5555)
    c1 = Container()
    c1.protocol = TCPProtocol(address=c1_addr)

    a1 = ReplyAgent()

    register(c1, a1, "Timmy")

    # start container loop
    wait(Threads.@spawn start(c1))

    timmy_addr = AgentAddress("Timmy", c1_addr, nothing)
    unknown_addr = AgentAddress("unknown", c1_addr, nothing)

    # send some messages
    wait(send_message(c1, "hello", unknown_addr))

    # stop container loop
    wait(Threads.@spawn shutdown(c1))
end

main()

Output:

┌ Warning: Container Dict{String, Agent}("Timmy" => ReplyAgent(ReentrantLock(nothing, 0x00000000, 0x00, Base.GenericCondition{Base.Threads.SpinLock}(Base.IntrusiveLinkedList{Task}(nothing, nothing), Base.Threads.SpinLock(0)), (0, 0, 0)), AgentContext(Container
│   agents: Dict{String, Agent}
│   agent_counter: Int64 1
│   protocol: TCPProtocol
│   codec: Tuple{typeof(Mango.EncodeDecode.encode), typeof(Mango.EncodeDecode.decode)}
│   shutdown: Bool false
│   loop: Task
│   tasks: Array{Any}((0,))
│ ), AgentRoleHandler(Role[], Tuple{Role, Function, Function}[], Tuple{Role, Function}[], Dict{DataType, Vector{Tuple{Role, Function, Function}}}(), Dict{DataType, Any}()), Scheduler
│   tasks: ConcurrentCollections.Implementations.LinearProbingDict{Task, TaskData, Union{ConcurrentCollections.Implementations.Empty, Task}, Union{ConcurrentCollections.Implementations.Empty, ConcurrentCollections.Implementations.Moved{ConcurrentCollections.Implementations.Empty}, ConcurrentCollections.Implementations.Moved{TaskData}, TaskData}}
│ , "Timmy", Dict{String, Tuple}())) has no agent with id: unknown
└ @ Mango.ContainerCore ~/.julia/packages/Mango/zCuwp/src/container/core.jl:159
ERROR: LoadError: BoundsError: attempt to access 0-element Vector{Any} at index [1]
Stacktrace:
 [1] getindex
   @ ./essentials.jl:13 [inlined]
 [2] forward_message(container::Container, msg::String, meta::OrderedCollections.OrderedDict{String, Any}; receivers::Nothing)
   @ Mango.ContainerCore ~/.julia/packages/Mango/zCuwp/src/container/core.jl:169
 [3] forward_message
   @ ~/.julia/packages/Mango/zCuwp/src/container/core.jl:146 [inlined]
 [4] send_message(container::Container, content::String, agent_adress::AgentAddress, sender_id::Nothing; kwargs::@Kwargs{})
   @ Mango.ContainerCore ~/.julia/packages/Mango/zCuwp/src/container/core.jl:212
 [5] send_message (repeats 2 times)
   @ ~/.julia/packages/Mango/zCuwp/src/container/core.jl:186 [inlined]
 [6] main()
   @ Main ~/work/code/tutorial_demo_env/my_first_agent.jl:29
 [7] top-level scope
   @ ~/work/code/tutorial_demo_env/my_first_agent.jl:35
in expression starting at /home/jens/work/code/tutorial_demo_env/my_first_agent.jl:35