task in the while loop

main.jl

function main()
    c = 0
    while true
        c += 1
        @info "c" c
        t = @async begin
            try
                sleep(1)
                if c >= 5
                    @show x
                end
                return :done
            catch e
                if e isa InterruptException
                    @info "Exit"
                    return :interrupted
                else
                    rethrow(e)
                end
            end
        end
        wait(t)
        status = fetch(t)
        if status === :done
            @info "Done"
            continue
        end
        if status === :interrupted
            @info "stopped"
            break
        end
        if istaskfailed(t)
            throw(TaskFailedException())
        end
    end
end

main()