Strange bug in Julia or Screen - linux

Question

On Debian 8 Linux, I use vim together with screen to send lines from vim to a julia session. Today, I tried https://github.com/Keno/Cxx.jl. I followed the instructions there (i.e. I compiled the latest version 0.5.0-dev+3609 of Julia). The following bug appeared when I tried example 1, I could pinpoint it to the following simple steps:
Create the following files (don't overwrite your own files):
printf "using Cxx\ncxx\"\"\"#include<iostream> \"\"\"\ncxx\"\"\"void testfunction(){std::cout<<\"worked\"<< std::endl;}\"\"\"\njulia_function() = #cxx testfunction()\n" > start
and printf "julia_function()\n" > freeze
Open terminal 1 (I use gnome-terminal) and write screen -S session and then start Julia with julia. It should look like
_
_ _ _(_)_ | A fresh approach to technical computing
(_) | (_) (_) | Documentation: http://docs.julialang.org
_ _ _| |_ __ _ | Type "?help" for help.
| | | | | | |/ _` | |
| | |_| | | | (_| | | Version 0.5.0-dev+3609 (2016-04-18 07:07 UTC)
_/ |\__'_|_|_|\__'_| | Commit a136a6e (0 days old master)
|__/ | x86_64-linux-gnu
julia>
Open terminal 2 and do
screen -S session -p 0 -X eval "readreg p start" "paste p" Terminal 1 should now look like
_
_ _ _(_)_ | A fresh approach to technical computing
(_) | (_) (_) | Documentation: http://docs.julialang.org
_ _ _| |_ __ _ | Type "?help" for help.
| | | | | | |/ _` | |
| | |_| | | | (_| | | Version 0.5.0-dev+3609 (2016-04-18 07:07 UTC)
_/ |\__'_|_|_|\__'_| | Commit a136a6e (0 days old master)
|__/ | x86_64-linux-gnu
julia> using Cxx
julia> cxx"""#include&ltiostream&gt """
true
julia> cxx"""void testfunction(){std::cout<&lt"worked"&lt&lt std::endl;}"""
true
julia> julia_function() = #cxx testfunction()
julia_function (generic function with 1 method)
julia>
Now the strange bug appears: writing "ju", using TAB to complete to "julia_function" and adding "()" by hand in terminal 1 leads to
julia> julia_function()
worked
julia>
But if I do steps 1, 2, 3 and then screen -S session -p 0 -X eval "readreg p freeze" "paste p" in terminal 2 or write julia_function() in terminal 1 without using TAB to complete then I get a freeze in terminal 1:
julia> julia_function()
If I do steps 1, 2, 3, use TAB completion as described above, then (i.e. after the first call, which compiles the function) screen -S session -p 0 -X eval "readreg p freeze" "paste p" in terminal 2 and julia_function() without using TAB in terminal 1 work as expected (it prints "worked") and don't cause a freeze.
If I do not use screen at all, it works (with and without TAB). Can you please tell me what is going on here?