Unreachable reached

[Gnimuc]

               _
   _       _ _(_)_     |  Documentation: https://docs.julialang.org
  (_)     | (_) (_)    |
   _ _   _| |_  __ _   |  Type "?" for help, "]?" for Pkg help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 1.3.1-pre.20 (2019-12-19)
 _/ |\__'_|_|_|\__'_|  |  release-1.3/90620af6b9 (fork: 116 commits, 133 days)
|__/                   |

julia> using Cxx

julia> cxx""" #include<iostream> """
true

julia> cxx"""
          void testJuliaPrint() {
              $:(println("\nTo end this test, press any key")::Nothing);
          }
          """
true

julia> @cxx testJuliaPrint()
Unreachable reached at 0x139c38ac0

signal (4): Illegal instruction: 4
in expression starting at REPL[5]:1
unknown function (ip: 0x139c38abf)
unknown function (ip: 0x139c38ab0)
unknown function (ip: 0x139c38a8c)
macro expansion at /Users/gnimuc/.julia/dev/Cxx/src/codegen.jl:841 [inlined]
cppcall at /Users/gnimuc/.julia/dev/Cxx/src/codegen.jl:841
unknown function (ip: 0x139c38a6c)
jl_apply at /Users/sabae/buildbot/worker/package_macos64/build/src/./julia.h:1631 [inlined]
do_call at /Users/sabae/buildbot/worker/package_macos64/build/src/interpreter.c:328
eval_body at /Users/sabae/buildbot/worker/package_macos64/build/src/interpreter.c:0
jl_interpret_toplevel_thunk_callback at /Users/sabae/buildbot/worker/package_macos64/build/src/interpreter.c:888
unknown function (ip: 0xfffffffffffffffe)
unknown function (ip: 0x12e490d8f)
unknown function (ip: 0x2)
jl_interpret_toplevel_thunk at /Users/sabae/buildbot/worker/package_macos64/build/src/interpreter.c:897
jl_toplevel_eval_flex at /Users/sabae/buildbot/worker/package_macos64/build/src/toplevel.c:814
jl_toplevel_eval_flex at /Users/sabae/buildbot/worker/package_macos64/build/src/toplevel.c:764
jl_toplevel_eval at /Users/sabae/buildbot/worker/package_macos64/build/src/toplevel.c:823 [inlined]
jl_toplevel_eval_in at /Users/sabae/buildbot/worker/package_macos64/build/src/toplevel.c:843
eval at ./boot.jl:330
eval_user_input at /Users/sabae/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.3/REPL/src/REPL.jl:86
run_backend at /Users/gnimuc/.julia/packages/Revise/S7mrl/src/Revise.jl:1057
#85 at ./task.jl:333
jl_apply at /Users/sabae/buildbot/worker/package_macos64/build/src/./julia.h:1631 [inlined]
start_task at /Users/sabae/buildbot/worker/package_macos64/build/src/task.c:659
Allocations: 37777682 (Pool: 37766381; Big: 11301); GC: 39
[1]    10869 illegal hardware instruction  julia

Both Julia 1.3.0 and the latest release-1.3 branch give the same errors.