"pthread_cond_signal: Undefined error: 0" happen in using GPU on Mac OS High Sierra

Hi, Everyone.

I try to set up chainer 3.2.0 on Mac OS High Sierra 10.13.2.

When I executed chainer example in using GPU, it output “pthread_cond_signal: Undefined error: 0” in my terminal.
However, when I executed chainer example in using CPU, it happen no error.

I tried CUDA sample, and it was fine.

So, I understood the GPU calculation was fine.

Could you please kindly advise to me?