segmentation fault issue

[yuwen-yan]

(tensorflow09GPU)➜  MemN2N-tensorflow git:(master) python main.py --nhop 6 --mem_size 100
I tensorflow/stream_executor/dso_loader.cc:108] successfully opened CUDA library libcublas.so locally
I tensorflow/stream_executor/dso_loader.cc:108] successfully opened CUDA library libcudnn.so locally
I tensorflow/stream_executor/dso_loader.cc:108] successfully opened CUDA library libcufft.so locally
I tensorflow/stream_executor/dso_loader.cc:108] successfully opened CUDA library libcuda.so locally
I tensorflow/stream_executor/dso_loader.cc:108] successfully opened CUDA library libcurand.so locally
Read 929589 words from data/ptb.train.txt
Read 73760 words from data/ptb.valid.txt
Read 82430 words from data/ptb.test.txt
{'batch_size': 128,
 'checkpoint_dir': 'checkpoints',
 'data_dir': 'data',
 'data_name': 'ptb',
 'edim': 150,
 'init_hid': 0.1,
 'init_lr': 0.01,
 'init_std': 0.05,
 'is_test': False,
 'lindim': 75,
 'max_grad_norm': 50,
 'mem_size': 100,
 'nepoch': 100,
 'nhop': 6,
 'nwords': 10000,
 'show': False}
[1]    9730 segmentation fault (core dumped)  python main.py --nhop 6 --mem_size 100