Channel Last Tensor save/read fails occasionally

[djeong20]

nntrainer_Tensor.save_read_01_nhwc_p unit test failure has occurred on the local machine as follows.

[ RUN      ] nntrainer_Tensor.save_read_01_nhwc_p
../test/unittest/unittest_nntrainer_tensor_nhwc.cpp:3742: Failure
Expected equality of these values:
  target
    Which is: <N9nntrainer6TensorE at 0x7ffc36ed5080>
data addr: 0x55dac0b76bf0
Shape: 3:4:5:6 [ FP32 : NHWC ]
[1 1 1 ... 357 357 357]

  readed
    Which is: <N9nntrainer6TensorE at 0x7ffc36ed5190>
data addr: 0x55dac0b771a0
Shape: 3:4:5:6 [ FP32 : NHWC ]
[1 2 3 ... 358 359 360]

../test/unittest/unittest_nntrainer_tensor_nhwc.cpp:3746: Failure
Expected equality of these values:
  status
    Which is: -1
  0
[  FAILED  ] nntrainer_Tensor.save_read_01_nhwc_p (0 ms)

Despite several attempts, I couldn't reproduce it, so I'm leaving it as a known issue.

[taos-ci]

cibot: Thank you for posting issue #2494. The person in charge will reply soon.