TestGetRandomStateThreadSafe sometimes fails

clpy/tests/clpy_tests/random_tests/test_generator.py

Line 522 in 26ef9b0

class TestGetRandomStateThreadSafe(unittest.TestCase):

Failed at: #276 (review)

Refer to cupy#78

The case failed 5 times in 100 repeats.

Hypothesis: sequential clrandGenerator::_issue_by_np can be interleaved among threads