[1.5] non blocking copy from #35144

[xwang233]

Bug fix for non-blocking copy from #35144.

[dr-ci]

💊 CircleCI build failures summary and remediations

As of commit d9e8137 (more details on the Dr. CI page):

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• 3/3 failures introduced in this PR

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🕵️ 2 new failures recognized by patterns

The following build failures do not appear to be due to upstream breakages (reran 2 jobs to discount flakiness):

pytorch_linux_xenial_py3_6_gcc5_4_test (1/2)

Step: "Test" (full log | pattern match details) <confirmed not flaky by 2 failures>

Mar 25 02:52:40 AssertionError: 11 not less than or equal to 1e-05 :

Mar 25 02:52:40 ---------------------------------------------------------------------- 
Mar 25 02:52:40 Traceback (most recent call last): 
Mar 25 02:52:40   File "/opt/conda/lib/python3.6/site-packages/torch/testing/_internal/common_distributed.py", line 175, in wrapper 
Mar 25 02:52:40     self._join_processes(fn) 
Mar 25 02:52:40   File "/opt/conda/lib/python3.6/site-packages/torch/testing/_internal/common_distributed.py", line 285, in _join_processes 
Mar 25 02:52:40     self._check_return_codes(elapsed_time) 
Mar 25 02:52:40   File "/opt/conda/lib/python3.6/site-packages/torch/testing/_internal/common_distributed.py", line 328, in _check_return_codes 
Mar 25 02:52:40     self.assertEqual(first_process.exitcode, 0) 
Mar 25 02:52:40   File "/opt/conda/lib/python3.6/site-packages/torch/testing/_internal/common_utils.py", line 915, in assertEqual 
Mar 25 02:52:40     super(TestCase, self).assertLessEqual(abs(x - y), prec, message) 
Mar 25 02:52:40 AssertionError: 11 not less than or equal to 1e-05 :  
Mar 25 02:52:40  
Mar 25 02:52:40 ---------------------------------------------------------------------- 
Mar 25 02:52:40 Ran 27 tests in 31.400s 
Mar 25 02:52:40  
Mar 25 02:52:40 FAILED (failures=1) 
Mar 25 02:52:40  
Mar 25 02:52:40 Generating XML reports... 
Mar 25 02:52:40 Traceback (most recent call last): 
Mar 25 02:52:40   File "test/run_test.py", line 674, in <module> 
Mar 25 02:52:40     main() 

pytorch_linux_xenial_cuda10_2_cudnn7_py3_gcc7_test (2/2)

Step: "Test" (full log | pattern match details) <confirmed not flaky by 2 failures>

Mar 25 03:36:19 AssertionError: 11 not less than or equal to 1e-05 :

Mar 25 03:36:19 ---------------------------------------------------------------------- 
Mar 25 03:36:19 Traceback (most recent call last): 
Mar 25 03:36:19   File "/opt/conda/lib/python3.6/site-packages/torch/testing/_internal/common_distributed.py", line 175, in wrapper 
Mar 25 03:36:19     self._join_processes(fn) 
Mar 25 03:36:19   File "/opt/conda/lib/python3.6/site-packages/torch/testing/_internal/common_distributed.py", line 285, in _join_processes 
Mar 25 03:36:19     self._check_return_codes(elapsed_time) 
Mar 25 03:36:19   File "/opt/conda/lib/python3.6/site-packages/torch/testing/_internal/common_distributed.py", line 328, in _check_return_codes 
Mar 25 03:36:19     self.assertEqual(first_process.exitcode, 0) 
Mar 25 03:36:19   File "/opt/conda/lib/python3.6/site-packages/torch/testing/_internal/common_utils.py", line 915, in assertEqual 
Mar 25 03:36:19     super(TestCase, self).assertLessEqual(abs(x - y), prec, message) 
Mar 25 03:36:19 AssertionError: 11 not less than or equal to 1e-05 :  
Mar 25 03:36:19  
Mar 25 03:36:19 ---------------------------------------------------------------------- 
Mar 25 03:36:19 Ran 27 tests in 21.893s 
Mar 25 03:36:19  
Mar 25 03:36:19 FAILED (failures=1) 
Mar 25 03:36:19  
Mar 25 03:36:19 Generating XML reports... 
Mar 25 03:36:19 Traceback (most recent call last): 
Mar 25 03:36:19   File "test/run_test.py", line 674, in <module> 
Mar 25 03:36:19     main() 

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1 job timed out:

• pytorch_macos_10_13_py3_test

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