`bin/test_jit --gtest_filter=JitTest.CustomOperators --gtest_repeat=2` fails

[malfet]

🐛 Bug

Multiple runs of JitTest.CustomOperators fail with:

C++ exception with description "(ops.size()) == (1) INTERNAL ASSERT FAILED at /home/nshulga/git/pytorch/test/cpp/jit/test_custom_operators.cpp:17, please report a bug to PyTorch.  (testCustomOperators at /home/nshulga/git/pytorch/test/cpp/jit/test_custom_operators.cpp:17)

To Reproduce

cmake /path/to/pytorch -G Ninja; ninja test_jit; bin/test_jit --gtest_filter=JitTest.CustomOperators --gtest_repeat=2

cc @suo

[malfet]

Looking into this one now.

[malfet]

And it happens because deregister is not implemented: https://github.com/pytorch/pytorch/blob/master/torch/csrc/jit/runtime/register_c10_ops.cpp#L160

[suo]

lol, cc @smessmer