py27_native.test.unit._channel_ready_future_test.ChannelReadyFutureTest is flaky on master #15308
Description
E.g.
https://source.cloud.google.com/results/invocations/505e665b-86c0-43b0-8dc9-3ee7651642b4
https://source.cloud.google.com/results/invocations/d2b80a54-fb8c-48ae-b249-5cd73ea18a6d
++ dirname /var/local/git/grpc/tools/run_tests/helper_scripts/run_python.sh
+ cd /var/local/git/grpc/tools/run_tests/helper_scripts/../../..
++ realpath py27_native/bin/python
+ PYTHON=/var/local/git/grpc/py27_native/bin/python2.7
++ pwd
+ ROOT=/var/local/git/grpc
+ /var/local/git/grpc/py27_native/bin/python2.7 /var/local/git/grpc/src/python/grpcio_tests/setup.py test_lite
running test_lite
Running unit._channel_ready_future_test.ChannelReadyFutureTest.test_immediately_connectable_channel_connectivity
[95mTesting gRPC Python...
[0m[92mSUCCESS unit._channel_ready_future_test.ChannelReadyFutureTest.test_immediately_connectable_channel_connectivity
[0mRunning unit._channel_ready_future_test.ChannelReadyFutureTest.test_lonely_channel_connectivity
[92mSUCCESS unit._channel_ready_future_test.ChannelReadyFutureTest.test_lonely_channel_connectivity
[0m2 tests finished:
2 successful
0 unsuccessful
0 skipped
0 expected failures
0 unexpected successes
Interrupted Tests:
[]
Errors/Failures:
Unexpected successes: []
/var/local/git/grpc/tools/run_tests/helper_scripts/run_python.sh: line 25: 11869 Segmentation fault (core dumped) $PYTHON "$ROOT/src/python/grpcio_tests/setup.py" "$2"