At least two recent builds faced this issue ``` test_vm.test_sum_loop ... ./tests/scripts/task_python_integration.sh: line 41: 31836 Segmentation fault (core dumped) TVM_FFI=ctypes python3 -m nose -v tests/python/relay ``` http://ci.tvm.ai:8080/blue/organizations/jenkins/tvm/detail/PR-3342/1/pipeline/ http://ci.tvm.ai:8080/blue/organizations/jenkins/tvm/detail/PR-3350/1/pipeline