On Mac OS X, importing ray before numba dies with llvm error: "Expected all immutable passes to be initialized"

System information

• OS Platform and Distribution: Mac OS X 10.14.5
• Ray installed from (source or binary): ray-0.7.2-cp37-cp37m-macosx_10_6_intel.whl
• Ray version: 0.7.2
• Python version: 3.7.2
• Exact command to reproduce:

import ray
import numba

Describe the problem

Versions of ray>=0.7.1 cannot be imported before numba or an issue with llvmlite will be triggered (see also https://github.com/numba/numba/issues/4256 for additional minimal reproduction steps). Importing numba first seems to work around the issue.

The error reporting is an assertion failure:

Assertion failed: (PassInf && "Expected all immutable passes to be initialized"), function addImmutablePass, file /Users/buildbot/miniconda3/conda-bld/llvmdev_1556270736866/work/lib/IR/LegacyPassManager.cpp, line 849.

that leads to the python interpreter aborting. The issue does not seem to occur on Linux.

Version 0.7.0 seems unaffected.

[robertnishihara]

Fixed in ray==0.8.2.

[robertnishihara]

@MQQ so yes, we are planning to do it. Not sure if it will be in the upcoming release or the following one.