scipy: linalg tests failing in runtests.py

My issue is about working on a code change in scipy.special tests passed in special when performing full test suite before opening a PR the test runner consistently showed a linalg test error. My special changes had no impact on linalg (unless if was using bdtr() which I don’t think is the case here.

I think the issue was related to https://github.com/scipy/scipy/pull/11304 but not certain (the failing test was in linalg in test_decomp tests. Running git bisect indicated: 3b42df528 MAINT: Rewrap ??evr, add lwork, adjust eigh is the offending commit. It looks like this may be related to this issue: https://github.com/scipy/scipy/issues/11576

Reproducing code example:

After checking out on a branch 3b42df528 MAINT: Rewrap ??evr, add lwork, adjust eigh

Bisecting: 0 revisions left to test after this (roughly 0 steps)
[3b42df52810813d6a7be352d77c6b28af6aa14ac] MAINT: Rewrap ??evr, add lwork, adjust eigh
(scipy-dev) Lucass-MacBook:scipy rlucas$ python runtests.py -v -s linalg
Building, see build.log...
Build OK (0:00:47.733089 elapsed)
================================================================================ test session starts ================================================================================
platform darwin -- Python 3.6.7, pytest-5.0.1, py-1.7.0, pluggy-0.13.1 -- /Users/rlucas/anaconda3/envs/scipy-dev/bin/python
cachedir: .pytest_cache
rootdir: /Users/rlucas/scipy-dev/scipy, inifile: pytest.ini
collected 1413 items / 5 deselected / 1408 selected                                                                                                                                 

scipy/linalg/tests/test_basic.py::TestSolveBanded::test_real PASSED                                                                                                           [  0%]
scipy/linalg/tests/test_basic.py::TestSolveBanded::test_complex PASSED                                                                                                        [  0%]
scipy/linalg/tests/test_basic.py::TestSolveBanded::test_tridiag_real PASSED         
 ... output truncated ...

Error message:

 ... output truncated ...
scipy/linalg/tests/test_decomp_update.py::TestQRdelete_F::test_neg_strides_1_row PASSED                                                                                       [ 37%]
scipy/linalg/tests/test_decomp_update.py::TestQRdelete_F::test_neg_strides_p_row PASSED                                                                                       [ 37%]
scipy/linalg/tests/test_decomp_update.py::TestQRdelete_F::test_neg_strides_1_col Fatal Python error: Segmentation fault

Current thread 0x00007fff8e2c5380 (most recent call first):
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/numpy/core/fromnumeric.py", line 74 in _wrapreduction
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/numpy/core/fromnumeric.py", line 2398 in all
  File "<__array_function__ internals>", line 6 in all
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/numpy/core/numeric.py", line 2259 in isclose
  File "<__array_function__ internals>", line 6 in isclose
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/numpy/testing/_private/utils.py", line 1528 in compare
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/numpy/testing/_private/utils.py", line 794 in assert_array_compare
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/numpy/testing/_private/utils.py", line 1533 in assert_allclose
  File "/Users/rlucas/scipy-dev/scipy/build/testenv/lib/python3.6/site-packages/scipy/linalg/tests/test_decomp_update.py", line 21 in assert_unitary
  File "/Users/rlucas/scipy-dev/scipy/build/testenv/lib/python3.6/site-packages/scipy/linalg/tests/test_decomp_update.py", line 32 in check_qr
  File "/Users/rlucas/scipy-dev/scipy/build/testenv/lib/python3.6/site-packages/scipy/linalg/tests/test_decomp_update.py", line 387 in base_non_simple_strides
  File "/Users/rlucas/scipy-dev/scipy/build/testenv/lib/python3.6/site-packages/scipy/linalg/tests/test_decomp_update.py", line 435 in test_neg_strides_1_col
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/_pytest/python.py", line 165 in pytest_pyfunc_call
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/pluggy/callers.py", line 187 in _multicall
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/pluggy/manager.py", line 87 in <lambda>
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/pluggy/manager.py", line 93 in _hookexec
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/pluggy/hooks.py", line 286 in __call__
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/_pytest/python.py", line 1451 in runtest
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/_pytest/runner.py", line 117 in pytest_runtest_call
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/pluggy/callers.py", line 187 in _multicall
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/pluggy/manager.py", line 87 in <lambda>
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/pluggy/manager.py", line 93 in _hookexec
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/pluggy/hooks.py", line 286 in __call__
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/_pytest/runner.py", line 192 in <lambda>
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/_pytest/runner.py", line 220 in from_call
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/_pytest/runner.py", line 192 in call_runtest_hook
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/_pytest/runner.py", line 167 in call_and_report
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/_pytest/runner.py", line 87 in runtestprotocol
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/_pytest/runner.py", line 72 in pytest_runtest_protocol
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/pluggy/callers.py", line 187 in _multicall
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/pluggy/manager.py", line 87 in <lambda>
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/pluggy/manager.py", line 93 in _hookexec
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/pluggy/hooks.py", line 286 in __call__
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/_pytest/main.py", line 278 in pytest_runtestloop
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/pluggy/callers.py", line 187 in _multicall
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/pluggy/manager.py", line 87 in <lambda>
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/pluggy/manager.py", line 93 in _hookexec
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/pluggy/hooks.py", line 286 in __call__
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/_pytest/main.py", line 257 in _main
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/_pytest/main.py", line 213 in wrap_session
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/_pytest/main.py", line 250 in pytest_cmdline_main
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/pluggy/callers.py", line 187 in _multicall
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/pluggy/manager.py", line 87 in <lambda>
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/pluggy/manager.py", line 93 in _hookexec
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/pluggy/hooks.py", line 286 in __call__
  File "/Users/rlucas/anaconda3/envs/scipy-dev/lib/python3.6/site-packages/_pytest/config/__init__.py", line 74 in main
  File "/Users/rlucas/scipy-dev/scipy/build/testenv/lib/python3.6/site-packages/scipy/_lib/_testutils.py", line 69 in __call__
  File "runtests.py", line 307 in main
  File "runtests.py", line 496 in <module>
Segmentation fault: 11
(scipy-dev) Lucass-MacBook:scipy rlucas$

Scipy/Numpy/Python version information: