py38-numpy: RuntimeError: Polyfit sanity test emitted a warning, most likely due to using a buggy Accelerate backend.

[mf2k (Frank Schima)]

Seeing this on macOS 11.0.1. Xcode 12.2.

:info:destroot     import numpy as np
:info:destroot   File "/opt/local/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/numpy/__init__.py", line 286, in <module>
:info:destroot     raise RuntimeError(msg)
:info:destroot RuntimeError: Polyfit sanity test emitted a warning, most likely due to using a buggy Accelerate backend. If you compiled yourself, see site.cfg.example for information. Otherwise report this to the vendor that provided NumPy.

$ port installed py38-numpy
The following ports are currently installed:
  py38-numpy @1.19.4_0+gfortran+openblas (active)

Error occurs while staging py-matplotlib but may be in py-numpy.

[mf2k (Frank Schima)]

I believe the issue is directly in py-numpy. Although it is intermittent for me.

$ ipython
Python 3.8.6 (default, Oct  6 2020, 17:43:36) 
Type 'copyright', 'credits' or 'license' for more information
IPython 7.19.0 -- An enhanced Interactive Python. Type '?' for help.

In [1]: import numpy

In [2]: exit

$ ipython
Python 3.8.6 (default, Oct  6 2020, 17:43:36) 
Type 'copyright', 'credits' or 'license' for more information
IPython 7.19.0 -- An enhanced Interactive Python. Type '?' for help.

In [1]: import numpy
Python(1551,0x10f953e00) malloc: can't allocate region
:*** mach_vm_map(size=18446744066756825088, flags: 100) failed (error code=3)
Python(1551,0x10f953e00) malloc: *** set a breakpoint in malloc_error_break to debug
init_dgelsd failed init
---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
<ipython-input-1-d4cdadb62aa7> in <module>
----> 1 import numpy

/opt/local/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/numpy/__init__.py in <module>
    284                     "that provided NumPy.\n{}\n".format(
    285                         error_message))
--> 286                 raise RuntimeError(msg)
    287     del _mac_os_check
    288 

RuntimeError: Polyfit sanity test emitted a warning, most likely due to using a buggy Accelerate backend. If you compiled yourself, see site.cfg.example for information. Otherwise report this to the vendor that provided NumPy.
RankWarning: Polyfit may be poorly conditioned

[mf2k (Frank Schima)]

This appears to be working now. Probably due to a fix to another port in the build process.