[MacPorts] #61490: py38-matplotlib: RuntimeError: Polyfit sanity test emitted a warning, most likely due to using a buggy Accelerate backend.

[MacPorts]

#61490: py38-matplotlib: RuntimeError: Polyfit sanity test emitted a warning, most
likely due to using a buggy Accelerate backend.
--------------------+------------------------------------
 Reporter:  mf2k    |      Owner:  (none)
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  py-numpy py-matplotlib
--------------------+------------------------------------
 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 building py-matplotlib but may be in py-numpy.

-- 
Ticket URL: <https://trac.macports.org/ticket/61490>
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