STINNER Victor added the comment:

Come on, yet another crash from property_descr_get()??? It's the 3rd time... Do 
we really need this micro-optimization?

Previous bugs and workarounds:

- issue #26811
- issue #24276

Using the FASTCALL calling convention, no temporary tuple is created to pass 
arguments if you use the _PyObject_FastCall() API and if the called function 
supports this calling convention.

Sadly, namedtuple.attr uses operator.itergetter, itemgetter_call() doesn't 
support the FASTCALL, and my tp_fastcall patch was rejected: issue #29259.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue30156>
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