Gregory P. Smith <g...@krypto.org> added the comment:

notably, C99 variable length arrays syntax is not mentioned as allowed in 
https://www.python.org/dev/peps/pep-0007/.  If we want to use VLAs, that should 
be clarified.  But both our solutions should work with [1] instead of [] which 
is allowed by the ubsan checker.

it means keeping the annoying "- Py_MEMBER_SIZE(...)" of the array on all size 
calculations (but because of that the patch is smaller).

----------
Added file: 
https://bugs.python.org/file47543/maybe-less-horrible-no-vla-gps02.patch

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<https://bugs.python.org/issue33312>
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