fixing nasty & scarry bug: do not assign a pointer to *_nil to a result pointer variable, otherwise, we risk overwriting our crucial *_nil constants!
fixing nasty & scarry bug:
do not assign a pointer to *_nil to a result pointer variable,
otherwise, we risk overwriting our crucial *_nil constants!

TODO:
declare all C constants as such to have the C compiler check
that they indeed remain constant?

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