on Wed, 24 May 2023 18:12:05 -0400 you (Rich Felker <dalias@libc.org>)
wrote:

> I was reading the spec and came across:
> 
>     "If p is a null pointer, an alignment of zero is returned."
> 
> and:
> 
>     "NOTE An alignment of zero indicates that the tested pointer
>     cannot be used to access an object of any type."
> 
> I think this precludes your version with ctzll, but works fine with
> the replacement I proposed.

good catch


Thanks
Jₑₙₛ

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