> The current fromC array code will do the "magic" casting and
> martialling even when num_foo variable is 0.  Go crashes when doing
> the cast.
>
> Furthermore, the current toC array code will convert a nil slice into
> a zero-length malloc.  The resulting pointer is non-NULL, and confuses
> libxl.
>
> Only do array marshalling if the number of elements is non-zero;
> otherwise, leave the target pointer empty (nil for Go slices, NULL for
> C arrays).
>
> The toC half of this should be folded into "golang/xenlight:
> implement array Go to C marshaling".

Looks good to me. I will make the toC change when I send v5 of my series.

-NR

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