Umm... so what happens if something external has snagged the old hash value and the split/recalculate happens?
I was assuming that the only thing they can use the old hash value which affects the internals of the hash is for is passing back into a hv function as a pre-computed hash. And for a re-hashed hash the hv functions are throwing away any passed in pre-computed values.
You can envisage a scenario where external routines are taking the hash values and sniffing around the guts of a hash without using the hv functions?
Ah, I missed the 'throwing away' part. It just stuck in my mind that I'd seen someone say that mod_perl 2 keeps hold of the precomputed hash value.
However, I bet there is at least one XSUB out there that does sniff around...
-- Alan Burlison --
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