The SV is not intended to be modifiable. It's just a container for an opaque value. The only "manipulation" being done is to cast the value back to a pointer.

Have you tried running Perl on a 32-bit system configured for /3GB?

No. Are you saying that sv = (SV*)(IV)sv fails then? If so, that's a bug. IV is guaranteed to be large enough to hold a pointer.

In reply to Re^6: SvUV vs SvIV for pointers in SVs, typemap by ikegami
in thread SvUV vs SvIV for pointers in SVs, typemap by patcat88

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