That's the SV addresses that are different. Try Devel::Peek's Dump function to see what the PV is? I suspect this is supposed to be copy-on-write (COW), but that the XS code is just overwriting the (still-shared) data area without doing the correct COW API stuff.

In reply to Re^3: Text::ExtractWords exhibits incomprehensible behavior? by etj
in thread Text::ExtractWords exhibits incomprehensible behavior? by ibm1620

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