Unlike C, the end of a Perl string is determined by a field outside of the string's payload. This allows Perl strings to contain any characters, including NUL.

As protection against XS authors who treat the string payload as a C string, Perl strings usually have an extra byte allocated, set to NUL. As I understand it, this is a courtesy, not a guarantee.

In reply to Re^8: Why do poisoned null attacks still work ? by ikegami
in thread Why do poisoned null attacks still work ? by pubnoop

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