<p>Found and interesting comment[1]  related to calling memcpy(dst->s, NULL, 0). </p>

<p>[1] <a href="http://stackoverflow.com/questions/5243012/is-it-guaranteed-to-be-safe-to-perform-memcpy0-0-0">http://stackoverflow.com/questions/5243012/is-it-guaranteed-to-be-safe-to-perform-memcpy0-0-0</a></p>

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