mozilla/rust — pull request #13267 by thestinger (2014-04-02 22:13:04+00:00)
Title: fix Option<~ZeroSizeType>

1778b6361627c5894bf75ffecf427573af02d390 provided the guarantee of no
`exchange_free` calls for ~ZeroSizeType, so a sentinel can now be used
without overhead.

Closes #11998