More usefully, the slot is now used for XS versioning protection, which
means that we can be confident that nothing out there is using it for data.
Reported as [CPAN #102909].
+ * Avoid t/recurse.t failing because Test::More::is() has been refactored and
+ is now larger than it was. [CPAN #102910].
0.79_51 2015-02-28 nicholas
* as of 5.20.0, s/// is no longer a reliable test for OOK [CPAN #95493]