|Child||0c2d4e2c, 865ddc26, 6360202f, f5bb0553|
[TASK] Fix unit tests failing on PHP 5.6
Some unit tests failed under PHP 5.6 because an argument to be passed by
reference was by value.
The affected tests now use ``_callRef`` in the ``AccessibleMock``.
This should solve those issues on HHVM as well.
Releases: master, 2.3, 2.2