- Add a method that determines whether a number is an exact power of 2. (amulhern)
    - Put size values in Size universe eagerly. (amulhern)
    - Update minSize method headers. (amulhern)
    - Remove _minSize assignment to 0 where it's inherited from superclass. (amulhern)
    - Make _minInstanceSize, a source of minSize() value, always a Size. (amulhern)
    - Fix int * Size operation and add tests (#1158792) (bcl)
    - getArch should return ppc64 or ppc64le (#1159271) (bcl)
    - Pack data for the wait_for_entropy callback (vpodzime)
    - Allow the wait_for_entropy callback enforce continue (vpodzime)