Please review asap.
This bug caused clang call pure virtual functions when called from constructor body.
Prazek on Oct 1 2015, 6:48 PM.Authored by
LGTM, but your commit message should be more descriptive than your current summary. Something like:
Ensure that the vptr store in the most-derived constructor is not behind an invariant group barrier. Previously, the base-most vptr store would be the one behind no barrier, and that could result in the creator of the object thinking it had the base-most vtable.