[Bug c++/13118] [ABI] Missed covariant return thunk

[bangerth at dealii dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Missed covariant return     |[ABI] Missed covariant
                   |thunk                       |return thunk


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13118