[Bug c++/85548] Zero-initialization of padding bits of an aggregate class (class A) member of a non-aggregate class (class B) is not performed when B is value-initialized.

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85548

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-04-27
     Ever confirmed|0                           |1

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Because the standard says so:

- if T is a (possibly cv-qualified) non-union class type, its padding bits
(6.7) are initialized to zero bits and each non-static data member, each
non-virtual base class subobject, and, if the object is not a base class
subobject, each virtual base class subobject is zero-initialized;