[Bug c++/118631] Public class member as const reference to protected member

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118631

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Most likely you forgot a copy constructor. A default copy constructor will
point the new msets to the old msets_ .