https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69730
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I suspect it's because x() returns an rvalue B (a copy) which you then instruct
to
return a reference to its member which you bind to x. But that copy of B dies
after
const double & x = a.x().value();
and thus the content of what x refers to is gone.
