[Bug c++/49974] missing warning for indirectly returning reference to local/temporary

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49974

--- Comment #7 from Marc Glisse <glisse at gcc dot gnu.org> ---
We currently warn on all the examples involving X, with -O2. We don't for Y, we
might if there was a caller and the dangling reference was used there...