[Bug c++/71913] [5/6/7 Regression] Missing copy elision with operator new

[renlin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71913

--- Comment #11 from Renlin Li <renlin at gcc dot gnu.org> ---
(In reply to Christophe Lyon from comment #10)
> I've noticed that something similar to what Renlin suggested was committed
> to trunk as r238728.
> 
> Could this testcase fix be backported to the release branches too?

Yes, the failure can still be observed in branch 49 and 5.
It will be good to backport the fix to those branches.