[Bug c++/53215] Warn if orphaned memory is created by ignoring return value of new

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53215

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Is it worth warning? Is this something that people get wrong often? I doubt it.