https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71892
--- Comment #11 from Kern Sibbald <kern at sibbald dot com> --- I recently discussed both of these "optimizations" with Bjarne Stroustrup and his comment about deleting the memset() when overriding the new() functions was: Looks like a bug to me His comment about deleting the test for a NULL class pointer was: Yes. According to the standard no object can exists at address 0, so the optimization seems valid. So, I repeat: please remove your "bug" that deletes memset() code and causes program failures. Despite what he says about removing the NULL pointer, when you do so, you make it impossible with standard C++ to prevent a seg fault is someone calls a class function (by error or on purpose) with a NULL pointer. Please rmove this useless optimization. Both of your optimizations do not make sense, they give no practical improvement to the compiler and only serve to introduce failures to programs that otherwise would run correctly.
