https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99845
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |INVALID Status|NEW |RESOLVED --- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Keith Halligan from comment #0) > class MyType { > public: > void* operator new[](size_t sz, const std::nothrow_t& nt) { Your bug is here. This need to be noexcept. Passing std::nothrow_t doesn't tell the compiler that this is a nothrow-new, only making it noexcept does that. So the compiler assumes this will throw on failure, and so a non-exceptional return is always non-null.