id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
11520	pointer_iserializer requires operator delete(void*, size_t) for classes that have a specific operator new	Fabian Kislat <fabian.kislat@…>	Robert Ramey	"Serialization of pointers to objects, which have a class specific operator new fails if the class only provides the regular (see https://github.com/boostorg/serialization/blob/master/include/boost/archive/detail/iserializer.hpp#L236)

T::operator delete(void*)

by requiring definition of

T::operator delete(void*, std::size_t)

However, the operator delete with size argument is entirely optional in the C++ standard. The comment in the code says this choice was made because the delete operator with only one argument is a usual deallocator, which the author assumes calls the destructor. This is incorrect in two ways:
a) operator delete never calls the destructor (the delete expression calls the destructor and then operator delete to deallocate the storage, see sec. 5.3.5 of the standard)
b) operator delete with a size argument is a usual delete operator (non-placement), just like the version with one argument.

In fact, it seems that the behaviour may be undefined if both versions of the delete operator are defined (sec. 5.3.5 paragraph 10).

I don't know how to test which of the two operators exists, but it seems safer to me to use the one-argument version. My existing code stopped working after upgrading boost, and I do not have access to the class being serialized. I am using an external non-intrusive serialization function."	Bugs	reopened	To Be Determined	serialization	Boost 1.56.0	Problem