https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109443
--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> --- No: This elision of copy/move operations, called copy elision, is permitted in the following circumstances (which may be combined to eliminate multiple copies): — in a return statement in a function with a class return type, when the expression is the name of a non-volatile object with automatic storage duration (other than a function parameter or a variable introduced by the exception-declaration of a handler (14.4)) with the same type (ignoring cv-qualification) as the function return type, the copy/move operation can be omitted by constructing the object directly into the function call’s return object "Other than a function parameter" means the return object must be at a distinct address.
