http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52901
Daniel Krügler <daniel.kruegler at googlemail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |daniel.kruegler at | |googlemail dot com --- Comment #1 from Daniel Krügler <daniel.kruegler at googlemail dot com> 2012-04-08 13:48:57 UTC --- I don't see what this example is supposed to demonstrate. the two lines X&& x1 = f(); and X&& y1 = f(); produce references to invalid memory, any access to that is undefined behaviour. You cannot impose any reliable constraints on the values such references.