https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54366 Bug 54366 depends on bug 67853, which changed state.
Bug 67853 Summary: decltype of parenthesized xvalue does not correctly yield rvalue-reference https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67853 What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED