https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77339
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> --- I'm pretty sure this started with r181118: commit 370478b178a3bdf01988c16782c90add8aea26aa Author: dodji <dodji@138bc75d-0d04-0410-961f-82ee72b054a4> Date: Mon Nov 7 21:28:50 2011 +0000 PR c++/45114 - Support C++11 alias-declaration