https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79326
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|mistakenly rejects valid |mistakenly rejects valid |C++ code on |GNU C++ (typeof) code on |x86_64-linux-gnu |x86_64-linux-gnu --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- This is a GNU C++ extension. IIRC a bug like this was closed as won't fix as decltype works.