https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93470
--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:72a9fd209b6db3b5f81fbb008e22ea93c00465e5 commit r10-6288-g72a9fd209b6db3b5f81fbb008e22ea93c00465e5 Author: Jonathan Wakely <jwak...@redhat.com> Date: Tue Jan 28 13:24:09 2020 +0000 libstdc++: Avoid using sizeof with function types (PR 93470) PR libstdc++/93470 * include/bits/refwrap.h (reference_wrapper::operator()): Restrict static assertion to object types.