https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84125
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> --- commit e00197cb8789a850b76bfc2bed83d1c510aa65bb Author: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4> Date: Thu Jan 11 19:08:41 2018 +0000 PR c++/82728 - wrong -Wunused-but-set-variable PR c++/82799 PR c++/83690 * call.c (perform_implicit_conversion_flags): Call mark_rvalue_use. * decl.c (case_conversion): Likewise. * semantics.c (finish_static_assert): Call perform_implicit_conversion_flags. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@256550 138bc75d-0d04-0410-961f-82ee72b054a4