https://gcc.gnu.org/ml/gcc-patches/2018-03/msg00973.html
	PR c++/84970
	* cp-tree.h (lookup_list_keep): Declare.
	* tree.c (lookup_list_keep): New, broken out of ...
	(build_min): ... here.  Call it.
	* decl.c (cp_finish_decl): Call lookup_list_keep.

	PR c++/84970
	* g++.dg/lookup/pr84970.C: New.

From-SVN: r258685