https://gcc.gnu.org/ml/gcc-patches/2018-11/msg00085.html
	gcc/cp/
	* decl.c (duplicate_decls): Refactor checks.
	gcc/testsuite/
	* g++.dg/lookup/crash6.C: Adjust error
	* g++.dg/parse/crash38.C: Likewise.

From-SVN: r265744