PR c++/11509
	* pt.c (dependent_scope_ref_p): New function.
	(value_dependent_expression_p): Use it.
	(type_dependent_expression_p): Likewise.

	* pt.c (tsubst_friend_function): Use reregister_specialization.

	PR c++/11509
	* g++.dg/template/crash6.C: New test.

From-SVN: r69363