re PR c++/22464 (ICE on classes in template functions which attempt closure)

re PR c++/22464 (ICE on classes in template functions which attempt closure)

	PR c++/22464
	* semantics.c (finish_id_expression): Issue errors about uses of
	local variables in containing functions even in templates.
	PR c++/22180
	* call.c (build_new_method_call): Correct pretty-printing of
	destructor names.
	* pt.c (tsubst_qualified_id): Recognize invalid uses of "~T" as an
	identifier.
	PR c++/23694
	* decl.c (start_method): Return error_mark_node for errors.
	PR c++/23307
	* pt.c (push_template_decl_real): Complain about attempts to
	declare template variables.
	PR c++/22352
	* pt.c (tsubst_template_parms): Set processing_template_decl while
	processing the parameters.
	(tsubst_decl): Set processing_template_decl when substituting into
	a TEMPLATE_DECL.
	PR c++/22405
	* pt.c (most_specialized_instantiation): Robustify.
	PR c++/22464
	* g++.dg/template/crash/41.C: New test.
	PR c++/22180
	* g++.dg/template/crash40.C: New test.
	PR c++/23694
	* g++.dg/parse/friend5.C: New test.

	PR c++/23307
	* g++.dg/template/crash38.C: New test.

	PR c++/22352
	* g++.dg/template/friend38.C: New test.

	PR c++/22405
	* g++.dg/template/crash39.C: New test.

From-SVN: r105365