PR c++/8389
	* pt.c (instantiate_template): Push class scope for member
	functions.
	(get_mostly_instantiated_function_type): Likewise.  Don't call
	tsubst on context.  Remove CONTEXTP and TPARMSP parameters.
	* cp-tree.h (get_mostly_instantiated_function_type): Adjust.
	* mangle.c (write_encoding, write_unqualified_name): Adjust.

	PR c++/8389
	* g++.dg/template/access6.C: New test.

From-SVN: r58950