re PR c++/84092 (ICE on C++14 code with variable template: in build_qualified_name, at cp/tree.c:2043)

/cp
2018-01-31  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/84092
	* semantics.c (finish_qualified_id_expr): When handling an
	UNBOUND_CLASS_TEMPLATE only adjust qualifying_class and expr.

/testsuite
2018-01-31  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/84092
	* g++.dg/cpp1y/var-templ57.C: New.

From-SVN: r257242