re PR c++/80449 (ICE reporting failed partial class template specialization class template argument deduction)

/cp
2017-10-23  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/80449
	* semantics.c (finish_compound_literal): Check do_auto_deduction
	return value for error_mark_node.

/testsuite
2017-10-23  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/80449
	* g++.dg/cpp1z/class-deduction46.C: New.

From-SVN: r254026