re PR c++/84663 (internal compiler error: tree check: expected array_type, have error_mark in cp_complete_array_type, at cp/decl.c:8334)

	PR c++/84663
	* decl.c (cp_complete_array_type): Check error_mark_node.

	* g++.dg/parse/array-size3.C: New test.

From-SVN: r258148