PR c++/9781, c++/10583, c++/11862
	* decl.c (cp_finish_decl): Exit immediately if decl is an
	error_mark_node.
	* pt.c (push_template_decl_real): Return error_mark_node for
	invalid template declaration of variable.

	* g++.dg/parse/crash13.C: New test.

From-SVN: r72701