re PR c++/27309 (ICE on invalid constructor definition)

re PR c++/27309 (ICE on invalid constructor definition)

	PR c++/27309
	* class.c (add_method): Call grok_special_member_properties.
	* decl.c (grokdeclarator): Don't call it here.
	(copy_fn_p): A TEMPLATE_DECL is never a copy constructor or
	assignment operator.  Set TYPE_HAS_CONSTURCTOR if DECL is a
	constructor.
	(start_method): Don't call grok_special_member_properties.
	* method.c (implicitly_declare_fn): Likewise.
	* pt.c (instantiate_class_template): Likewise.
	* decl2.c (grokfield): Likewise.
	PR c++/27309
	* g++.dg/parser/ctor5.C: New test.

From-SVN: r113473