re PR c++/64129 (ICE on invalid: in grokfndecl, at cp/decl.c:7658)

	PR c++/64129
	* decl.c (grokdeclarator): Recover from variable template
	specialization declared as function.

From-SVN: r218557

gcc/cp/ChangeLog

 2014-12-09  Jason Merrill  <jason@redhat.com>
 
+	PR c++/64129
+	* decl.c (grokdeclarator): Recover from variable template
+	specialization declared as function.
+
 	PR c++/64222
 	* parser.c (cp_parser_unqualified_id): Don't declare fname while
 	parsing function parms.

gcc/cp/decl.c

@@ -10739,6 +10739,19 @@ grokdeclarator (const cp_declarator *declarator,
 		return error_mark_node;
 	      }
 
+	    if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
+	      {
+		tree tmpl = TREE_OPERAND (unqualified_id, 0);
+		if (variable_template_p (tmpl))
+		  {
+		    error ("specialization of variable template %qD "
+			   "declared as function", tmpl);
+		    inform (DECL_SOURCE_LOCATION (tmpl),
+			    "variable template declared here");
+		    return error_mark_node;
+		  }
+	      }
+
 	    /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node.  */
 	    function_context = (ctype != NULL_TREE) ?
 	      decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;

gcc/testsuite/g++.dg/parse/error56.C

+// PR c++/64129
+
+template <0> int __copy_streambufs_eof; // { dg-error "" }
+class {
+    friend __copy_streambufs_eof <> ( // { dg-error "" }