PR c++/84820 - no error for invalid qualified-id.

	* parser.c (cp_parser_make_indirect_declarator): Don't wrap
	cp_error_declarator.

From-SVN: r258549

gcc/cp/ChangeLog

 2018-03-14  Jason Merrill  <jason@redhat.com>
 
+	PR c++/84820 - no error for invalid qualified-id.
+	* parser.c (cp_parser_make_indirect_declarator): Don't wrap
+	cp_error_declarator.
+
 	PR c++/84801 - ICE with unexpanded pack in lambda.
 	* pt.c (check_for_bare_parameter_packs): Don't return early for a
 	lambda in non-template context.

gcc/cp/parser.c

@@ -3823,7 +3823,7 @@ cp_parser_make_indirect_declarator (enum tree_code code, tree class_type,
 				    cp_declarator *target,
 				    tree attributes)
 {
-  if (code == ERROR_MARK)
+  if (code == ERROR_MARK || target == cp_error_declarator)
     return cp_error_declarator;
 
   if (code == INDIRECT_REF)

gcc/testsuite/g++.dg/parse/error21.C

@@ -8,6 +8,5 @@ void foo()
   // Check that we do not complain about an unused
   // compiler-generated variable.
   A& = a; // { dg-error "6:expected unqualified-id before '=' token" "6" }
-  // { dg-error "8:'a' was not declared in this scope" "8" { target *-*-* } .-1 }
 }
 

gcc/testsuite/g++.dg/parse/qualified5.C

+// PR c++/84820
+
+struct A {};
+
+template<int> struct B : A
+{
+  B()
+  {
+    A(&A::foo);			// { dg-error "foo" }
+  }
+};
+
+B<0> b;