PR c++/89511 - ICE with using-declaration and unscoped enumerator.

	* parser.c (cp_parser_using_declaration): For an unscoped enum
	only use its context if it's not a function declaration.

	* g++.dg/cpp0x/using-enum-3.C: New test.

From-SVN: r269262

gcc/cp/ChangeLog

+2019-02-27  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/89511 - ICE with using-declaration and unscoped enumerator.
+	* parser.c (cp_parser_using_declaration): For an unscoped enum
+	only use its context if it's not a function declaration.
+
 2019-02-27  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/89488

gcc/cp/parser.c

@@ -19412,7 +19412,8 @@ cp_parser_using_declaration (cp_parser* parser,
 						  /*is_declaration=*/true);
   if (!qscope)
     qscope = global_namespace;
-  else if (UNSCOPED_ENUM_P (qscope))
+  else if (UNSCOPED_ENUM_P (qscope)
+	   && !TYPE_FUNCTION_SCOPE_P (qscope))
     qscope = CP_TYPE_CONTEXT (qscope);
 
   if (access_declaration_p && cp_parser_error_occurred (parser))

gcc/testsuite/ChangeLog

+2019-02-27  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/89511 - ICE with using-declaration and unscoped enumerator.
+	* g++.dg/cpp0x/using-enum-3.C: New test.
+
 2019-02-27  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/89280

gcc/testsuite/g++.dg/cpp0x/using-enum-3.C

+// PR c++/89511
+// { dg-do compile { target c++11 } }
+
+void f ()
+{
+  enum e { a };
+  using e::a; // { dg-error "not a namespace or unscoped enum" }
+}
+
+struct S {
+  enum E { A };
+  using E::A; // { dg-error "type .S. is not a base type for type .S." }
+};
+
+namespace N {
+  enum E { B };
+}
+
+struct T {
+  using N::E::B; // { dg-error "using-declaration for non-member at class scope" }
+};