re PR c/65228 (ICE: expected tree that contains ‘decl minimal’ structure, have…

re PR c/65228 (ICE: expected tree that contains ‘decl minimal’ structure, have ‘error_mark’ in start_decl)

	PR c/65228
	* c-decl.c (start_decl): Return NULL_TREE if decl is an error node.

	* gcc.dg/pr65228.c: New test.

From-SVN: r221056

gcc/c/ChangeLog

+2015-02-27  Marek Polacek  <polacek@redhat.com>
+
+	PR c/65228
+	* c-decl.c (start_decl): Return NULL_TREE if decl is an error node.
+
 2015-02-14  Marek Polacek  <polacek@redhat.com>
 
 	PR c/64768

gcc/c/c-decl.c

@@ -4460,8 +4460,8 @@ start_decl (struct c_declarator *declarator, struct c_declspecs *declspecs,
   decl = grokdeclarator (declarator, declspecs,
 			 NORMAL, initialized, NULL, &attributes, &expr, NULL,
 			 deprecated_state);
-  if (!decl)
-    return 0;
+  if (!decl || decl == error_mark_node)
+    return NULL_TREE;
 
   if (expr)
     add_stmt (fold_convert (void_type_node, expr));

gcc/testsuite/ChangeLog

+2015-02-27  Marek Polacek  <polacek@redhat.com>
+
+	PR c/65228
+	* gcc.dg/pr65228.c: New test.
+
 2015-02-27  Kai Tietz  <ktietz@redhat.com>
 
 	PR c/35330

gcc/testsuite/gcc.dg/pr65228.c

+/* PR c/65228 */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+__auto_type a = b; /* { dg-error "undeclared" } */
+
+void
+f (void)
+{
+  __auto_type c = d; /* { dg-error "undeclared" } */
+}