re PR objc++/28434 (ICE with invalid protocol)

	PR obj-c++/28434
	* objc-act.c (lookup_and_install_protocols): Skip error_mark_nodes.

	* obj-c++.dg/proto-error-1.mm: New test.

From-SVN: r115599

gcc/objc/ChangeLog

+2006-07-19  Volker Reichelt  <reichelt@igpm.rwth-aachen.de>
+
+	PR obj-c++/28434
+	* objc-act.c (lookup_and_install_protocols): Skip error_mark_nodes.
+
 2006-06-06  Mike Stump  <mrs@apple.com>
 
 	* objc-act.c: Remove prototype for objc_build_volatilized_type.

gcc/objc/objc-act.c

@@ -1433,12 +1433,12 @@ lookup_and_install_protocols (tree protocols)
       tree ident = TREE_VALUE (proto);
       tree p = lookup_protocol (ident);
 
-      if (!p)
-	error ("cannot find protocol declaration for %qs",
-	       IDENTIFIER_POINTER (ident));
-      else
+      if (p)
 	return_value = chainon (return_value,
 				build_tree_list (NULL_TREE, p));
+      else if (ident != error_mark_node)
+	error ("cannot find protocol declaration for %qs",
+	       IDENTIFIER_POINTER (ident));
     }
 
   return return_value;

gcc/testsuite/ChangeLog

+2006-07-19  Volker Reichelt  <reichelt@igpm.rwth-aachen.de>
+
+	PR obj-c++/28434
+	* obj-c++.dg/proto-error-1.mm: New test.
+
 2006-07-18  Mark Mitchell  <mark@codesourcery.com>
 
 	PR c++/28337

gcc/testsuite/obj-c++.dg/proto-error-1.mm

+// PR obj-c++/28434
+// { dg-do compile }
+
+Class<> c;  // { dg-error "identifier" }