--- a/graal/com.oracle.truffle.codegen.processor/src/com/oracle/truffle/codegen/processor/AbstractParser.java	Wed Mar 13 11:32:43 2013 +0100
+++ b/graal/com.oracle.truffle.codegen.processor/src/com/oracle/truffle/codegen/processor/AbstractParser.java	Wed Mar 13 19:58:28 2013 +0100
@@ -58,12 +58,22 @@
             if (!context.getTruffleTypes().verify(context, element, mirror)) {
                 return null;
             }
-            return parse(element, mirror);
+            M model = parse(element, mirror);
+            if (model == null) {
+                return null;
+            }
+
+            model.emitMessages((TypeElement) element, log);
+            return filterErrorElements(model);
         } finally {
             this.roundEnv = null;
         }
     }
 
+    protected M filterErrorElements(M model) {
+        return model.hasErrors() ? null : model;
+    }
+
     protected abstract M parse(Element element, AnnotationMirror mirror);
 
     public abstract Class<? extends Annotation> getAnnotationType();