--- a/stage4/generate_c/generate_c_il.cc	Wed Jun 01 14:02:16 2011 +0200
+++ b/stage4/generate_c/generate_c_il.cc	Fri Jun 03 17:14:24 2011 +0100
@@ -751,7 +751,9 @@
     s4o.print(":\n");
     s4o.print(s4o.indent_spaces);
   }
-  symbol->il_instruction->accept(*this);
+  if (NULL != symbol->il_instruction) {
+    symbol->il_instruction->accept(*this);
+  }  
   return NULL;
 }