diff -r f111a6986c22 -r 8fcea60029de stage4/generate_iec/generate_iec.cc
--- a/stage4/generate_iec/generate_iec.cc	Wed Jun 01 14:02:16 2011 +0200
+++ b/stage4/generate_iec/generate_iec.cc	Fri Jun 03 17:14:24 2011 +0100
@@ -1530,7 +1530,9 @@
     symbol->label->accept(*this);
     s4o.print(": ");
   }
-  symbol->il_instruction->accept(*this);
+  if (symbol->il_instruction != NULL) {
+    symbol->il_instruction->accept(*this);
+  }  
   return NULL;
 }