Index: frontend-passes.c
===================================================================
--- frontend-passes.c	(Revision 169491)
+++ frontend-passes.c	(Arbeitskopie)
@@ -654,6 +654,12 @@
 		WALK_SUBEXPR (a->expr);
 	      break;
 
+	    case EXEC_COMPCALL:
+	      WALK_SUBEXPR ((*c)->expr1);
+	      for (a = (*c)->expr1->value.compcall.actual; a; a = a->next)
+		WALK_SUBEXPR (a->expr);
+	      break;
+
 	    case EXEC_SELECT:
 	      WALK_SUBEXPR ((*c)->expr1);
 	      for (b = (*c)->block; b; b = b->block)