--- bash-3.1/subst.c	2006/05/24 06:24:44	1.1
+++ bash-3.1/subst.c	2006/05/24 06:25:15
@@ -5524,6 +5524,7 @@ parameter_brace_substring (varname, valu
       temp = (char *)NULL;
     }
 
+  this_command_name = temp;
   return temp;
 }