dnl @ ../doc/m4.texi:2235: Origin of test
dnl @ expected status: 0
dnl @ extra options: 
dnl @ Copyright (C) 2006, 2007, 2008, 2009 Free Software
dnl @ Foundation, Inc.
dnl @ This file is free software; the Free Software Foundation
dnl @ gives unlimited permission to copy and/or distribute it
dnl @ with or without modifications, as long as this notice
dnl @ is preserved.
define(`a', `popdef(`a')1')pushdef(`a', `2$*')dnl
debugmode(`t')a(popdef(`a')a)
dnl @error{}m4trace: -2- popdef
dnl @error{}m4trace: -2- a
dnl @error{}m4trace: -2- popdef
dnl @error{}m4trace: -1- a
dnl @result{}21