iasl crashed with SIGSEGV in __vfprintf_chk()

i was following this guide:

http://ubuntuforums.org/showthread.php?t=1036051&highlight=dsdt

and at the step where i recompiled the dsdt.dsl, it crashed.

ProblemType: Crash
Architecture: amd64
Dependencies:
 libgcc1 1:4.3.3-5ubuntu4
 gcc-4.3-base 4.3.3-5ubuntu4
 findutils 4.4.0-2ubuntu3
 libc6 2.9-4ubuntu3
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/iasl
NonfreeKernelModules: ath_hal nvidia
Package: iasl 20081204-0ubuntu2
ProcCmdline: iasl -tc dsdt.dsl
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
Signal: 11
SourcePackage: acpica-unix
StacktraceTop:
 __vfprintf_chk () from /lib/libc.so.6
 ?? ()
 ?? ()
 ?? ()
 ?? ()
Title: iasl crashed with SIGSEGV in __vfprintf_chk()
Uname: Linux 2.6.28-11-generic x86_64
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare