Buildroot version: v2009.02
Distributor ID:	Ubuntu
Description:	Ubuntu 8.10
Release:	8.10
Codename:	intrepid
Running on x86 32bit Intel P4

Steps to reproduce:

$ tar xjf ../buildroot-2009.02.tar.bz2
$ cd buildroot-2009.02/
$ make menuconfig

Do the following selections:
Package Selection for the target  --->
Graphic libraries and applications (graphic/text)  --->
X Window System server (none)  --->

Select xorg or tinyx
This results in a segmentation fault

---------------------------- SNIP ----------------------------
/bin/sh: line 4: 20924 Segmentation fault      KCONFIG_AUTOCONFIG=package/config/buildroot-config/auto.conf KCONFIG_AUTOHEADER=package/config/buildroot-config/autoconf.h package/config/mconf Config.in


Program received signal SIGSEGV, Segmentation fault
sym_set_tristate_value (sym=0x0, val=yes) at lkc.h:116
116             return sym->curr.tri;

(gdb) bt
#0  sym_set_tristate_value (sym=0x0, val=yes) at lkc.h:116
#1  0x0804b170 in conf (menu=0x9d6d338) at mconf.c:790
#2  0x0804af7e in conf (menu=0x9d33540) at mconf.c:718
#3  0x0804af7e in conf (menu=0x8066520) at mconf.c:718
#4  0x0804b3d5 in main (ac=Cannot access memory at address 0x0
) at mconf.c:932

114     static inline tristate sym_get_tristate_value(struct symbol *sym)
115     {
116             return sym->curr.tri;
117     }

---------------------------- SNIP ----------------------------


I have not checked if this problem exists upstream