a)  running spec:ci using macrake segmentation fault

$ macrake spec:ci
unknown: warning: already initialized constant TOPDIR
unknown: warning: already initialized constant CONFIG
unknown: warning: already initialized constant MAKEFILE_CONFIG
Segmentation fault

b)  running spec:ci using rake aborts 

$ rake spec:ci
(in /Users/conradwt/macruby.dir/projects/macruby-trunk)
./mspec/bin/mspec ci -B ./spec/macruby.mspec  :full
MacRuby version 0.5 (ruby 1.9.0) [universal-darwin10.0, x86_64]
.............................................................................................................................................................2009-10-07 23:02:23.167 macruby[11134:1b07] *** Terminating app due to uncaught exception 'NameError', reason: 'undefined method `pwd' for module `RbConfig''
*** Call stack at first throw:
(
0   CoreFoundation                      0x00007fff82a995a4 __exceptionPreprocess + 180
1   libobjc.A.dylib                     0x00007fff86ae3313 objc_exception_throw + 45
2   libmacruby.dylib                    0x000000010017a185 rb_vm_raise + 197
3   libmacruby.dylib                    0x000000010003f8c9 rb_exc_raise + 9
4   libmacruby.dylib                    0x000000010003c3d4 rb_name_error + 260
5   libmacruby.dylib                    0x0000000100040154 rb_print_undef + 196
6   libmacruby.dylib                    0x000000010012065d rb_export_method + 157
7   libmacruby.dylib                    0x0000000100120d09 rb_mod_modfunc + 441
8   libmacruby.dylib                    0x000000010016d02f rb_vm_dispatch + 5679
9   fileutils.rbo                       0x00000001011bdea5 __ruby_scope1 + 197
)
terminate called after throwing an instance of 'NSException'
rake aborted!
Command failed with status (): [./mspec/bin/mspec ci -B ./spec/macruby.msp...]