> [315] Found ''
> (eval):3: [BUG] Segmentation fault
> ruby 1.9.1p243 (2009-07-16 revision 24175) [i386-mingw32]

I get this too.

1.8.6 mingw

...
[543] Found 'M'
[544] Found 'Default IME'
(eval):3: [BUG] Segmentation fault
ruby 1.8.6 (2009-03-31) [i386-mingw32]

1.9.1 mingw

[544] Found 'Default IME'
(eval):3: [BUG] Segmentation fault
ruby 1.9.1p243 (2009-07-16 revision 24175) [i386-mingw32]

-- control frame ----------
c:0005 p:---- s:0019 b:0019 l:000018 d:000018 CFUNC  :call
c:0004 p:0016 s:0013 b:0013 l:000012 d:000012 METHOD (eval):3
c:0003 p:0116 s:0008 b:0008 l:00227c d:00109c EVAL   test3.rb:32
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
c:0001 p:0000 s:0002 b:0002 l:00227c d:00227c TOP

-r