when i debug a program use rdebug command,but it doesn't work,as follow:

C:\Documents and Settings\wangzhili>rdebug E:\rdebug\triangle.rb
E:/rdebug/triangle.rb:8
def triangle(n)
(rdb:1) break 4
c:/ruby/lib/ruby/gems/1.8/gems/linecache-0.43/lib/tracelines.rb:27: [BUG] Segmen
tation fault
ruby 1.8.6 (2007-09-24) [i386-mswin32]


This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.

Date: 2009-01-06 15:40
Sender: Winston Wang

*** LOCAL GEMS ***

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fxri (0.3.6)
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fxruby (1.6.12)
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log4r (1.0.5)
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rake (0.7.3)
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ruby-debug (0.10.3)
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ruby-debug-base (0.10.3)
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ruby-debug-ide (0.4.3)
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win32-api (1.0.4)
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win32-dir (0.3.2)
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win32-file (0.5.4)
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