windows xp 下安裝了 ruby ruby 1.9.3p392 (2013-02-22) [i386-mingw32] 安裝了 debugger gem install debugger
在 irb 下 require‘debugger’不成功,顯示
NameError: uninitialized constant Debugger::LocalInterface::Readline
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/debugger-1.3.3/lib/ruby-debug/i
nterface.rb:55:in block (2 levels) in initialize'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/debugger-1.3.3/lib/ruby-debug/i
nterface.rb:53:in
each'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/debugger-1.3.3/lib/ruby-debug/i
nterface.rb:53:in block in initialize'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/debugger-1.3.3/lib/ruby-debug/i
nterface.rb:52:in
open'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/debugger-1.3.3/lib/ruby-debug/i
nterface.rb:52:in initialize'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/debugger-1.3.3/lib/ruby-debug/p
rocessor.rb:61:in
new'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/debugger-1.3.3/lib/ruby-debug/p
rocessor.rb:61:in initialize'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/debugger-1.3.3/lib/ruby-debug.r
b:9:in
new'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/debugger-1.3.3/lib/ruby-debug.r
b:9:in <module:Debugger>'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/debugger-1.3.3/lib/ruby-debug.r
b:8:in
'
from C:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_requir
e.rb:110:in require'
from C:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_requir
e.rb:110:in
rescue in require'
from C:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_requir
e.rb:35:in require'
from (irb):1
from C:/Ruby193/bin/irb:12:in
require'
from C:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_requir
e.rb:45:in
require'
from (irb):2
from C:/Ruby193/bin/irb:12:in `'
是什麼原因呀,求幫助