From: "H.Yamamoto" <ocean@...2.ccsnet.ne.jp>
Date: 2005-04-25T11:00:44+09:00
Subject: Re: profiler.rb Schroedinbug

>A ruby program with the single instruction "require 'profile'" 
>(or with a small program attached afterward) fails on Ruby 1.8 
>and 1.9.
>
>c:/ruby/lib/ruby/1.8/profiler.rb:30: undefined method `[]' for 
>nil:NilClass (NoMethodError)

Maybe, did you require "profile.rb" on irb?

E:\ruby-cvs\bcc32>irb19
irb(main):001:0> require "profile"
  %   cumulative   self              self     total
 time   seconds   seconds    calls  ms/call  ms/call  name
1600.00     0.16      0.16        1   160.00   160.00  Profiler__.start_profile
  0.00     0.16      0.00        1     0.00     0.00  IRB::Irb#signal_status
  0.00     0.16      0.00        1     0.00     0.00  RubyLex#each_top_level_sta
tement
  0.00     0.16      0.00        1     0.00   160.00  IRB::WorkSpace#evaluate
  0.00     0.16      0.00        1     0.00     0.00  IRB.start
  0.00     0.16      0.00        2     0.00     0.00  Module#===
  0.00     0.16      0.00        1     0.00     0.00  IRB::Context#evaluate
  0.00     0.16      0.00        1     0.00    10.00  #toplevel
  0.00     0.16      0.00        1     0.00     0.00  IRB::Irb#eval_input
E:/ruby-cvs/ruby/lib/profiler.rb:27: undefined method `[]' for nil:NilClass (NoM
ethodError)
        from E:/ruby-cvs/ruby/lib/profiler.rb:5:in `start'
        from E:/ruby-cvs/ruby/lib/irb.rb:51:in `start'
        from ../ruby/bin/irb:13

I couldn't reproduce the problem outside of irb.

E:\ruby-cvs\bcc32>ruby19 -rprofile -e ""
  %   cumulative   self              self     total
 time   seconds   seconds    calls  ms/call  ms/call  name
400.00     0.04      0.04        1    40.00    40.00  Profiler__.start_profile
  0.00     0.04      0.00        1     0.00    10.00  #toplevel