From: Dave Thomas <redmine@...>
Date: 2010-09-17T07:39:49+09:00
Subject: [ruby-core:32448] [Ruby 1.9-Bug#3843][Open] ruby -r tracer prog.rb no longer tracers prog.rb

Bug #3843: ruby -r tracer prog.rb no longer tracers prog.rb
http://redmine.ruby-lang.org/issues/show/3843

Author: Dave Thomas
Status: Open, Priority: Normal
Category: lib
ruby -v: 1.9.2

The problem appears to be at the end of tracer.rb:



if $0 == __FILE__
  # direct call

  $0 = ARGV[0]
  ARGV.shift
  Tracer.on
  require $0
elsif caller.size <= 1 
  Tracer.on
end

IN 1.9.2, caller() at this point is 2 deep: 

["<internal:lib/rubygems/custom_require>:29:in `require'", "<internal:lib/rubygems/custom_require>:29:in `require'"]


The following change seems to fix it, but it feels a little hacky..

if $0 == __FILE__
  # direct call

  $0 = ARGV[0]
  ARGV.shift
  Tracer.on
  require $0
elsif caller.size <= 2 && caller.all? {|place| place =~ /custom_require/}
  Tracer.on
end




Dave


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