From: Eric Hodel <drbrain@...7.net>
Date: 2011-05-18T05:20:16+09:00
Subject: [ruby-core:36289] [Ruby 1.9 - Feature #4720] Added documentation for lib/tracer.rb


Issue #4720 has been updated by Eric Hodel.

Target version changed from 1.9.2 to 1.9.3

I also do not see tracer working on 1.9.3dev revision 31612.  Please file a separate issue for this.

PS: please wrap documentation at 80 columns and trim trailing whitespace
----------------------------------------
Feature #4720: Added documentation for lib/tracer.rb
http://redmine.ruby-lang.org/issues/4720

Author: Richard Ramsden
Status: Closed
Priority: Normal
Assignee: Eric Hodel
Category: DOC
Target version: 1.9.3


I decided to document lib/tracer.rb since it was lying around in stdlib. 
However, it behaves differently on 1.9.2 vs 1.9.3....
I based my example in the patch on ruby-1.9.2-head:

���  ruby git:(trunk) ��� ruby --version
ruby 1.9.2p204 (2011-05-12 revision 31519) [x86_64-linux]
���  ruby git:(trunk) ��� ruby -rtracer example.rb
#0:internal:lib/rubygems/custom_require:38:Kernel:<: -
#0:example.rb:1::-: class A
#0:example.rb:1::C: class A
#0:example.rb:2::-:   def square(n)
#0:example.rb:5::E: end
#0:example.rb:7::-: A.new.square(5)
#0:example.rb:2:A:>:   def square(n)
#0:example.rb:3:A:-:     n*n
#0:example.rb:4:A:<:   end

Whereas 1.9.3dev doesn't seem to output anything?

���  ruby git:(trunk) ��� ruby --version
ruby 1.9.3dev (2011-05-17 trunk 31604) [x86_64-linux]
���  ruby git:(trunk) ��� ruby -rtracer example.rb
���  ruby git:(trunk) ���

Not sure if this is a bug or intended in 1.9.3dev...?

From what I could dig up it seems
1.9.2-head is displaying the correct behavior:

http://redmine.ruby-lang.org/issues/3843
http://redmine.ruby-lang.org/issues/3749
http://www.ruby-lang.org/ja/man/html/tracer.html
http://en.wikibooks.org/wiki/Ruby_Programming/Standard_Library/Tracer

thoughts?


-- 
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