[ruby-core:47253] [ruby-trunk - Bug #6899][Open] Flip flop operator broken in IRB (1.9.3, win/osx)

Issue #6899 has been reported by Schwarze (Matthias Schwarze).

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Bug #6899: Flip flop operator broken in IRB (1.9.3, win/osx)
https://bugs.ruby-lang.org/issues/6899

Author: Schwarze (Matthias Schwarze)
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12.0.0]


IRB *sometimes* fails with "NotImplementedError: method `eql?' called on hidden T_STRING object"

When running this code in IRB, you either get the correct bunch of "345..." or you get the error message above:

    2000.times do 20.times do |x| print x if x==3..x==5 end end

You may have to repeat the command several times to get the error!
This does not seem to happen when running this as a script with ruby - just with IRB!

Fresh install of ruby 1.9.3p194 (windows 7: OneClickInstaller / OSX: RVM)
No gems installed or loaded!

Full stack trace:
NotImplementedError: method `eql?' called on hidden T_STRING object (0x007f9fd18f2460 flags=0x2805 klass=0x0)
	from (irb):46:in `block (2 levels) in irb_binding'
	from (irb):46:in `times'
	from (irb):46:in `block in irb_binding'
	from (irb):46:in `times'
	from (irb):46
	from /Users/schwarze/.rvm/rubies/ruby-1.9.3-p194/bin/irb:16:in `<main>'


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