Issue #5776 has been updated by davidbalbert (David Albert).

File 0001-make-top-level-methods-defined-in-IRB-private.patch added

I ran into this bug recently and I did a bit of investigating. This is due to a change introduced by #3406 (r29578) that made inner method definitions public regardless of the visibility of the method they were defined in.

I've attached a patch that calls `private` in the `irb_binding` method before returning the binding, which fixes the problem. I also verified that context mode 3 was the only mode affected by r29578 and that IRB works correctly when started via the command line and via `IRB.start`.
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Bug #5776: irb ?????????????????у??臂???????<?純???????? public ?????
https://bugs.ruby-lang.org/issues/5776#change-27503

Author: hibariya (hi hibariya)
Status: Assigned
Priority: Normal
Assignee: keiju (Keiju Ishitsuka)
Category: lib
Target version: 2.0.0
ruby -v: ruby 2.0.0dev (2011-12-15 trunk 34056) [x86_64-darwin11.2.0] 


irb ?????????????????у??臂???????<?純????????若?喝?冴????狗????? private ??с???? public ????c?????障????障?????

-------------------------------------------------
 irb(main):001:0> def greeting
 irb(main):002:1>   'hi'
 irb(main):003:1> end
 => nil
 irb(main):004:0> val = Object.new
 => #<Object:0x007fe6ca05fd80>
 irb(main):005:0> val.greeting
 => "hi"
 irb(main):006:0> val.private_methods.grep /greeting/
 => []
 irb(main):007:0> val.public_methods.grep /greeting/
 => [:greeting]
-------------------------------------------------

public ????????? irb ??у??茵??????????????帥?с??鐚??????<?ゃ????絖??????? ruby ??潟????潟????у??茵?????????翫????? private ??<?純?????????????臂???????障??鐚????


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