[ruby-core:45915] [ruby-trunk - Bug #6655][Open] Calling instance_methods after prepend causes VM crash

Issue #6655 has been reported by rkh (Konstantin Haase).

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Bug #6655: Calling instance_methods after prepend causes VM crash
https://bugs.ruby-lang.org/issues/6655

Author: rkh (Konstantin Haase)
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 2.0.0
ruby -v: 2.0.0


=begin

This code:

    class Example
      prepend Module.new
      instance_methods
    end

Causes the following crash on trunk:

    example.rb:3: [BUG] Segmentation fault
    ruby 2.0.0dev (2012-06-27 trunk 36234) [x86_64-darwin11.3.0]

    -- Control frame information -----------------------------------------------
    c:0004 p:---- s:0009 b:0009 e:000008 CFUNC  :instance_methods
    c:0003 p:0034 s:0006 b:0006 e:000005 CLASS  example.rb:3
    c:0002 p:0009 s:0004 b:0004 e:001b68 EVAL   example.rb:1 [FINISH]
    c:0001 p:0000 s:0002 b:0002 e:001dc8 TOP    [FINISH]

    example.rb:1:in `<main>'
    example.rb:3:in `<class:Example>'
    example.rb:3:in `instance_methods'

    -- C level backtrace information -------------------------------------------

       See Crash Report log file under ~/Library/Logs/CrashReporter or
       /Library/Logs/CrashReporter, for the more detail of.

    -- Other runtime information -----------------------------------------------

    * Loaded script: example.rb

    * Loaded features:

        0 enumerator.so
        1 /Users/konstantin/.rbenv/versions/2.0.0-dev/lib/ruby/2.0.0/x86_64-darwin11.3.0/enc/encdb.bundle
        2 /Users/konstantin/.rbenv/versions/2.0.0-dev/lib/ruby/2.0.0/x86_64-darwin11.3.0/enc/trans/transdb.bundle
        3 /Users/konstantin/.rbenv/versions/2.0.0-dev/lib/ruby/2.0.0/rubygems/defaults.rb
        4 /Users/konstantin/.rbenv/versions/2.0.0-dev/lib/ruby/2.0.0/x86_64-darwin11.3.0/rbconfig.rb
        5 /Users/konstantin/.rbenv/versions/2.0.0-dev/lib/ruby/2.0.0/rubygems/deprecate.rb
        6 /Users/konstantin/.rbenv/versions/2.0.0-dev/lib/ruby/2.0.0/rubygems/exceptions.rb
        7 /Users/konstantin/.rbenv/versions/2.0.0-dev/lib/ruby/2.0.0/rubygems/custom_require.rb
        8 /Users/konstantin/.rbenv/versions/2.0.0-dev/lib/ruby/2.0.0/rubygems.rb

    [NOTE]
    You may have encountered a bug in the Ruby interpreter or extension libraries.
    Bug reports are welcome.
    For details: http://www.ruby-lang.org/bugreport.html

    [1]    5026 abort      ruby example.rb

=end


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