all hell

 mv mytest.dylib mytest.bundle
 kings  ⋯  projects  druby  playing  irb -r ./mytest.bundle 
/Users/kings/development/projects/druby/playing/mytest.bundle: [BUG] Segmentation fault at 0x00000000000418
ruby 2.2.1p85 (2015-02-26 revision 49769) [x86_64-darwin14]

-- Crash Report log information --------------------------------------------
   See Crash Report log file under the one of following:
     * ~/Library/Logs/CrashReporter
     * /Library/Logs/CrashReporter
     * ~/Library/Logs/DiagnosticReports
     * /Library/Logs/DiagnosticReports
   for more details.

-- Control frame information -----------------------------------------------
c:0010 p:-17557903155116 s:0040 e:000039 TOP    [FINISH]
c:0009 p:---- s:0038 e:000037 CFUNC  :require
c:0008 p:0113 s:0034 e:000033 METHOD /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54
c:0007 p:0015 s:0024 e:000023 BLOCK  /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/init.rb:280 [FINISH]
c:0006 p:---- s:0021 e:000020 CFUNC  :each
c:0005 p:0013 s:0018 e:000017 METHOD /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/init.rb:278
c:0004 p:0063 s:0013 e:000012 METHOD /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/init.rb:20
c:0003 p:0039 s:0009 e:000008 METHOD /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb.rb:378
c:0002 p:0021 s:0004 E:001220 EVAL   /Users/kings/.rvm/rubies/ruby-2.2.1/bin/irb:11 [FINISH]
c:0001 p:0000 s:0002 E:0025f0 TOP    [FINISH]

-- Ruby level backtrace information ----------------------------------------
/Users/kings/.rvm/rubies/ruby-2.2.1/bin/irb:11:in `<main>'
/Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb.rb:378:in `start'
/Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/init.rb:20:in `setup'
/Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/init.rb:278:in `load_modules'
/Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/init.rb:278:in `each'
/Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/init.rb:280:in `block in load_modules'
/Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
/Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'

-- Machine register context ------------------------------------------------
 rax: 0x0000000000000030 rbx: 0x00000001085f3f60 rcx: 0x0000000000000000
 rdx: 0xfffffffffffffff0 rdi: 0x0000000000000030 rsi: 0x0000000000000000
 rbp: 0x00007fff58306990 rsp: 0x00007fff58306990  r8: 0x000000000000000b
  r9: 0x00000000c0000000 r10: 0x00007fff9c72bd00 r11: 0x00007fff8ef6ae80
 r12: 0x00007fff7a40a070 r13: 0x00007fc022406c00 r14: 0x0000000000000006
 r15: 0x00007fff58306a40 rip: 0x000000010866db1f rfl: 0x0000000000010246

-- C level backtrace information -------------------------------------------
0   ruby                                0x0000000107b9f3db rb_vm_bugreport + 155
1   ruby                                0x0000000107a438d0 rb_bug_context + 480
2   ruby                                0x0000000107b1bd43 sigsegv + 83
3   libsystem_platform.dylib            0x00007fff8ef6c52a _sigtramp + 26
4   libruby.2.0.0.dylib                 0x000000010866db1f ruby_xmalloc + 17
5   ???                                 0x00007fff583069b0 0x0 + 140734672955824

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

* Loaded script: irb

* Loaded features:

    0 enumerator.so
    1 rational.so
    2 complex.so
    3 encdb.so
    4 trans/transdb.so
    5 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/unicode_normalize.rb
    6 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/x86_64-darwin14/rbconfig.rb
    7 thread.rb
    8 thread.so
    9 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/compatibility.rb
   10 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/defaults.rb
   11 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/deprecate.rb
   12 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/errors.rb
   13 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/version.rb
   14 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/requirement.rb
   15 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/platform.rb
   16 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/basic_specification.rb
   17 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/stub_specification.rb
   18 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/util/stringio.rb
   19 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/specification.rb
   20 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/exceptions.rb
   21 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_gem.rb
   22 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/monitor.rb
   23 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb
   24 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems.rb
   25 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/e2mmap.rb
   26 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/init.rb
   27 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/workspace.rb
   28 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/inspector.rb
   29 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/context.rb
   30 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/extend-command.rb
   31 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/output-method.rb
   32 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/notifier.rb
   33 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/slex.rb
   34 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/ruby-token.rb
   35 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/ruby-lex.rb
   36 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/src_encoding.rb
   37 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/magic-file.rb
   38 readline.so
   39 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/input-method.rb
   40 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/locale.rb
   41 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb.rb
   42 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/path_support.rb
   43 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/dependency.rb
   44 /Users/kings/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/irb/completion.rb
   45 /Users/kings/.rvm/scripts/irbrc.rb

[NOTE]
You may have encountered a bug in the Ruby interpreter or extension libraries.
Bug reports are welcome.
Don't forget to include the above Crash Report log file.
For details: http://www.ruby-lang.org/bugreport.html

Abort trap: 6