MRI segfault!

module A
  def initialize; super end
  
  def self.extended(obj)
    instance_method(:initialize).bind(obj).call
  end
end

Object.new.extend A


/home/joemac/segfault.rb:13: [BUG] Segmentation fault at 0x00000000000018
ruby 2.1.0p0 (2013-12-25 revision 44422) [x86_64-linux]

-- Control frame information -----------------------------------------------
c:0006 p:0008 s:0019 e:000017 METHOD /home/joemac/segfault.rb:13 [FINISH]
c:0005 p:---- s:0015 e:000014 CFUNC  :call
c:0004 p:0015 s:0012 e:000011 METHOD /home/joemac/segfault.rb:13 [FINISH]
c:0003 p:---- s:0008 e:000007 CFUNC  :extend
c:0002 p:0030 s:0004 E:0015f8 EVAL   /home/joemac/segfault.rb:15 [FINISH]
c:0001 p:0000 s:0002 E:001d68 TOP    [FINISH]

-- Ruby level backtrace information ----------------------------------------
/home/joemac/segfault.rb:15:in `<main>'
/home/joemac/segfault.rb:15:in `extend'
/home/joemac/segfault.rb:13:in `extended'
/home/joemac/segfault.rb:13:in `call'
/home/joemac/segfault.rb:13:in `initialize'

-- C level backtrace information -------------------------------------------
ruby(+0x186fec) [0x7f5bae55ffec]
ruby(+0x1f90f3) [0x7f5bae5d20f3]
ruby(rb_bug+0xb3) [0x7f5bae5d32d3]
ruby(+0xfc27e) [0x7f5bae4d527e]
/lib64/libpthread.so.0(+0x383380ef90) [0x7f5badfa8f90]
ruby(+0x1710a3) [0x7f5bae54a0a3]
ruby(+0x175546) [0x7f5bae54e546]
ruby(+0x178dac) [0x7f5bae551dac]
ruby(+0x179c44) [0x7f5bae552c44]
ruby(+0x17af67) [0x7f5bae553f67]
ruby(rb_method_call_with_block+0x10a) [0x7f5bae404cfa]
ruby(+0x170a24) [0x7f5bae549a24]
ruby(+0x17e08e) [0x7f5bae55708e]
ruby(+0x175415) [0x7f5bae54e415]
ruby(+0x178dac) [0x7f5bae551dac]
ruby(+0x179c44) [0x7f5bae552c44]
ruby(+0x17b10b) [0x7f5bae55410b]
ruby(rb_funcall+0xca) [0x7f5bae55479a]
ruby(+0x22f3c) [0x7f5bae3fbf3c]
ruby(+0x170a24) [0x7f5bae549a24]
ruby(+0x17e08e) [0x7f5bae55708e]
ruby(+0x175415) [0x7f5bae54e415]
ruby(+0x178dac) [0x7f5bae551dac]
ruby(rb_iseq_eval_main+0x1f6) [0x7f5bae55dd86]
ruby(+0x22bfa) [0x7f5bae3fbbfa]
ruby(ruby_run_node+0x2d) [0x7f5bae3ff0fd]
ruby(+0x2280b) [0x7f5bae3fb80b]
/lib64/libc.so.6(__libc_start_main+0xf5) [0x7f5bad4bdb45]
ruby(+0x22839) [0x7f5bae3fb839]

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

* Loaded script: /home/joemac/segfault.rb

* Loaded features:

    0 enumerator.so
    1 /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/x86_64-linux/enc/encdb.so
    2 /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/x86_64-linux/enc/trans/transdb.so
    3 /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/x86_64-linux/rbconfig.rb
    4 /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/rubygems/compatibility.rb
    5 /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/rubygems/defaults.rb
    6 /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/rubygems/deprecate.rb
    7 /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/rubygems/errors.rb
    8 /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/rubygems/version.rb
    9 /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/rubygems/requirement.rb
   10 /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/rubygems/platform.rb
   11 /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/rubygems/basic_specification.rb
   12 /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/rubygems/stub_specification.rb
   13 /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/rubygems/util/stringio.rb
   14 /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/rubygems/specification.rb
   15 /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/rubygems/exceptions.rb
   16 /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/rubygems/core_ext/kernel_gem.rb
   17 thread.rb
   18 /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/x86_64-linux/thread.so
   19 /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/monitor.rb
   20 /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb
   21 /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/rubygems.rb

* Process memory map:

7f5ba64da000-7f5ba64ef000 r-xp 00000000 fd:01 2100881                    /usr/lib64/libgcc_s-4.8.2-20131212.so.1
7f5ba64ef000-7f5ba66ee000 ---p 00015000 fd:01 2100881                    /usr/lib64/libgcc_s-4.8.2-20131212.so.1
7f5ba66ee000-7f5ba66ef000 r--p 00014000 fd:01 2100881                    /usr/lib64/libgcc_s-4.8.2-20131212.so.1
7f5ba66ef000-7f5ba66f0000 rw-p 00015000 fd:01 2100881                    /usr/lib64/libgcc_s-4.8.2-20131212.so.1
7f5ba66f0000-7f5ba66f3000 r-xp 00000000 fd:02 29889009                   /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/x86_64-linux/thread.so
7f5ba66f3000-7f5ba68f2000 ---p 00003000 fd:02 29889009                   /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/x86_64-linux/thread.so
7f5ba68f2000-7f5ba68f3000 r--p 00002000 fd:02 29889009                   /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/x86_64-linux/thread.so
7f5ba68f3000-7f5ba68f4000 rw-p 00003000 fd:02 29889009                   /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/x86_64-linux/thread.so
7f5ba68f4000-7f5ba68f6000 r-xp 00000000 fd:02 29889107                   /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/x86_64-linux/enc/trans/transdb.so
7f5ba68f6000-7f5ba6af6000 ---p 00002000 fd:02 29889107                   /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/x86_64-linux/enc/trans/transdb.so
7f5ba6af6000-7f5ba6af7000 r--p 00002000 fd:02 29889107                   /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/x86_64-linux/enc/trans/transdb.so
7f5ba6af7000-7f5ba6af8000 rw-p 00003000 fd:02 29889107                   /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/x86_64-linux/enc/trans/transdb.so
7f5ba6af8000-7f5ba6afa000 r-xp 00000000 fd:02 29889087                   /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/x86_64-linux/enc/encdb.so
7f5ba6afa000-7f5ba6cf9000 ---p 00002000 fd:02 29889087                   /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/x86_64-linux/enc/encdb.so
7f5ba6cf9000-7f5ba6cfa000 r--p 00001000 fd:02 29889087                   /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/x86_64-linux/enc/encdb.so
7f5ba6cfa000-7f5ba6cfb000 rw-p 00002000 fd:02 29889087                   /home/joemac/.rbenv/versions/2.1.0/lib/ruby/2.1.0/x86_64-linux/enc/encdb.so
7f5ba6cfb000-7f5bad220000 r--p 00000000 fd:01 2115275                    /usr/lib/locale/locale-archive
7f5bad220000-7f5bad296000 r-xp 00000000 fd:01 2097454                    /usr/lib64/libfreebl3.so
7f5bad296000-7f5bad496000 ---p 00076000 fd:01 2097454                    /usr/lib64/libfreebl3.so
7f5bad496000-7f5bad497000 r--p 00076000 fd:01 2097454                    /usr/lib64/libfreebl3.so
7f5bad497000-7f5bad498000 rw-p 00077000 fd:01 2097454                    /usr/lib64/libfreebl3.so
7f5bad498000-7f5bad49c000 rw-p 00000000 00:00 0 
7f5bad49c000-7f5bad652000 r-xp 00000000 fd:01 2097464                    /usr/lib64/libc-2.17.so
7f5bad652000-7f5bad852000 ---p 001b6000 fd:01 2097464                    /usr/lib64/libc-2.17.so
7f5bad852000-7f5bad856000 r--p 001b6000 fd:01 2097464                    /usr/lib64/libc-2.17.so
7f5bad856000-7f5bad858000 rw-p 001ba000 fd:01 2097464                    /usr/lib64/libc-2.17.so
7f5bad858000-7f5bad85d000 rw-p 00000000 00:00 0 
7f5bad85d000-7f5bad95e000 r-xp 00000000 fd:01 2098056                    /usr/lib64/libm-2.17.so
7f5bad95e000-7f5badb5d000 ---p 00101000 fd:01 2098056                    /usr/lib64/libm-2.17.so
7f5badb5d000-7f5badb5e000 r--p 00100000 fd:01 2098056                    /usr/lib64/libm-2.17.so
7f5badb5e000-7f5badb5f000 rw-p 00101000 fd:01 2098056                    /usr/lib64/libm-2.17.so
7f5badb5f000-7f5badb67000 r-xp 00000000 fd:01 2097727                    /usr/lib64/libcrypt-2.17.so
7f5badb67000-7f5badd66000 ---p 00008000 fd:01 2097727                    /usr/lib64/libcrypt-2.17.so
7f5badd66000-7f5badd67000 r--p 00007000 fd:01 2097727                    /usr/lib64/libcrypt-2.17.so
7f5badd67000-7f5badd68000 rw-p 00008000 fd:01 2097727                    /usr/lib64/libcrypt-2.17.so
7f5badd68000-7f5badd96000 rw-p 00000000 00:00 0 
7f5badd96000-7f5badd99000 r-xp 00000000 fd:01 2097972                    /usr/lib64/libdl-2.17.so
7f5badd99000-7f5badf98000 ---p 00003000 fd:01 2097972                    /usr/lib64/libdl-2.17.so
7f5badf98000-7f5badf99000 r--p 00002000 fd:01 2097972                    /usr/lib64/libdl-2.17.so
7f5badf99000-7f5badf9a000 rw-p 00003000 fd:01 2097972                    /usr/lib64/libdl-2.17.so
7f5badf9a000-7f5badfb0000 r-xp 00000000 fd:01 2097675                    /usr/lib64/libpthread-2.17.so
7f5badfb0000-7f5bae1b0000 ---p 00016000 fd:01 2097675                    /usr/lib64/libpthread-2.17.so
7f5bae1b0000-7f5bae1b1000 r--p 00016000 fd:01 2097675                    /usr/lib64/libpthread-2.17.so
7f5bae1b1000-7f5bae1b2000 rw-p 00017000 fd:01 2097675                    /usr/lib64/libpthread-2.17.so
7f5bae1b2000-7f5bae1b6000 rw-p 00000000 00:00 0 
7f5bae1b6000-7f5bae1d7000 r-xp 00000000 fd:01 2097388                    /usr/lib64/ld-2.17.so
7f5bae2b2000-7f5bae3b8000 rw-p 00000000 00:00 0 
7f5bae3d0000-7f5bae3d1000 rw-p 00000000 00:00 0 
7f5bae3d1000-7f5bae3d2000 ---p 00000000 00:00 0 
7f5bae3d2000-7f5bae3d6000 rw-p 00000000 00:00 0                          [stack:1292]
7f5bae3d6000-7f5bae3d7000 r--p 00020000 fd:01 2097388                    /usr/lib64/ld-2.17.so
7f5bae3d7000-7f5bae3d8000 rw-p 00021000 fd:01 2097388                    /usr/lib64/ld-2.17.so
7f5bae3d8000-7f5bae3d9000 rw-p 00000000 00:00 0 
7f5bae3d9000-7f5bae69c000 r-xp 00000000 fd:02 29884433                   /home/joemac/.rbenv/versions/2.1.0/bin/ruby
7f5bae89c000-7f5bae8a1000 r--p 002c3000 fd:02 29884433                   /home/joemac/.rbenv/versions/2.1.0/bin/ruby
7f5bae8a1000-7f5bae8a3000 rw-p 002c8000 fd:02 29884433                   /home/joemac/.rbenv/versions/2.1.0/bin/ruby
7f5bae8a3000-7f5bae8c9000 rw-p 00000000 00:00 0 
7f5bafa62000-7f5bafef9000 rw-p 00000000 00:00 0                          [heap]
7fff20464000-7fff20486000 rw-p 00000000 00:00 0 
7fff204e1000-7fff204e3000 r-xp 00000000 00:00 0                          [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]