$ ruby -v
ruby 1.9.2p180 (2011-02-18 revision 30909) [x86_64-linux]
$ gcc -v
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4.4.4/configure --prefix=/apps/gcc/4.4.4 --with-local-prefix=/apps/gcc/4.4.4 --disable-multilib --enable-threads=posix --with-gmp=/apps/gmp/4.3.2 --with-gmp-include=/apps/gmp/4.3.2/include --with-gmp-include=/apps/gmp/4.3.2/lib --with-mpfr=/apps/mpfr/2.4.2 --with-mpfr-include=/apps/mpfr/2.4.2/include --with-mpfr-lib=/apps/mpfr/2.4.2/lib --enable-languages=c,c++,fortran,java,objc,obj-c++
Thread model: posix
gcc version 4.4.4 (GCC) 

$ ruby bug_report.rb  bug_report.rb  bug_report.rb 
bug_report.rb:6: [BUG] Segmentation fault
ruby 1.9.2p180 (2011-02-18 revision 30909) [x86_64-linux]

-- control frame ----------
c:0009 p:---- s:0027 b:0027 l:000050 d:000050 CFUNC  :next
c:0008 p:0011 s:0024 b:0024 l:0006c8 d:000023 BLOCK  bug_report.rb:6
c:0007 p:---- s:0019 b:0019 l:000018 d:000018 FINISH
c:0006 p:---- s:0017 b:0017 l:0021d0 d:0021d0 CFUNC  :each
c:0005 p:---- s:0015 b:0015 l:000014 d:000014 CFUNC  :each
c:0004 p:---- s:0013 b:0013 l:002100 d:002100 CFUNC  :count
c:0003 p:0104 s:0010 b:0009 l:0006c8 d:001920 EVAL   bug_report.rb:18
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
c:0001 p:0000 s:0002 b:0002 l:0006c8 d:0006c8 TOP   
---------------------------
-- Ruby level backtrace information ----------------------------------------
bug_report.rb:18:in `<main>'
bug_report.rb:18:in `count'
bug_report.rb:18:in `each'
bug_report.rb:18:in `each'
bug_report.rb:6:in `block in <main>'
bug_report.rb:6:in `next'

-- C level backtrace information -------------------------------------------
/home/585/rxs585/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_vm_bugreport+0x66) [0x7ffff7a8fde6]
/home/585/rxs585/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9(rb_bug+0x189) [0x7ffff79087f9]
/home/585/rxs585/.rvm/rubies/ruby-1.9.2-p180/lib/libruby.so.1.9 [0x7ffff79f55fe]
/lib64/libpthread.so.0 [0x7ffff7651b10]
[0x7ffff7ffa850]

[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

Aborted