/Users/peter/Desktop/at_exit.rb:16: [BUG] Segmentation fault
ruby 1.9.3p392 (2013-02-22 revision 39386) [x86_64-darwin12.2.1]

-- Control frame information -----------------------------------------------
c:0003 p:0019 s:0006 b:0006 l:001ab8 d:000005 BLOCK  /Users/peter/Desktop/at_exit.rb:16
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
c:0001 p:0000 s:0002 b:0002 l:000c18 d:000c18 TOP   

-- Ruby level backtrace information ----------------------------------------
/Users/peter/Desktop/at_exit.rb:16:in `block in <top (required)>'

-- 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: -e

* Loaded features:

    0 enumerator.so
    1 /opt/ruby-1.9/lib/ruby/1.9.1/x86_64-darwin12.2.1/enc/encdb.bundle
    2 /opt/ruby-1.9/lib/ruby/1.9.1/x86_64-darwin12.2.1/enc/trans/transdb.bundle
    3 /opt/ruby-1.9/lib/ruby/1.9.1/rubygems/defaults.rb
    4 /opt/ruby-1.9/lib/ruby/1.9.1/x86_64-darwin12.2.1/rbconfig.rb
    5 /opt/ruby-1.9/lib/ruby/1.9.1/rubygems/deprecate.rb
    6 /opt/ruby-1.9/lib/ruby/1.9.1/rubygems/exceptions.rb
    7 /opt/ruby-1.9/lib/ruby/1.9.1/rubygems/custom_require.rb
    8 /opt/ruby-1.9/lib/ruby/1.9.1/rubygems.rb
    9 /Users/peter/Desktop/at_exit.rb
   10 /Users/peter/Desktop/big_file.rb