ruby 2.0 OO backtrace

gistfile1.txt

[8] pry(main)> caller_locations
=> [#<RubyVM::Backtrace::Location:0x007f782e9d24e0>,
 #<RubyVM::Backtrace::Location:0x007f782e9d24b8>,
 #<RubyVM::Backtrace::Location:0x007f782e9d2468>,
 #<RubyVM::Backtrace::Location:0x007f782e9d2418>,
 #<RubyVM::Backtrace::Location:0x007f782e9d23a0>,
 #<RubyVM::Backtrace::Location:0x007f782e9d2350>,
 #<RubyVM::Backtrace::Location:0x007f782e9d2328>,
 #<RubyVM::Backtrace::Location:0x007f782e9d2300>,
 #<RubyVM::Backtrace::Location:0x007f782e9d22d8>,
 #<RubyVM::Backtrace::Location:0x007f782e9d22b0>,
 #<RubyVM::Backtrace::Location:0x007f782e9d2260>,
 #<RubyVM::Backtrace::Location:0x007f782e9d2210>,
 #<RubyVM::Backtrace::Location:0x007f782e9d21c0>,
 #<RubyVM::Backtrace::Location:0x007f782e9d2198>,
 #<RubyVM::Backtrace::Location:0x007f782e9d2170>,
 #<RubyVM::Backtrace::Location:0x007f782e9d2148>,
 #<RubyVM::Backtrace::Location:0x007f782e9d2120>,
 #<RubyVM::Backtrace::Location:0x007f782e9d20f8>,
 #<RubyVM::Backtrace::Location:0x007f782e9d20d0>]
[9] pry(main)> b = _[5]
=> #<RubyVM::Backtrace::Location:0x007f782e9d2350>
[10] pry(main)> ls -m b
RubyVM::Backtrace::Location#methods: absolute_path  base_label  label  lineno  path  to_s
[11] pry(main)> b.label
=> "block (2 levels) in repl"
[12] pry(main)> b.base_label
=> "repl"
[13] pry(main)> b.lineno
=> 232
[14] pry(main)> b.path
=> "/home/john/.rbenv/versions/debug_api2/lib/ruby/gems/2.0.0/gems/pry-0.9.10/lib/pry/pry_instance.rb"
[15] pry(main)>