ruby_backtracer: a library to output higher quality backtraces if an unhandled exception is raised

ex:
running given script examples/crash.rb used to output:
examples>ruby crash.rb
crash.rb:2:in `go2': unhandled exception
        from crash.rb:6:in `go'
        from crash.rb:9

now outputs:
examples>ruby -r../backtrace_with_code_and_locals crash.rb

unhandled exception: crash.rb:2:   raise
        locals: {"a"=>"3", "b"=>55}
          from:
        crash.rb:1 go2(a=>3, b=>55)
                locals: {"a"=>"3", "b"=>55}
        crash.rb:5 go(a=>3)
                locals: {"a"=>"3"}

Now wasn't that prettier?

There are several other tracing options provided, if you don't want as much output, or want more speed.  Specify which by script name.

ex: backtrace_nothing_swallowed.rb outputs the same as the default exception output, except it doesn't have the 
...skip 24 lines... 
line in the middle (also no speed slowdown, and no local variables displayed).

Try them out by running test_all.rb in the examples folder, or eyeball the example output files in examples/example_output*

http://github.com/rogerdpack/ruby_backtracer/tree/master

Note: some options depends on ruby-debug [MRI] gem, some don't.

To install clone from github, above, then ruby -rscriptname your_script.

related projects: unroller, http://eigenclass.org/hiki/method+arguments+via+introspection, liveconsole, ruby-debug

send comments to rogerdpack on github.