Is there any way to start the Ruby debugger on exception?

Question

Is there any way to start the/a Ruby debugger whenever the code throws an exception, without me wrapping the code like this:

begin
  #do something
rescue
  d         


        

Answer 1

In RubyMine 2.0.x go to Run -> View Breakpoints and click "Ruby Exception Breakpoints" tab, then add the type of the exception you are interested in...

There should be something similar in NetBeans and other Ruby IDEs i guess.

BTW, RubyMine is the BEST!

Answer 2

I stumbled across this page:post-mortem debugging. Doing this:

Debugger.start(:post_mortem => true)

gets me where I want to.

Answer 3

require 'ruby-debug'
class Exception
  alias original_initalize initialize
  def initialize(*args)
    original_initalize(*args)
    debugger
  end
end

This will run the original exception as well as call debugger

Answer 4

if you're using ruby-debug (and it looks like you are), you can set catchPoints for the exception you want.

 (rdbg) catch Exception

for example

Answer 5

Hammertime!