redcarpet-crasher.rb

require 'redcarpet'

# Custom handler that raises error.
# 
module Redcarpet
  module Render
    class Crasher < HTML
      def paragraph(text)
        raise "Error!"
      end
    end
  end
end

redcarpet = Redcarpet::Markdown.new Redcarpet::Render::Crasher

# Will loop a certain number of times (always 17 for me for some reason)
# and then CRASH with:
# 
#   Assertion failed: (md->work_bufs[BUFFER_BLOCK].size == 0), function sd_markdown_render, file markdown.c, line 2544.
#   Abort trap: 6
# 
20.times do
  begin
    redcarpet.render "Body text."
  rescue RuntimeError => e
    puts "Error: #{e.message}"
  end
end