a.rb

require 'bundler/setup'
require 'retry-handler'

begin
  Proc.new { |cnt|
    warn "failed ##{cnt}"
    raise StandardError
  }.retry(accept_exception: StandardError)
rescue => e
  p e
end

class Foo
  def retry_foo()
    warn "failed"
    raise StandardError
  end

  def retry_bar(cnt)
    warn "failed ##{cnt}"
    raise StandardError
  end
end

begin
  Foo.new.method(:retry_foo).retry(accept_exception: StandardError)
rescue => e
  p e
end

begin
  Foo.new.method(:retry_bar).retry(accept_exception: StandardError)
rescue => e
  p e
end

begin
  retry_handler(accept_exception: StandardError) do |cnt|
    warn "failed ##{cnt}"
    raise StandardError
  end
rescue => e
  p e
end