title: Rspec error cannot find matching line from backtrace
body: <p>I have written a group of 23 tests for my user model and all of them are failing with the following error:</p>
  
  <pre><code>Failure/Error: Unable to find matching line from backtrace 
  ArgumentError: 
    block not supplied
  </code></pre>
  
  <p>I have tried messing with different versions of capybara, rspec-rails, and growl, but to be perfectly honest, I really don't know what I'm doing here, and don't really understand the error.  I would really appreciate help from anyone who could point me in the right direction.</p>
  
  <p>Here is a sample from my <code>user_spec.rb</code> file</p>
  
  <pre><code>require 'spec_helper'
  
  describe User do
    before @user = User.new(name: 'example', password: 'foobar', password_confirmation: 'foobar',
                          email: 'example@example.com', description: 'Lorem ipsum dolor...')
  
    subject { @user }
  
    it { should respond_to(:name) }
    it { should respond_to(:email) }
    it { should respond_to(:password) }
    it { should respond_to(:password_confirmation) }
    it { should respond_to(:password_digest) }
    it { should respond_to(:description) }
    it { should respond_to(:admin) }
    it { should respond_to(:remember_token) }
  
    describe "when name is not present" do
      before { @user.name = " " }
      it { should_not be_valid }
    end
    .
    .
    .
  end
  </code></pre>
  
  <p>Here are the relevant parts of my <code>Gemfile</code>:</p>
  
  <pre><code>group :development do
    gem 'rspec-rails', '2.11.0'
    gem 'guard'
    gem 'guard-spork', :github =&gt; 'guard/guard-spork'
    gem 'guard-rspec'
    gem 'spork'
    gem 'sqlite3'
  end
  
  group :test do
    gem 'capybara', '1.1.2'
    gem 'rb-fsevent', '0.9.1', :require =&gt; false
    gem 'growl', '1.0.3'
    gem 'factory_girl_rails', '4.1.0'
  end
  </code></pre>
  
  <p>Thanks for reading!</p>