Error using pry inside RSpec's `expect{}.to change` blocks

[Hosam Aly]

Calling binding.pry from inside an expect {}.to change block causes the following error:

when_started hook failed: NoMethodError: undefined method `call' for Pry:Class
[...]/rspec-expectations-2.11.3/lib/rspec/matchers/built_in/change.rb:16:in `matches?'
(see _pry_.hooks.errors to debug)

A minimal RSpec example causing the error is:

require 'spec_helper'
require 'pry'

describe Pry do
  it 'should not throw an exception when called inside expect{} block' do
    x = []
    expect {
      binding.pry
    }.not_to change(x, :size)
  end
end

Using a rails application with the following gems added to the Gemfile:

gem 'rspec-rails'       , '2.11.0'
gem 'pry-rails'         , '0.2.1'
gem 'pry-debugger'      , '0.2.0'
gem 'pry-stack_explorer', '0.4.6'

Removing the pry-stack_explorer gem from the Gemfile fixes the error, so it is probably related to this gem.

[Jonathan Allard]

Looks like this has been fixed by fate, just tried the test case. Reopen if needed!