rspec/rspec-mocks — pull request #189 by 4r2r (2012-10-03 15:05:10+00:00)
Title: ArgumentError when calling dup with parameters

Given the code
```ruby
class MyClass
def dup(options)
# Dup'ing
end
end
```
When I write
```ruby
MyClass.any_instance
MyClass.new.dup(some: [:options])
```
Then I get `ArgumentError`