ensure doesn't return value implicitly

In Ruby, ensure clause ensures that the code block is executed when an exception is raised or not.

def foo
  'foo'
ensure
  puts 'ensure'
end

foo # => 'ensure' is output

However, the value in ensure clause is not returned implicitly.

def foo
  'foo'
ensure
  'ensure'
end

foo # => 'foo', not 'ensure'

You need to return value explicitly with return.

def foo
  'foo'
ensure
  return 'ensure'
end

foo # => 'ensure'