Endless ranges crash mutant

[dgollahon]

Simple reproduction case I tried:

class Test
  def self.slice_after(array, index)
    array[index..]
  end
end

Reproduction spec:

RSpec.describe Test do
  it 'works' do
    expect(described_class.slice_after([1,2], 1)).to eql([2])
  end
end

Executing mutant --use rspec Test produces a long trace ending in

1: from /Users/gollahon/.rvm/gems/ruby-2.6.6/gems/mutant-0.9.9/lib/mutant/mutator/node.rb:42:in mutate_child' /Users/gollahon/.rvm/gems/ruby-2.6.6/gems/mutant-0.9.9/lib/mutant/mutator.rb:18:in mutate': undefined method `type' for nil:NilClass (NoMethodError)

Versions
mutant-rspec version: 0.9.9
unparser version: 0.4.7

[mbj]

@dgollahon thanks for the report. This indicates I need to find more code bases to hook up to mutants self test in generation only mode to assert syntax coverage.

I think I should also hook up all code snippets from parser to mutants generator test suite.

[dgollahon]

I think I should also hook up all code snippets from parser to mutants generator test suite.

Yeah, I think that would be a great idea.

[mbj]

@chaubunhtha you are good? Seems you post random one word comments to this repository for no reason.

Unless you start to explain yourself, I've to block you assuming you are just here to spam.

[mbj]

@dgollahon fix for this issue was released in 0.9.10.

[dgollahon]

@mbj, thanks!