Broken dry-validation form array schema

array_spec_broken.rb

# you can simply put this code inside the dry-validation/spec/integration/form/predicates/array_spec.rb
    context 'nested' do
      subject(:schema) do
        Dry::Validation.Form do
          configure do
            config.type_specs = true
          end

          required(:foo).schema do
            required(:bar, :array).each(:int?)
          end
        end
      end

      context 'with missing input' do
        let(:input) { { 'foo' => {} } }

        it 'is not successful' do
          expect(result).to be_failing bar: ['is missing']
        end
      end

      context 'with nil input' do
        let(:input) { { 'foo' => { 'bar' => nil } } }

        it 'is not successful' do
          expect(result).to be_failing bar: ['must be an array']
        end
      end

      context 'with blank input' do
        let(:input) { { 'foo' => { 'bar' => '' } } }

        it 'is successful' do
          expect(result).to be_successful
        end
      end

      context 'with valid input' do
        let(:input) { { 'foo' => { 'bar' => ['3', '123', '1456546564465'] } } }

        it 'is successful' do
          expect(result).to be_successful
        end
      end

      context 'with invalid input' do
        let(:input) { { 'foo' => { 'bar' => ['bar'] } } }

        it 'is not successful' do
          expect(result).to be_failing bar: { 0 => ['must be an integer'] }
        end
      end

array_spec_working.rb

# you can simply put this code inside the dry-validation/spec/integration/form/predicates/array_spec.rb
    context 'nested' do
      subject(:schema) do
        IntArray = Dry::Types['form.array'].of(Dry::Types['coercible.int'])

        Dry::Validation.Form do
          configure do
            config.type_specs = true
          end

          required(:foo).schema do
            required(:bar, IntArray).each(:int?)
          end
        end
      end

      context 'with missing input' do
        let(:input) { { 'foo' => {} } }

        it 'is not successful' do
          expect(result).to be_failing bar: ['is missing']
        end
      end

      context 'with nil input' do
        let(:input) { { 'foo' => { 'bar' => nil } } }

        it 'is not successful' do
          expect(result).to be_failing bar: ['must be an array']
        end
      end

      context 'with blank input' do
        let(:input) { { 'foo' => { 'bar' => '' } } }

        it 'is successful' do
          expect(result).to be_successful
        end
      end

      context 'with valid input' do
        let(:input) { { 'foo' => { 'bar' => ['3', '123', '1456546564465'] } } }

        it 'is successful' do
          expect(result).to be_successful
        end
      end

      context 'with invalid input' do
        let(:input) { { 'foo' => { 'bar' => ['bar'] } } }

        it 'is not successful' do
          expect(result).to be_failing bar: { 0 => ['must be an integer'] }
        end
      end