New Layout/AlignHash has a runtime error on mixed Hash style

[kmoschcau]

Expected behavior

Rubocop should run the Layout/AlignHash cop without an error occuring.

Actual behavior

There occurs an error with the message "nil can't be coerced into Integer"

Steps to reproduce the problem

Minimal example:

bar(
  foo:  'baz',
  'bar' => 'bla'
)

RuboCop version

$ [bundle exec] rubocop -V
0.70.0 (using Parser 2.6.3.0, running on ruby 2.6.3 x86_64-linux)

[rmm5t]

I just ran into this as well, here was our specific use-case:

      {
        'Content-Type' => 'application/json',
        Authorization: "Bearer #{@access_token}",
      }

$ rubocop -V
0.70.0 (using Parser 2.6.3.0, running on ruby 2.5.3 x86_64-darwin18)

# Allow for either `key` or `table` alignment for hashes
Layout/AlignHash:
  EnforcedHashRocketStyle:
    - key
    - table
  EnforcedColonStyle:
    - key
    - table
  EnforcedLastArgumentHashStyle: ignore_implicit

An error occurred while Layout/AlignHash cop was inspecting /Users/rmcgeary/work/ironridge/lib/salesforce/client.rb:72:6.
nil can't be coerced into Integer
.../gems/rubocop-0.70.0/lib/rubocop/cop/mixin/hash_alignment.rb:113:in `+'
.../gems/rubocop-0.70.0/lib/rubocop/cop/mixin/hash_alignment.rb:113:in `value_delta'
.../gems/rubocop-0.70.0/lib/rubocop/cop/mixin/hash_alignment.rb:65:in `deltas'
.../gems/rubocop-0.70.0/lib/rubocop/cop/layout/align_hash.rb:239:in `block (2 levels) in check_pairs'
.../gems/rubocop-0.70.0/lib/rubocop/cop/layout/align_hash.rb:238:in `each'
.../gems/rubocop-0.70.0/lib/rubocop/cop/layout/align_hash.rb:238:in `block in check_pairs'
.../gems/rubocop-0.70.0/lib/rubocop/cop/layout/align_hash.rb:237:in `each'
.../gems/rubocop-0.70.0/lib/rubocop/cop/layout/align_hash.rb:237:in `check_pairs'
.../gems/rubocop-0.70.0/lib/rubocop/cop/layout/align_hash.rb:208:in `on_hash'

[rmm5t]

PR ready for review here: #7068