Error in Layout/SpaceAroundMethodCallOperator cop when using Proc#call shorthand syntax

[nertzy]

Expected behavior

I want to use the Proc#call shorthand syntax that looks like proc.(*args) instead of proc.call(*args).

I'm using the example from the top of the Proc documentation.

Actual behavior

The 0.88 implementation of Layout/SpaceAroundMethodCallOperator raises an error when it encounters this syntax.

Steps to reproduce the problem

script.rb

# frozen_string_literal: true

square = proc { |x| x**2 }
puts square.(3)

rubocop.yml

Style/LambdaCall:
  EnforcedStyle: braces

Layout/SpaceAroundMethodCallOperator:
  Enabled: true

$ rubocop -d script.rb > output

output

For /Users/dev/projects/fake: configuration from /Users/dev/projects/fake/.rubocop.yml
Default configuration from /Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/config/default.yml
Inspecting 1 file
Scanning /Users/dev/projects/fake/script.rb
undefined method `begin_pos' for nil:NilClass
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/cop/layout/space_around_method_call_operator.rb:69:in `check_space_after_dot'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/cop/layout/space_around_method_call_operator.rb:49:in `on_send'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/cop/commissioner.rb:91:in `block (2 levels) in trigger_responding_cops'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/cop/commissioner.rb:113:in `with_cop_error_handling'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/cop/commissioner.rb:90:in `block in trigger_responding_cops'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/cop/commissioner.rb:89:in `each'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/cop/commissioner.rb:89:in `trigger_responding_cops'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/cop/commissioner.rb:61:in `block (2 levels) in <class:Commissioner>'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-ast-0.1.0/lib/rubocop/ast/traversal.rb:116:in `block in on_send'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-ast-0.1.0/lib/rubocop/ast/traversal.rb:113:in `each'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-ast-0.1.0/lib/rubocop/ast/traversal.rb:113:in `each_with_index'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-ast-0.1.0/lib/rubocop/ast/traversal.rb:113:in `on_send'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/cop/commissioner.rb:62:in `block (2 levels) in <class:Commissioner>'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-ast-0.1.0/lib/rubocop/ast/traversal.rb:59:in `block in on_begin'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-ast-0.1.0/lib/rubocop/ast/traversal.rb:59:in `each'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-ast-0.1.0/lib/rubocop/ast/traversal.rb:59:in `on_begin'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/cop/commissioner.rb:62:in `block (2 levels) in <class:Commissioner>'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-ast-0.1.0/lib/rubocop/ast/traversal.rb:14:in `walk'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/cop/commissioner.rb:74:in `investigate'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/cop/team.rb:151:in `investigate_partial'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/cop/team.rb:83:in `investigate'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/runner.rb:295:in `inspect_file'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/runner.rb:245:in `block in do_inspection_loop'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/runner.rb:277:in `block in iterate_until_no_changes'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/runner.rb:270:in `loop'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/runner.rb:270:in `iterate_until_no_changes'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/runner.rb:241:in `do_inspection_loop'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/runner.rb:121:in `block in file_offenses'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/runner.rb:146:in `file_offense_cache'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/runner.rb:120:in `file_offenses'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/runner.rb:111:in `process_file'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/runner.rb:90:in `block in each_inspected_file'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/runner.rb:89:in `each'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/runner.rb:89:in `reduce'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/runner.rb:89:in `each_inspected_file'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/runner.rb:78:in `inspect_files'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/runner.rb:39:in `run'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/cli/command/execute_runner.rb:21:in `execute_runner'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/cli/command/execute_runner.rb:13:in `run'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/cli/command.rb:10:in `run'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/cli/environment.rb:17:in `run'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/cli.rb:65:in `run_command'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/cli.rb:72:in `execute_runners'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/lib/rubocop/cli.rb:41:in `run'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/exe/rubocop:13:in `block in <top (required)>'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/2.7.0/benchmark.rb:308:in `realtime'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.88.0/exe/rubocop:12:in `<top (required)>'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/bin/rubocop:23:in `load'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/bin/rubocop:23:in `<top (required)>'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/cli/exec.rb:63:in `load'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/cli/exec.rb:63:in `kernel_load'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/cli/exec.rb:28:in `run'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/cli.rb:476:in `exec'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/vendor/thor/lib/thor.rb:399:in `dispatch'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/cli.rb:30:in `dispatch'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/vendor/thor/lib/thor/base.rb:476:in `start'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/cli.rb:24:in `start'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/exe/bundle:46:in `block in <top (required)>'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/lib/bundler/friendly_errors.rb:123:in `with_friendly_errors'
/Users/dev/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/bundler-2.1.4/exe/bundle:34:in `<top (required)>'
/Users/dev/.rbenv/versions/2.7.1/bin/bundle:23:in `load'
/Users/dev/.rbenv/versions/2.7.1/bin/bundle:23:in `<main>'
.

1 file inspected, no offenses detected
Finished in 0.11158400005660951 seconds

RuboCop version

$ [bundle exec] rubocop -V
0.88.0 (using Parser 2.7.1.4, rubocop-ast 0.1.0, running on ruby 2.7.1 x86_64-darwin19)

[marcandre]

cc/ @fatkodima