From d8bdede1eff121594466c568bc32373b7839d35c Mon Sep 17 00:00:00 2001
From: Koichi ITO <koic.ito@gmail.com>
Date: Sun, 8 Mar 2020 00:53:36 +0900
Subject: [PATCH] [Fix #7779] Fix a false positive for
 `Style/MultilineMethodCallIndentation`

Fixes #7779.

This PR fixes a false positive for `Style/MultilineMethodCallIndentation`
when using Ruby 2.7's numbered parameter.
---
 CHANGELOG.md                                          |  4 ++++
 lib/rubocop/ast/node.rb                               |  2 +-
 .../layout/multiline_method_call_indentation_spec.rb  | 11 +++++++++++
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4d96d89895f..e45ec2a0cac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@
 
 * [#7654](https://github.com/rubocop-hq/rubocop/issues/7654): Support `with_fixed_indentation` option for `Layout/ArrayAlignment` cop. ([@nikitasakov][])
 
+### Bug fixes
+
+* [#7779](https://github.com/rubocop-hq/rubocop/issues/7779): Fix a false positive for `Style/MultilineMethodCallIndentation` when using Ruby 2.7's numbered parameter. ([@koic][])
+
 ## 0.80.1 (2020-02-29)
 
 ### Bug fixes
diff --git a/lib/rubocop/ast/node.rb b/lib/rubocop/ast/node.rb
index 65bf9a4935d..b4b9a5e9d5e 100644
--- a/lib/rubocop/ast/node.rb
+++ b/lib/rubocop/ast/node.rb
@@ -291,7 +291,7 @@ def source_length
       ## Destructuring
 
       def_node_matcher :receiver, <<~PATTERN
-        {(send $_ ...) (block (send $_ ...) ...)}
+        {(send $_ ...) ({block numblock} (send $_ ...) ...)}
       PATTERN
 
       def_node_matcher :str_content, '(str $_)'
diff --git a/spec/rubocop/cop/layout/multiline_method_call_indentation_spec.rb b/spec/rubocop/cop/layout/multiline_method_call_indentation_spec.rb
index 659619d1d6b..500dbc701f0 100644
--- a/spec/rubocop/cop/layout/multiline_method_call_indentation_spec.rb
+++ b/spec/rubocop/cop/layout/multiline_method_call_indentation_spec.rb
@@ -248,6 +248,17 @@ def foo
         RUBY
       end
 
+      context '>= Ruby 2.7', :ruby27 do
+        it 'accepts methods being aligned with method that is an argument' \
+           'when using numbered parameter' do
+          expect_no_offenses(<<~RUBY)
+            File.read('data.yml')
+                .then { YAML.safe_load _1 }
+                .transform_values(&:downcase)
+          RUBY
+        end
+      end
+
       it 'accepts methods being aligned with method that is an argument in ' \
          'assignment' do
         expect_no_offenses(<<~RUBY)