From 09d46fa2dabe9d22d0f2a0f23708e012f232d4bb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafael=20Mendon=C3=A7a=20Fran=C3=A7a?= <rafael@franca.dev>
Date: Thu, 16 Apr 2020 18:02:00 -0400
Subject: [PATCH] Fix `Style/CaseEquality` when `AllowOnConstant` is `true`

When the method receiver is implicit it was failing with a NoMethodError
in `nil` error.
---
 CHANGELOG.md                                 | 4 ++++
 lib/rubocop/cop/style/case_equality.rb       | 2 +-
 spec/rubocop/cop/style/case_equality_spec.rb | 6 ++++++
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 309475ebb38..c721e57105e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## master (unreleased)
 
+### Bug fixes
+
+* [#7882](https://github.com/rubocop-hq/rubocop/pull/7882): Fix `Style/CaseEquality` when `AllowOnConstant` is `true` and the method receiver is implicit. ([@rafaelfranca][])
+
 ## 0.82.0 (2020-04-16)
 
 ### New features
diff --git a/lib/rubocop/cop/style/case_equality.rb b/lib/rubocop/cop/style/case_equality.rb
index 5069e948eda..e289e6d882d 100644
--- a/lib/rubocop/cop/style/case_equality.rb
+++ b/lib/rubocop/cop/style/case_equality.rb
@@ -42,7 +42,7 @@ def on_send(node)
 
         def const?(node)
           if cop_config.fetch('AllowOnConstant', false)
-            !node.const_type?
+            !node&.const_type?
           else
             true
           end
diff --git a/spec/rubocop/cop/style/case_equality_spec.rb b/spec/rubocop/cop/style/case_equality_spec.rb
index cd65cdbfe24..e6cfc8e80b5 100644
--- a/spec/rubocop/cop/style/case_equality_spec.rb
+++ b/spec/rubocop/cop/style/case_equality_spec.rb
@@ -21,6 +21,12 @@
       )
     end
 
+    it 'does not fail when the receiver is implicit' do
+      expect_no_offenses(<<~RUBY)
+        puts "No offense"
+      RUBY
+    end
+
     it 'does not register an offense for === when the receiver is a constant' do
       expect_no_offenses(<<~RUBY)
         Array === var