[Fix rubocop#8466] Fix a false positive for Lint/UriRegexp

Fixes rubocop#8466.

This PR fixes a false positive for `Lint/UriRegexp`
when using `regexp` method without receiver.

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Bug fixes
 
 * [#8463](https://github.com/rubocop-hq/rubocop/pull/8463): Fix false positives for `Lint/OutOfRangeRegexpRef` when a regexp is defined and matched in separate steps. ([@eugeneius][])
+* [#8466](https://github.com/rubocop-hq/rubocop/issues/8466): Fix a false positive for `Lint/UriRegexp` when using `regexp` method without receiver. ([@koic][])
 
 ## 0.89.0 (2020-08-05)
 

lib/rubocop/cop/lint/uri_regexp.rb

@@ -32,7 +32,7 @@ class UriRegexp < Base
         PATTERN
 
         def on_send(node)
-          return unless node.method?(:regexp)
+          return unless node.method?(:regexp) && node.receiver
 
           captured_values = uri_regexp_with_argument?(node) || uri_regexp_without_argument?(node)
 

spec/rubocop/cop/lint/uri_regexp_spec.rb

@@ -5,6 +5,12 @@
 
   let(:config) { RuboCop::Config.new }
 
+  it 'does not register an offense when using `regexp` without receiver' do
+    expect_no_offenses(<<~RUBY)
+      regexp('http://example.com')
+    RUBY
+  end
+
   it 'registers an offense and corrects using `URI.regexp` with argument' do
     expect_offense(<<~RUBY)
       URI.regexp('http://example.com')