Fix an incorrect autocorrect for Lint/RegexpAsCondition

changelog/fix_an_incorrect_autocorrect_for_lint_regexp_as_condition.md

@@ -0,0 +1 @@
+* [#11351](https://github.com/rubocop/rubocop/pull/11351): Fix an incorrect autocorrect for `Lint/RegexpAsCondition` when using regexp literal with bang. ([@koic][])

lib/rubocop/cop/lint/regexp_as_condition.rb

@@ -17,13 +17,19 @@ module Lint
       #     do_something
       #   end
       class RegexpAsCondition < Base
+        include IgnoredNode
         extend AutoCorrector
 
         MSG = 'Do not use regexp literal as a condition. ' \
               'The regexp literal matches `$_` implicitly.'
 
         def on_match_current_line(node)
+          return if node.ancestors.none?(&:conditional?)
+          return if part_of_ignored_node?(node)
+
           add_offense(node) { |corrector| corrector.replace(node, "#{node.source} =~ $_") }
+
+          ignore_node(node)
         end
       end
     end

spec/rubocop/cop/lint/regexp_as_condition_spec.rb

@@ -14,12 +14,31 @@
     RUBY
   end
 
+  it 'registers an offense and corrects for a regexp literal with bang in `if` condition' do
+    expect_offense(<<~RUBY)
+      if !/foo/
+          ^^^^^ Do not use regexp literal as a condition. The regexp literal matches `$_` implicitly.
+      end
+    RUBY
+
+    expect_correction(<<~RUBY)
+      if !/foo/ =~ $_
+      end
+    RUBY
+  end
+
   it 'does not register an offense for a regexp literal outside conditions' do
     expect_no_offenses(<<~RUBY)
       /foo/
     RUBY
   end
 
+  it 'does not register an offense for a regexp literal with bang outside conditions' do
+    expect_no_offenses(<<~RUBY)
+      !/foo/
+    RUBY
+  end
+
   it 'does not register an offense for a regexp literal with `=~` operator' do
     expect_no_offenses(<<~RUBY)
       if /foo/ =~ str