[Fix #11631] Fix an incorrect autocorrect for `Style/ArgumentsForward…

…ing`

Fixes #11631.

This PR fixes an incorrect autocorrect for `Style/ArgumentsForwarding`
when using arguments forwarding for `.()` call.

changelog/fix_an_incorrect_autocorrect_for_style_arguments_forwarding.md

@@ -0,0 +1 @@
+* [#11631](https://github.com/rubocop/rubocop/issues/11631): Fix an incorrect autocorrect for `Style/ArgumentsForwarding` when using arguments forwarding for `.()` call. ([@koic][])

lib/rubocop/cop/style/arguments_forwarding.rb

@@ -124,9 +124,9 @@ def all_lvars_as_forwarding_method_arguments?(def_node, forwarding_method)
 
         def register_offense_to_forwarding_method_arguments(forwarding_method)
           add_offense(arguments_range(forwarding_method)) do |corrector|
-            range = range_between(
-              forwarding_method.loc.selector.end_pos, forwarding_method.source_range.end_pos
-            )
+            begin_pos = forwarding_method.loc.selector&.end_pos || forwarding_method.loc.dot.end_pos
+            range = range_between(begin_pos, forwarding_method.source_range.end_pos)
+
             corrector.replace(range, '(...)')
           end
         end

spec/rubocop/cop/style/arguments_forwarding_spec.rb

@@ -109,6 +109,22 @@ def foo(*args, &block)
       RUBY
     end
 
+    it 'registers an offense when using restarg and block arg for `.()` call' do
+      expect_offense(<<~RUBY)
+        def foo(*args, &block)
+                ^^^^^^^^^^^^^ Use arguments forwarding.
+          bar.(*args, &block)
+               ^^^^^^^^^^^^^ Use arguments forwarding.
+        end
+      RUBY
+
+      expect_correction(<<~RUBY)
+        def foo(...)
+          bar.(...)
+        end
+      RUBY
+    end
+
     it 'does not register an offense when using arguments forwarding' do
       expect_no_offenses(<<~RUBY)
         def foo(...)