Fix autocorrection of trivial body for `Naming/RescuedExceptionsVaria…

…bleName` (#9398)

CHANGELOG.md

@@ -6,6 +6,7 @@
 
 ### Bug fixes
 
+* [#7766](https://github.com/rubocop-hq/rubocop/issues/7766): Rename rescue body vars when renaming exception name. ([@asterite][])
 * [#9342](https://github.com/rubocop-hq/rubocop/issues/9342): Fix an error for `Lint/RedundantDirGlobSort` when using `collection.sort`. ([@koic][])
 * [#9304](https://github.com/rubocop-hq/rubocop/issues/9304): Do not register an offense for `Style/ExplicitBlockArgument` when the `yield` arguments are not an exact match with the block arguments. ([@dvandersluis][])
 * [#8281](https://github.com/rubocop-hq/rubocop/issues/8281): Fix Style/WhileUntilModifier handling comments and assignment when correcting to modifier form. ([@Darhazer][])
@@ -5367,3 +5368,4 @@
 [@magneland]: https://github.com/magneland
 [@k-karen]: https://github.com/k-karen
 [@uplus]: https://github.com/uplus
+[@asterite]: https://github.com/asterite

lib/rubocop/cop/naming/rescued_exceptions_variable_name.rb

@@ -71,7 +71,7 @@ def on_resbody(node)
           add_offense(range, message: message) do |corrector|
             corrector.replace(range, preferred_name)
 
-            node.body&.each_descendant(:lvar) do |var|
+            node.body&.each_node(:lvar) do |var|
               next unless var.children.first == offending_name
 
               corrector.replace(var, preferred_name)

spec/rubocop/cop/naming/rescued_exceptions_variable_name_spec.rb

@@ -42,6 +42,25 @@
           RUBY
         end
 
+        it 'registers an offense when using `exc` and renames its usage' do
+          expect_offense(<<~RUBY)
+            begin
+              something
+            rescue MyException => exc
+                                  ^^^ Use `e` instead of `exc`.
+              exc
+            end
+          RUBY
+
+          expect_correction(<<~RUBY)
+            begin
+              something
+            rescue MyException => e
+              e
+            end
+          RUBY
+        end
+
         it 'registers offenses when using `foo` and `bar` ' \
            'in multiple rescues' do
           expect_offense(<<~RUBY)