From 894acf9588ba8f4f9d080e3ffe7a5d4d88d061cd Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron@rubyonrails.org>
Date: Tue, 27 Sep 2022 09:43:15 -0700
Subject: [PATCH] Wrapping the cause should do the "SyntaxError" magic

---
 .../lib/action_dispatch/middleware/exception_wrapper.rb       | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/actionpack/lib/action_dispatch/middleware/exception_wrapper.rb b/actionpack/lib/action_dispatch/middleware/exception_wrapper.rb
index 796a765a05..1be05eb75f 100644
--- a/actionpack/lib/action_dispatch/middleware/exception_wrapper.rb
+++ b/actionpack/lib/action_dispatch/middleware/exception_wrapper.rb
@@ -46,10 +46,10 @@ class ExceptionWrapper
     def initialize(backtrace_cleaner, exception)
       @backtrace_cleaner = backtrace_cleaner
       @exception = exception
-      @exception_class_name = @exception.class.name
+      @exception_class_name = exception.class.name
       @wrapped_causes = wrapped_causes_for(exception, backtrace_cleaner)
 
-      expand_backtrace if exception.is_a?(SyntaxError) || exception.cause.is_a?(SyntaxError)
+      expand_backtrace if exception.is_a?(SyntaxError)
     end
 
     def routing_error?