Merge pull request #35049 from yuki24/fix-33414

Fixed a bug where the debug view does not show the error page properly

1 files changed, 14 insertions, 10 deletions

diff --git a/actionpack/lib/action_dispatch/middleware/exception_wrapper.rb b/actionpack/lib/action_dispatch/middleware/exception_wrapper.rb
index fb2b2bd3b0..1fb3e9db00 100644
--- a/actionpack/lib/action_dispatch/middleware/exception_wrapper.rb
+++ b/actionpack/lib/action_dispatch/middleware/exception_wrapper.rb
@@ -31,22 +31,34 @@ module ActionDispatch
       "ActionController::MissingExactTemplate" => "missing_exact_template",
     )
 
+    cattr_accessor :wrapper_exceptions, default: [
+      "ActionView::Template::Error"
+    ]
+
     attr_reader :backtrace_cleaner, :exception, :wrapped_causes, :line_number, :file
 
     def initialize(backtrace_cleaner, exception)
       @backtrace_cleaner = backtrace_cleaner
-      @exception = original_exception(exception)
+      @exception = exception
       @wrapped_causes = wrapped_causes_for(exception, backtrace_cleaner)
 
       expand_backtrace if exception.is_a?(SyntaxError) || exception.cause.is_a?(SyntaxError)
     end
 
+    def unwrapped_exception
+      if wrapper_exceptions.include?(exception.class.to_s)
+        exception.cause
+      else
+        exception
+      end
+    end
+
     def rescue_template
       @@rescue_templates[@exception.class.name]
     end
 
     def status_code
-      self.class.status_code_for_exception(@exception.class.name)
+      self.class.status_code_for_exception(unwrapped_exception.class.name)
     end
 
     def application_trace
@@ -122,14 +134,6 @@ module ActionDispatch
         Array(@exception.backtrace)
       end
 
-      def original_exception(exception)
-        if @@rescue_responses.has_key?(exception.cause.class.name)
-          exception.cause
-        else
-          exception
-        end
-      end
-
       def causes_for(exception)
         return enum_for(__method__, exception) unless block_given?