Re-position RescuedExceptionInterceptor middleware

sentry-rails/lib/sentry/rails/railtie.rb

@@ -8,8 +8,8 @@ class Railtie < ::Rails::Railtie
     initializer "sentry.use_rack_middleware" do |app|
       # placed after all the file-sending middlewares so we can avoid unnecessary transactions
       app.config.middleware.insert_after ActionDispatch::Executor, Sentry::Rails::CaptureExceptions
-      # need to be placed at last to smuggle app exceptions via env
-      app.config.middleware.use(Sentry::Rails::RescuedExceptionInterceptor)
+      # need to place as close to DebugExceptions as possible to intercept most of the exceptions, including those raised by middlewares
+      app.config.middleware.insert_after ActionDispatch::DebugExceptions, Sentry::Rails::RescuedExceptionInterceptor
     end
 
     # because the extension works by registering the around_perform callcack, it should always be ran

sentry-rails/spec/sentry/rails_spec.rb

@@ -26,7 +26,8 @@
       app = Rails.application
       index_of_executor = app.middleware.find_index { |m| m == ActionDispatch::Executor }
       expect(app.middleware.find_index(Sentry::Rails::CaptureExceptions)).to eq(index_of_executor + 1)
-      expect(app.middleware.find_index(Sentry::Rails::RescuedExceptionInterceptor)).to eq(app.middleware.count - 1)
+      index_of_debug_exceptions = app.middleware.find_index { |m| m == ActionDispatch::DebugExceptions }
+      expect(app.middleware.find_index(Sentry::Rails::RescuedExceptionInterceptor)).to eq(index_of_debug_exceptions + 1)
     end
 
     it "inserts a callback to disable background_worker for the runner mode" do