Scrub the invalid paramter value before using it in the error

You should be able to safely use the String error message. So when
finding the paramter has an invalid encoding we need to remove the
invalid bytes before using it in the error. Otherwise the caller might
get another Encoding error if they use the message.

1 files changed, 1 insertions, 1 deletions

diff --git a/actionpack/lib/action_dispatch/request/utils.rb b/actionpack/lib/action_dispatch/request/utils.rb
index 4f79c4c21e..daac68d4b4 100644
--- a/actionpack/lib/action_dispatch/request/utils.rb
+++ b/actionpack/lib/action_dispatch/request/utils.rb
@@ -32,7 +32,7 @@ module ActionDispatch
           unless params.valid_encoding?
             # Raise Rack::Utils::InvalidParameterError for consistency with Rack.
             # ActionDispatch::Request#GET will re-raise as a BadRequest error.
-            raise Rack::Utils::InvalidParameterError, "Non UTF-8 value: #{params}"
+            raise Rack::Utils::InvalidParameterError, "Invalid encoding for parameter: #{params.scrub}"
           end
         end
       end