Merge pull request #8547 from printercu/patch-1

fix for messages in invalid encoding from db-drivers

Conflicts:
	activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
	activerecord/test/cases/connection_adapters/abstract_adapter_test.rb

activerecord/lib/active_record/connection_adapters/abstract_adapter.rb

@@ -457,7 +457,12 @@ module ActiveRecord
       end
 
       def translate_exception_class(e, sql)
-        message = "#{e.class.name}: #{e.message}: #{sql}"
+        begin
+          message = "#{e.class.name}: #{e.message}: #{sql}"
+        rescue Encoding::CompatibilityError
+          message = "#{e.class.name}: #{e.message.force_encoding sql.encoding}: #{sql}"
+        end
+
         @logger.error message if @logger
         exception = translate_exception(e, message)
         exception.set_backtrace e.backtrace

activerecord/test/cases/adapter_test.rb

@@ -213,6 +213,14 @@ module ActiveRecord
     test "type_to_sql returns a String for unmapped types" do
       assert_equal "special_db_type", @connection.type_to_sql(:special_db_type)
     end
+
+    def test_log_invalid_encoding
+      assert_raise ActiveRecord::StatementInvalid do
+        @connection.send :log, "SELECT 'ы' FROM DUAL" do
+          raise 'ы'.force_encoding(Encoding::ASCII_8BIT)
+        end
+      end
+    end
   end
 
   class AdapterTestWithoutTransaction < ActiveRecord::TestCase