diff --git a/scrapy/loader/__init__.py b/scrapy/loader/__init__.py
index 38afa951a..fc8b10bee 100644
--- a/scrapy/loader/__init__.py
+++ b/scrapy/loader/__init__.py
@@ -136,7 +136,6 @@ class ItemLoader(object):
         except Exception as e:
             raise ValueError("Error with output processor: field=%r value=%r error='%s: %s'" % \
                 (field_name, self._values[field_name], type(e).__name__, str(e)))
-        return proc
 
     def get_collected_values(self, field_name):
         return self._values[field_name]
diff --git a/scrapy/loader/processors.py b/scrapy/loader/processors.py
index 85ac2c832..56f2bc564 100644
--- a/scrapy/loader/processors.py
+++ b/scrapy/loader/processors.py
@@ -32,6 +32,7 @@ class MapCompose(object):
                                      "function %s value=%r error='%s: %s'" %
                                      (func.__name__, value,
                                       type(e).__name__, str(e)))
+            values = next_values
         return values