Remove objects from identity map if save! failed, otherwise finding again the same record will have invalid attributes.

activerecord/lib/active_record/attribute_methods/dirty.rb

@@ -33,6 +33,9 @@ module ActiveRecord
           @previously_changed = changes
           @changed_attributes.clear
         end
+        rescue
+          IdentityMap.remove(self) if IdentityMap.enabled?
+          raise
       end
 
       # <tt>reload</tt> the record and clears changed attributes.

activerecord/test/cases/identity_map_test.rb

@@ -261,4 +261,17 @@ class IdentityMapTest < ActiveRecord::TestCase
     assert_not_equal developer.salary, same_developer.salary
   end
 
+  def test_reload_object_if_forced_save_failed
+    developer = Developer.first
+    developer.salary = 0
+
+    assert_raise(ActiveRecord::RecordInvalid) { developer.save! }
+
+    same_developer = Developer.first
+
+    assert_not_same  developer, same_developer
+    assert_not_equal 0, same_developer.salary
+    assert_not_equal developer.salary, same_developer.salary
+  end
+
 end