Merged r13141 (#16926).

git-svn-id: http://svn.redmine.org/redmine/branches/2.5-stable@13163 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/redmine/field_format.rb

@@ -98,9 +98,10 @@ def cast_value(custom_field, value, customized=nil)
         if value.blank?
           nil
         elsif value.is_a?(Array)
-          value.map do |v|
+          casted = value.map do |v|
             cast_single_value(custom_field, v, customized)
-          end.sort
+          end
+          casted.compact.sort
         else
           cast_single_value(custom_field, value, customized)
         end

test/unit/lib/redmine/field_format/version_field_format_test.rb

@@ -56,4 +56,11 @@ def test_possible_values_options_should_return_project_versions_with_selected_st
 
     assert_equal expected, field.possible_values_options(project).map(&:first)
   end
+
+  def test_cast_value_should_not_raise_error_when_array_contains_value_casted_to_nil
+    field = IssueCustomField.new(:field_format => 'version')
+    assert_nothing_raised do
+      field.cast_value([1,2, 42])
+    end
+  end
 end