Script field failure

gistfile1.txt

curl -XPUT 'http://localhost:9200/twitter/'

curl -XPUT 'http://localhost:9200/twitter/tweet/1' -d '
{
    "attachmentcontent" : "test of script fields stuff"
}
'

curl -XPUT 'http://localhost:9200/twitter/tweet/2' -d '
{
    "attachmentcontent" : "another test of script fields stuff"
}
'

# Fails because we use a local variable - Worked on 0.14.0, fails on 0.14.2
curl -XGET http://localhost:9200/twitter/_search?pretty=True -d '
{"from":0,"size":20,"query":{"query_string":{"query":"attachmentcontent:test","default_operator":"or"}},"script_fields":{"documentkey":{"script":"_source[fieldName]","params":{"fieldName":"documentkey"}},"attachmentcontent.fragment":{"script":"String blah = _source[fieldName];\nif (blah == null  ||  blah.length() < fragmentSize)  return blah;\nreturn blah.substring(0, fragmentSize);","params":{"fragmentSize":200,"fieldName":"attachmentcontent"}}},"highlight":{"pre_tags":["<WSODHighlight>"],"post_tags":["</WSODHighlight>"],"fields":{"attachmentcontent":{"fragment_size":200,"number_of_fragments":5}}}}'

# Succeeds, no local variable used
curl -XGET http://localhost:9200/twitter/_search?pretty=True -d '
{"from":0,"size":20,"query":{"query_string":{"query":"attachmentcontent:test","default_operator":"or"}},"script_fields":{"documentkey":{"script":"_source[fieldName]","params":{"fieldName":"documentkey"}},"attachmentcontent.fragment":{"script":"if (_source[fieldName] == null  ||  _source[fieldName].length() < fragmentSize)  return _source[fieldName];\nreturn _source[fieldName].substring(0, fragmentSize);","params":{"fragmentSize":200,"fieldName":"attachmentcontent"}}},"highlight":{"pre_tags":["<WSODHighlight>"],"post_tags":["</WSODHighlight>"],"fields":{"attachmentcontent":{"fragment_size":200,"number_of_fragments":5}}}}'