[GitHub] incubator-spark pull request: Added extra description on ValueErro...

[jyotiska]

Github user jyotiska commented on the pull request:

    https://github.com/apache/incubator-spark/pull/581#issuecomment-35058781
  
    @JoshRosen, I think when the traceback function doesn't return the callsite 
info, it simply returns "I'm lost!". Handled that case in this commit. Can you 
ask Jenkins to test this?