Review request for JDK-8134930: Defer stack trace walking of NashornException for extracting line number and file name

[Attila Szegedi]

Please review JDK-8134930 "Defer stack trace walking of NashornException for 
extracting line number and file name" at 
<http://cr.openjdk.java.net/~attila/8134930/webrev.01.jdk9> for 
<https://bugs.openjdk.java.net/browse/JDK-8134930>

Thanks,
  Attila.