Release Note: Detailed Message in NullPointerExceptions

A new option is available to provide more helpful `NullPointerException` messages:

     -XX:+ShowCodeDetailsInExceptionMessages

If the option is set, on encountering a null pointer, the JVM analyzes the program to determine which reference was `null` and then provides the details as part of `NullPointerException.getMessage()`. In addition to the exception message, the method, filename, and line number are also returned.

By default, this option is disabled.