elasticsearch/logstash — pull request #1400 by Wilfred (2014-05-22 10:17:03+00:00)
Title: Updating JAVASTACKTRACEPART to recognise native methods and methods with numbers

For example:

at sun.nio.ch.FileDispatcherImpl.read0(Native Method)

This does not have a filename or line number, and the method name
'read0' does not match the WORD pattern.