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+++ This bug was initially created as a clone of Bug #1249191 +++

Description of problem:
The trace-cmd record command is crashing if a -f filter is used before
a -e event.

The usage a -f before a -e is a command line error, and trace-cmd
record detects this error by checking if the last_event pointer is NULL.

However, the last_event is not initialized as NULL and this command line
error is not detected. Then, the last_event is used to save the filter
options and this causes a segmentation fault because last_event was not
initialized yet.

Version-Release number of selected component (if applicable):
trace-cmd-1.0.5-11.el6.x86_64

How reproducible:
Always

Steps to Reproduce:
1. # trace-cmd record -f foo

Actual results:
  # trace-cmd record -f foo
  Segmentation fault

Expected results:
  # trace-cmd record -f foo
  filter must come after event

Additional info:
  upstream patch proposed: https://lkml.org/lkml/2015/7/20/482

Tested-by: John Kacur <jkacur> send upstream, will apply to our local build

Fixed in version 2.2.4-2 and up

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-0802.html