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Description of problem:
Search for Open Files producing Glib-CRITICAL asserts: g_regex_match_full: assertion `regex != NULL' failed

This is expected since I'm searching for empty string/regexp, but it is happening just sometimes

Version-Release number of selected component (if applicable):
gnome-system-monitor-3.8.2.1-5.el7

How reproducible:
100%

Steps to Reproduce:
1. open g-s-m from cmd line, open Search for Open Files dialog
2. leave the search filed empty and hit Find
3. watch cmd line - there are lot of Glib-CRITICAL asserts dealing with regex
4. close Search for Open Files dialog
5. open it again
6. repeat step 2.

Actual results:
No more asserts full list of opened files displayed in Search results.

Expected results:
I would expect coherent behaviour

Additional info:

This does not seem to be a problem in the version included in the desktop rebase.

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-2015-2215.html