Logcheck devel - Sep 2014 - Bug#762807: logcheck: Cron "sre_constants.error: unexpected end of pattern"

Package: logcheck
Version: 1.3.15
Severity: normal

Dear Maintainer,
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I'm receiving this Cron error email whenever the logcheck cron runs:

Subject: if [ -x /usr/sbin/logcheck ]; then nice -n10 /usr/sbin/logcheck; fi

Message:
Traceback (most recent call last):
  File "/usr/bin/syslog-summary", line 282, in <module>
    main()
  File "/usr/bin/syslog-summary", line 275, in main
    ignore_pats = read_patterns(IGNORE_FILENAME)
  File "/usr/bin/syslog-summary", line 83, in read_patterns
    pats.append(re.compile(rule))
  File "/usr/lib/python2.7/re.py", line 190, in compile
    return _compile(pattern, flags)
  File "/usr/lib/python2.7/re.py", line 242, in _compile
    raise error, v # invalid expression
sre_constants.error: unexpected end of pattern

Any idea why?

In the rest logcheck works perfect.


-- System Information:
Debian Release: 7.6
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.2.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages logcheck depends on:
ii  adduser                                    3.113+nmu3
ii  cron                                       3.0pl1-124
ii  exim4-daemon-light [mail-transport-agent]  4.80-7
ii  lockfile-progs                             0.1.17
ii  logtail                                    1.3.15
ii  mime-construct                             1.11
ii  rsyslog [system-log-daemon]                5.8.11-3

Versions of packages logcheck recommends:
ii  logcheck-database  1.3.15

Versions of packages logcheck suggests:
ii  syslog-summary  1.14-2

-- Configuration Files:
/etc/logcheck/logcheck.conf [Errno 13] Permission denied:
u'/etc/logcheck/logcheck.conf'
/etc/logcheck/logcheck.logfiles [Errno 13] Permission denied:
u'/etc/logcheck/logcheck.logfiles'

-- no debconf information