import python-dns-1.15.0-10.el8
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CentOS Sources
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161
SOURCES/fix_unicode_label_escaping.patch
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161
SOURCES/fix_unicode_label_escaping.patch
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From c28f0584ba37cd6b0e9919dcbec652a34a420843 Mon Sep 17 00:00:00 2001
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From: Lumir Balhar <lbalhar@redhat.com>
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Date: Wed, 28 Aug 2019 14:10:36 +0200
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Subject: [PATCH] Backported original patch from:
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https://github.com/rthalley/dnspython/commit/c76aa6ac9969447220c8e807aa1e5640a6c12924
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Unicode label escapify was not escapifying special characters. [Issue #339]
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---
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dns/name.py | 57 +++++++++++++++++++++++-----------------------
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tests/test_name.py | 5 ++++
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2 files changed, 34 insertions(+), 28 deletions(-)
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diff --git a/dns/name.py b/dns/name.py
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index 97e216c..4a064d6 100644
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--- a/dns/name.py
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+++ b/dns/name.py
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@@ -116,20 +116,28 @@ class IDNACodec(object):
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def __init__(self):
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pass
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+ def is_idna(self, label):
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+ return label.lower().startswith(b'xn--')
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+
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+ def is_all_ascii(self, label):
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+ for c in label:
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+ if ord(c) > 0x7f:
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+ return False
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+ return True
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+
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def encode(self, label):
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raise NotImplementedError
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def decode(self, label):
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- # We do not apply any IDNA policy on decode; we just
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- downcased = label.lower()
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- if downcased.startswith(b'xn--'):
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+ # We do not apply any IDNA policy on decode.
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+ if self.is_idna(label):
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try:
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- label = downcased[4:].decode('punycode')
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+ label = label[4:].decode('punycode')
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except Exception as e:
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raise IDNAException(idna_exception=e)
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else:
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label = maybe_decode(label)
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- return _escapify(label, True)
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+ return _escapify(label)
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class IDNA2003Codec(IDNACodec):
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@@ -159,7 +167,7 @@ class IDNA2003Codec(IDNACodec):
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if label == b'':
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return u''
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try:
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- return _escapify(encodings.idna.ToUnicode(label), True)
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+ return _escapify(encodings.idna.ToUnicode(label))
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except Exception as e:
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raise IDNAException(idna_exception=e)
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@@ -197,12 +205,6 @@ class IDNA2008Codec(IDNACodec):
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self.allow_pure_ascii = allow_pure_ascii
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self.strict_decode = strict_decode
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- def is_all_ascii(self, label):
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- for c in label:
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- if ord(c) > 0x7f:
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- return False
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- return True
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-
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def encode(self, label):
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if label == '':
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return b''
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@@ -227,11 +229,12 @@ class IDNA2008Codec(IDNACodec):
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try:
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if self.uts_46:
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label = idna.uts46_remap(label, False, False)
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- return _escapify(idna.ulabel(label), True)
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+ return _escapify(idna.ulabel(label))
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except idna.IDNAError as e:
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raise IDNAException(idna_exception=e)
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_escaped = bytearray(b'"().;\\@$')
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+_escaped_text = '"().;\\@$'
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IDNA_2003_Practical = IDNA2003Codec(False)
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IDNA_2003_Strict = IDNA2003Codec(True)
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@@ -242,13 +245,13 @@ IDNA_2008_Strict = IDNA2008Codec(False, False, False, True)
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IDNA_2008_Transitional = IDNA2008Codec(True, True, False, False)
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IDNA_2008 = IDNA_2008_Practical
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-def _escapify(label, unicode_mode=False):
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+def _escapify(label):
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"""Escape the characters in label which need it.
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- @param unicode_mode: escapify only special and whitespace (<= 0x20)
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- characters
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@returns: the escaped string
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@rtype: string"""
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- if not unicode_mode:
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+ if isinstance(label, bytes):
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+ # Ordinary DNS label mode. Escape special characters and values
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+ # < 0x20 or > 0x7f.
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text = ''
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if isinstance(label, text_type):
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label = label.encode()
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@@ -259,19 +262,17 @@ def _escapify(label, unicode_mode=False):
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text += chr(c)
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else:
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text += '\\%03d' % c
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- return text.encode()
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+ return text
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+ # Unicode label mode. Escape only special characters and values < 0x20
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text = u''
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- if isinstance(label, binary_type):
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- label = label.decode()
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for c in label:
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- if c > u'\x20' and c < u'\x7f':
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- text += c
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+ if c in _escaped_text:
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+ text += '\\' + c
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+ elif c <= '\x20':
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+ text += '\\%03d' % ord(c)
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else:
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- if c >= u'\x7f':
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- text += c
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- else:
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- text += u'\\%03d' % ord(c)
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+ text += c
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return text
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def _validate_labels(labels):
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@@ -519,8 +520,8 @@ class Name(object):
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l = self.labels[:-1]
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else:
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l = self.labels
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- s = b'.'.join(map(_escapify, l))
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- return maybe_decode(s)
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+ s = '.'.join(map(_escapify, l))
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+ return s
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def to_unicode(self, omit_final_dot=False, idna_codec=None):
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"""Convert name to Unicode text format.
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diff --git a/tests/test_name.py b/tests/test_name.py
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index f2a8773..fa1d3eb 100644
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--- a/tests/test_name.py
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+++ b/tests/test_name.py
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@@ -255,6 +255,11 @@ class NameTestCase(unittest.TestCase):
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t = dns.name.root.to_unicode()
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self.assertEqual(t, '.')
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+ def testToText12(self):
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+ n = dns.name.from_text(r'a\.b.c')
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+ t = n.to_unicode()
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+ self.assertEqual(t, r'a\.b.c.')
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+
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def testSlice1(self):
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n = dns.name.from_text(r'a.b.c.', origin=None)
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s = n[:]
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--
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2.21.0
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@ -1,6 +1,6 @@
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Name: python-dns
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Name: python-dns
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Version: 1.15.0
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Version: 1.15.0
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Release: 8%{?dist}
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Release: 10%{?dist}
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Summary: DNS toolkit for Python
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Summary: DNS toolkit for Python
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License: MIT
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License: MIT
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@ -10,6 +10,9 @@ Source0: http://www.dnspython.org/kits/%{version}/dnspython-%{version}.tar.gz
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BuildArch: noarch
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BuildArch: noarch
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Patch0: test_fails_on_missing_file.patch
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Patch0: test_fails_on_missing_file.patch
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# Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1731081
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# Upstream issue: https://github.com/rthalley/dnspython/issues/339
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Patch1: fix_unicode_label_escaping.patch
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BuildRequires: python3-devel
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BuildRequires: python3-devel
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BuildRequires: python3-setuptools
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BuildRequires: python3-setuptools
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@ -68,7 +71,15 @@ find examples -type f | xargs chmod a-x
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%changelog
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%changelog
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* Mon Aug 27 2018 Miro Hrončok <mhroncok@redhat.com>
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* Thu Oct 24 2019 Lumír Balhar <lbalhar@redhat.com> - 1.15.0-10
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- Release bump for gating
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Related: rhbz#1731081
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* Wed Aug 28 2019 Lumír Balhar <lbalhar@redhat.com> - 1.15.0-9
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- Fix unicode label escaping
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Resolves: rhbz#1731081
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* Mon Aug 27 2018 Miro Hrončok <mhroncok@redhat.com> - 1.15.0-8
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- Drop python2 subpackage (#1567168)
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- Drop python2 subpackage (#1567168)
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* Mon Jun 25 2018 Petr Viktorin <pviktori@redhat.com> - 1.15.0-7
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* Mon Jun 25 2018 Petr Viktorin <pviktori@redhat.com> - 1.15.0-7
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