From 32af5cef758888befe51adec870147a92e4f3d98 Mon Sep 17 00:00:00 2001
From: Ben Hutchings <ben@decadent.org.uk>
Date: Fri, 28 Dec 2018 15:15:27 +0000
Subject: [PATCH] debian/lib/python/debian_linux/debian.py: Fix deprecated
 import of MutableSet

Python 3.7 warns:

.../debian/lib/python/debian_linux/debian.py:403: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated, and in 3.8 it will stop working
  class PackageArchitecture(collections.MutableSet):
---
 debian/changelog                         | 2 ++
 debian/lib/python/debian_linux/debian.py | 3 ++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/debian/changelog b/debian/changelog
index a672047e8..45a53481a 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -12,6 +12,8 @@ linux (4.19.12-2) UNRELEASED; urgency=medium
   * [powerpc,powerpcspe,ppc64] linux-config: Eliminate config.*_bootwrapper.gz
     files
   * [powerpcspe] Fix -mcpu= options for SPE-only compiler
+  * debian/lib/python/debian_linux/debian.py: Fix deprecated import of
+    MutableSet
 
   [ Salvatore Bonaccorso ]
   * USB: hso: Fix OOB memory access in hso_probe/hso_get_config_data
diff --git a/debian/lib/python/debian_linux/debian.py b/debian/lib/python/debian_linux/debian.py
index 5d1dda09f..6fb26185d 100644
--- a/debian/lib/python/debian_linux/debian.py
+++ b/debian/lib/python/debian_linux/debian.py
@@ -1,4 +1,5 @@
 import collections
+import collections.abc
 import os.path
 import re
 import unittest
@@ -400,7 +401,7 @@ class _VersionLinuxTest(unittest.TestCase):
         self.assertTrue(v.linux_revision_other)
 
 
-class PackageArchitecture(collections.MutableSet):
+class PackageArchitecture(collections.abc.MutableSet):
     __slots__ = '_data'
 
     def __init__(self, value=None):