Christian Heimes avatar Christian Heimes committed 26a4378

Fixed two small problems in regrtest found by Amaury. This fixes issue #1539. Thanks Amaury!

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Files changed (1)

Lib/test/regrtest.py

     pic = sys.path_importer_cache.copy()
     abcs = {}
     for abc in [getattr(_abcoll, a) for a in _abcoll.__all__]:
-        if not isinstance(abc, _Abstract):
+        if not issubclass(abc, _Abstract):
             continue
         for obj in abc.__subclasses__() + [abc]:
             abcs[obj] = obj._abc_registry.copy()
     import struct, filecmp, _abcoll
     from abc import _Abstract
     from distutils.dir_util import _path_created
+    from weakref import WeakSet
 
     # Restore some original values.
     warnings.filters[:] = fs
         if not issubclass(abc, _Abstract):
             continue
         for obj in abc.__subclasses__() + [abc]:
-            obj._abc_registry = abcs.get(obj, {}).copy()
+            obj._abc_registry = abcs.get(obj, WeakSet()).copy()
             obj._abc_cache.clear()
             obj._abc_negative_cache.clear()
 
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