Fix _dump_registry() to use the correct prefix for the private
methods. Reset the negative cache *before* resetting the invalidation
counter, hoping this may plug a race condition (but then again, this
whole module isn't coded to be thread-safe).
diff --git a/Lib/abc.py b/Lib/abc.py
index 07836e6..11ddab2 100644
--- a/Lib/abc.py
+++ b/Lib/abc.py
@@ -157,7 +157,7 @@
print("Class: %s.%s" % (cls.__module__, cls.__name__), file=file)
print("Inv.counter: %s" % ABCMeta.__invalidation_counter, file=file)
for name in sorted(cls.__dict__.keys()):
- if name.startswith("__abc_"):
+ if name.startswith("_ABCMeta__"):
value = getattr(cls, name)
print("%s: %r" % (name, value), file=file)
@@ -174,8 +174,8 @@
# Check negative cache; may have to invalidate
if cls.__negative_cache_version < ABCMeta.__invalidation_counter:
# Invalidate the negative cache
- cls.__negative_cache_version = ABCMeta.__invalidation_counter
cls.__negative_cache = set()
+ cls.__negative_cache_version = ABCMeta.__invalidation_counter
elif subclass in cls.__negative_cache:
return False
# Check the subclass hook