Found the next crasher by thinking about this logic in PyPy.

f4166904 · Armin Rigo · af795e5e · f4166904
Kaydet (Commit) f4166904 authored Eyl 03, 2009 tarafından Armin Rigo
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slot_tp_new.py Lib/test/crashers/slot_tp_new.py +11 -0

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--- a/Lib/test/crashers/slot_tp_new.py
+++ b/Lib/test/crashers/slot_tp_new.py
+"""
+Infinite C recursion involving PyObject_GetAttr in slot_tp_new.
+"""
+
+class X(object):
+    class __metaclass__(type):
+        pass
+    __new__ = 5
+
+X.__metaclass__.__new__ = property(X)
+print X()