Larry Hastings added the comment:

I did as you suggested.  I also discovered that _Py_NewReference is usually a 
macro, and I'd only fixed the version in Objects/object.c (the one not being 
used).  When I fixed both those things, and switched the makefile so it uses a 
different Python interpreter in the build itself, it builds successfully.  The 
interpreter doesn't run though.

The next problem: there are a couple of spots where code asserts the refcount 
of an object must == 1.  This is so they can modify the object in-place.  This 
is usually a sanity-check, so I assume the code knows what it's doing, so I 
removed the refcount assertion.  I did this two or three times: set, unicode, 
and (maybe) bytes.

Now it's segfaulting in lookdict_unicode_nodummy().  mp->ma_keys looks like 
garbage, the keys it refers to are invalid addresses.  I'd be very happy to 
post my patch if someone else wanted to try debugging it.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue26891>
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