[issue20929] Undefined behavior flagged by Clang 3.4

[Jeffrey Walton]

Jeffrey Walton added the comment:

The big list of issues earlier has been parred down to the following after `make`:

Objects/longobject.c:40:42: runtime error: index -3 out of bounds for type 'PyLongObject [262]'
Objects/listobject.c:2046:22: runtime error: index 623 out of bounds for type 'PyObject *[256]'
Objects/longobject.c:40:42: runtime error: index -3 out of bounds for type 'PyLongObject [262]'

`make test` still needs to be run.

I'm going to open another bug report since this is a different branch. Is that OK?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20929>
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