[issue36218] .sort() segfaults consistently on crafted input

[Lysandros Nikolaou]

Lysandros Nikolaou <lisandrosnik at gmail.com> added the comment:

Can confirm for 3.7.2 on my macOS 10.14 system. Although this is the case in 3.7 on my current build of the master branch I get the following AssertionError instead:

Assertion failed: (v->ob_type == w->ob_type), function unsafe_tuple_compare, file Objects/listobject.c, line 2164

It seems like the AssertionError gets thrown in unsafe_tuple_compare().
Link: https://github.com/python/cpython/blob/dc078947a5033a048d804e244e847b5844734439/Objects/listobject.c#L2164

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nosy: +lys.nikolaou

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<https://bugs.python.org/issue36218>
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