[issue33720] test_marshal: crash in Python 3.7b5 on Windows 10

[Steve Dower]

Steve Dower <steve.dower at python.org> added the comment:

Ned - PR 7401 fixes the crash at the cost of reducing the permitted recursion depth in marshal.

Your call whether we take this fix or disable PGO, but I'd much rather take this fix (PGO has full-interpreter effects whereas this is very narrow). When I hear back about the compiler bug - if it is one - we should be able to raise the limit again without causing any compatibility issues.

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<https://bugs.python.org/issue33720>
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