[issue35839] Suggestion: Ignore sys.modules entries with no __spec__ attribute in find_spec

[Nick Coghlan]

Nick Coghlan <ncoghlan at gmail.com> added the comment:

I'd also suggest that we emit ImportWarning when taking the fallback path, since we really would prefer that sys.modules entries either have a valid __spec__, or else explicitly set `__spec__ = None`.

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<https://bugs.python.org/issue35839>
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