[issue32932] better error message when __all__ contains non-str objects

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

I was wondering why the error is not raised by the IMPORT_NAME opcode which predates IMPORT_FROM. It calls _handle_fromlist() from _bootstrap. But in this case the module doesn't have the __path__ attribute and the sanity check was skipped.

I'm wondering if it is enough to add the sanity check in _handle_fromlist() for the case when the module doesn't have the __path__ attribute. The Python code could be simpler than the C code.

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<https://bugs.python.org/issue32932>
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