Create a directory "__init__.py" and execute

>>> import imp
>>> imp.find_module('__init__', ['.'])

to reproduce that issue. It will crash because Python tries to double-close a file pointer: `call_find_module` will call `PyFile_FromFile`, but `PyFile_FromFile` closes the file pointer if it's a directory (by decrefing the created file object) and ` call_find_module` then closes the already closed file.