-- trying a different approach to see if the crash on Windows goes away.
Running a script with PyRun_File -- a Python/C API function -- was probably
the cause for crashes on Windows, because it uses a pointer to a FILE
struct and on windows this struct can be "different and incompatible"
depending on which libc was used to build the program. This is mentioned in
the Python/C API Ref Manual, chapter 2.
Now we're loading the file contents to a string buffer and using PyRun_String.
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