Patch by Victor Stinner.

to get around a mmap bug with sparse files. Patch written by Steffen Daode
Nurpmeso.

to get around a mmap bug with sparse files. Patch written by Steffen Daode
Nurpmeso.

mmap bug with sparse files. Patch written by Steffen Daode Nurpmeso.

descriptor, the check of the object type doesn't read the __class__ attribute
anymore.  Fix a crash if a class override its __class__ attribute (e.g. a proxy
of the str type).

descriptor, the check of the object type doesn't read the __class__ attribute
anymore.  Fix a crash if a class override its __class__ attribute (e.g. a proxy
of the str type).

check of the object type doesn't read the __class__ attribute anymore.  Fix a
crash if a class override its __class__ attribute (e.g. a proxy of the str
type).